S9086-RH-STM-010 Ch 503 Pumps Rev 4

S9086-RH-STM-010 0910-LP-108-3282

REVISION 4

NAVAL SHIP’S TECHNICAL MANUAL CHAPTER 503

PUMPS

SUPERSEDES CHAPTER 503 OF 503 OF 31 DEC 2000 DISTRIBUTION STATEMENT C: DISTRIBUTION AUTHORIZED TO U.S. GOVERNMENT AGENCIES AGENC IES AND THEIR CONTR CONTRACTOR ACTORS; S; ADMINI ADMINISTRA STRATIVE/O TIVE/OPERA PERATIONAL TIONAL USE; 30 JULY 1993 OTHER REQUESTS FOR THIS DOCUMENT WILL BE REFERRED TO THE NAVAL SEA SYSTEMS COMMAND (KSWCD-SSES 944). DISTRIBUTION NOTICE: DESTROY BY ANY METHOD THAT WILL PREVENT DISCLOSURE OF CONTENTS OR RECONSTRUCTION OF THIS DOCUMENT PUBLISHED BY THE DIRECTION OF COMMANDER, NAVAL SEA SYSTEMS COMMAND

31 JAN 2009

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S9086-RH-STM-010

REVISION RECORD REVISION NO.

DATE

4

31 JA JAN N 20 2009 09

TITLE AND/OR BRIEF DESCRIPTION/PREPARING ACTIVITY REVI RE VISI SION ON 4 CH CHAN ANGE GE IS TH THE E RE RESU SULT LT OF NA NAVS VSEA EA LT LTR R 95 9503 03 PM PMS S 31 312 2 SE SER R 08-0690 OF 21 APR 2008 ON REPAIRING PUMPS. PARAGRAPH(S) 503-2.12.4.2.1 PARAGRAPH(S) 503-2.12.4.2.1 AND AND 503-2.12.4.2.2 503-2.12.4.2.2



























REVISION RECORD-2 @@FIpgtype@@BLANK@@!FIpgtype@@



























S9086-RH-STM-010

TABLE OF CONTENTS

Chapter/Paragraph

Page

503

PUMPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1

SECTION 1

SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1

503-1. 503 -1.1 1 SAF SAFETY ETY PRE PRECAU CAUTIO TIONS NS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 503-1. 503 -1.1.1 1.1 Saf Safety ety Ref Refere erence nces: s: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1 1-1

SECTION 2

CENT CE NTRI RIFU FUGA GAL L PU PUMP MPS S

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2-1

503-2.1 5032.1

CENTRIFUG CENT RIFUGAL AL PUMP SAFET SAFETY Y PRECA PRECAUTIO UTIONS. NS. . . . . . . . . . . . . . . . . . .

2-1

503-2. 503 -2.2 2

GENER GE NERAL AL DES DESCRI CRIPTI PTION. ON.

2-1

503-2.3 5032.3

CENTRIFUG CENT RIFUGAL AL PUMP TERM TERMINOL INOLOGY OGY..

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2-1

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2-3 2-4 2-4 2-5

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2-5

503-2. 503 -2.4 4 CEN CENTRI TRIFUG FUGAL AL PUM PUMP P TYP TYPES. ES. 503-2. 503 -2.4.3 4.3 Spe Specifi cificc Spe Speed ed . . . . . . 503-2. 503 -2.4.4 4.4 Vacu acuum um Pum Pumps. ps. . . . . . 503-2. 503 -2.4.5 4.5 Can Canned ned Mot Motor or Pum Pumps. ps. . 503-2.5 5032.5

OPERA OPER ATION PRINC PRINCIPLES IPLES..

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503-2.6 5032.6 CLAS CLASSIFICA SIFICATION. TION. . . . . . . . . . . . . . . . . . . . . 503-2.6.1 5032.6.1 GENE GENERAL RAL CLAS CLASSIFICA SIFICATION TIONS S . . . . . . . . 503-2. 503 -2.6.2 6.2 Ser Servic vicee App Applic licati ation. on. . . . . . . . . . . . . . . . . 503-2.6.3 5032.6.3 Gener General al Chara Characteri cteristic stics. s. . . . . . . . . . . . . . . 503-2. 503 -2.6.3 6.3.3 .3 Net Pos Positi itive ve Suct Suction ion Hea Head. d. . . . . . 503-2. 503 -2.6.3 6.3.3. .3.1 1 Avai vailab lable le NPS NPSH. H. . 50350 3-2. 2.6. 6.3. 3.3. 3.2 2 Requ Re quir ired ed NP NPSH SH.. . 503-2. 503 -2.6.3 6.3.4 .4 Suc Suctio tion n Lif Lift. t. . . . . . . . . . . . . . 503-2. 503 -2.6.3 6.3.5 .5 Cav Cavita itati tion. on. . . . . . . . . . . . . . . 503-2. 503 -2.6.3 6.3.6 .6 Rec Recirc ircula ulatio tion. n. . . . . . . . . . . . . 503-2. 503 -2.6.3 6.3.7 .7 Sys System tem Cur Curves ves.. . . . . . . . . . . . 503-2. 503 -2.6.3 6.3.8 .8 Ser Series ies Ope Operat ration ion.. . . . . . . . . . . . 503-2. 503 -2.6.3 6.3.9 .9 Par Parall allel el Ope Operat ration ion.. . . . . . . . . . . 503-2. 503 -2.6.4 6.4 App Applic licati ations ons.. . . . . . . . . . . . . . . . . . . . . 503-2. 503 -2.6.4 6.4.1 .1 Mai Main n Fee Feed d Pum Pumps ps.. . . . . . . . . . . 503-2. 503 -2.6.4 6.4.2 .2 Fee Feed d Boo Booste sterr Pum Pumps. ps. . . . . . . . . 503-2. 503 -2.6.4 6.4.3 .3 Con Conden densat satee Pum Pumps. ps. . . . . . . . . . 503-2.6.4 5032.6.4.4 .4 Main Cond Condenser enser Circu Circulati lating ng Pump Pumps. s.

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2-6 2-6 2-7 2-7 2-9 2-9 2-9 2-9 2-9 2-10 2-10 2-13 2-14 2-14 2-14 2-14 2-15 2-15



























S9086-RH-STM-010

TABLE OF CONTENTS - Continued

Chapter/Paragraph

Page 503-2.6.4.11 503-2.6.4 .11 503-2.6.4 5032.6.4.12 .12 503-2.6.4 5032.6.4.13 .13

Portable Subm Portable Submersib ersible le Pump Pumps. s. . . . . . . . . . . . . . . . . . . . . Portable Port able Engi Engine-Dr ne-Driven iven Pump Pumps. s. . . . . . . . . . . . . . . . . . . Vacuum Prim Priming ing Pump Pumps. s. . . . . . . . . . . . . . . . . . . . . . .

503-2.7 5032.7 CENT CENTRIFUG RIFUGAL AL PUMP OPER OPERA ATION TION.. . . . . . . . . . . . . . . . . 503-2.7.2 5032.7.2 Tr Troubl oublesho eshootin oting. g. . . . . . . . . . . . . . . . . . . . . . . . . . 503-2 50 3-2.7. .7.2.1 2.1 No Liq Liquid uid Del Delive ivered red.. . . . . . . . . . . . . . . . 503-2.7.2 5032.7.2.2 .2 Not Enou Enough gh Liqu Liquid id Deli Delivered vered.. . . . . . . . . . . 503-2 50 3-2.7. .7.2.3 2.3 No Nott Eno Enough ugh Pre Pressu ssure. re. . . . . . . . . . . . . . . . 503-2.7.2 5032.7.2.4 .4 Pump Works for for a While, While, Then Then Fails Fails to Deliv Deliver er.. 503-2.7.2 5032.7.2.5 .5 Pump Takes too Much Power Power.. . . . . . . . . . . 503-2.7.2 5032.7.2.6 .6 Exce Excessiv ssivee Leakage Leakage from Stuf Stufffing Box. . . . . . . 503-2 50 3-2.7. .7.2.7 2.7 Sho Short rt Lif Lifee of of Pack Packing ing.. . . . . . . . . . . . . . . . 503-2 50 3-2.7. .7.2.8 2.8 Vibr ibrati ation on or Noi Noise. se. . . . . . . . . . . . . . . . . 503-2 50 3-2.7. .7.2.9 2.9 Sho Short rt Lif Lifee of of Bear Bearin ings. gs. . . . . . . . . . . . . . . 503-2.7.2 5032.7.2.10 .10 Over Overheati heating ng and Seizi Seizing. ng. . . . . . . . . . . . . . 503-2. 503 -2.7.3 7.3 Lu Lubri bricat cation ion.. . . . . . . . . . . . . . . . . . . . . . . . . . . . 503-2. 503 -2.7.4 7.4 Vent ents. s. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 503-2. 503 -2.7.5 7.5 Byp Bypass ass Lin Lines. es. . . . . . . . . . . . . . . . . . . . . . . . . . . 50350 3-2. 2.7. 7.6 6 Pr Prim imin ing. g. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 503-2.7.7 5032.7.7 Oper Operation ation at Best Ef Effficien iciency cy Point Point.. . . . . . . . . . . . . . . 503-2. 503 -2.7.8 7.8 Ex Exces cesss Cap Capaci acity ty.. . . . . . . . . . . . . . . . . . . . . . . . . . 503-2. 503 -2.7.9 7.9 Red Reduce uced d Cap Capaci acity ty.. . . . . . . . . . . . . . . . . . . . . . . . .

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503-2. 503 -2.8 8 MA MAINT INTENA ENANCE NCE.. . . . . . . . . . . . . . . . . . . . . 503-2. 503 -2.8.1 8.1 Us Using ing PMS PMS/M /MRCs RCs.. . . . . . . . . . . . . . . . 503-2.8.2 5032.8.2 Usin Using g Techni echnical cal Manu Manuals. als. . . . . . . . . . . . 503-2.8.3 5032.8.3 In-Se In-Service rvice Obser Observati vations. ons. . . . . . . . . . . . . 503-2.8.4 5032.8.4 Lant Lantern ern Ring Rings, s, Sleev Sleeves, es, and Flin Flingers. gers. . . . . . 503-2. 503 -2.8.5 8.5 Cas Casing ing Wear earing ing Rin Rings. gs. . . . . . . . . . . . . . 503-2.8.6 5032.8.6 Pump Lubri Lubricatio cation n Main Maintenan tenance. ce. . . . . . . . . 503-2.8.7 5032.8.7 OilOil-Lubr Lubricate icated d Sleev Sleevee Beari Bearings. ngs. . . . . . . . . 503-2. 503 -2.8.8 8.8 Th Thrus rustt Bea Bearin rings. gs. . . . . . . . . . . . . . . . . . 503-2.8.9 5032.8.9 Inte Internal rnal Water ater-Lub -Lubricat ricated ed Sleeve Sleeve Beari Bearings. ngs. . . 503-2. 503 -2.8.1 8.10 0 Coo Coolin ling g Wate aterr. . . . . . . . . . . . . . . . . . . 503-2. 503 -2.8.1 8.11 1 Car Caree of of Driv Driving ing Uni Units. ts. . . . . . . . . . . . . . 503-2. 503 -2.8.1 8.12 2 Cou Coupli plings ngs.. . . . . . . . . . . . . . . . . . . . . 503-2. 503 -2.8.1 8.12.1 2.1 Ma Maint intena enance nce.. . . . . . . . . . . . . 503-2.8.1 5032.8.12.2 2.2 NonNon-Lubr Lubricate icated d Couplin Couplings gs on on Main Main 503-2. 503 -2.8.1 8.12.3 2.3 Lu Lubri bricat cation ion.. . . . . . . . . . . . . 503-2. 503 -2.8.1 8.12.4 2.4 Im Imbal balanc ance. e. . . . . . . . . . . . . .

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2-18 2-19 2-19

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2-19 2-20 2-20 2-20 2-21 2-21 2-21 2-21 2-22 2-22 2-23 2-23 2-23 2-24 2-24 2-24 2-25 2-25 2-25

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2-25 2-25 2-25 2-26 2-26 2-26 2-26 2-27 2-27 2-27 2-27 2-28 2-28 2-28 2-28 2-28 2-29





























S9086-RH-STM-010


Chapter/Paragraph

Page

503-2. 503 -2.9.5 9.5

Oversp Ove rspeed eed Trip rips. s.

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2-30

503-2.10 503-2 .10 PUMP PRESS PRESSURE-R URE-REGUL EGULA ATING GOVE GOVERNORS RNORS.. . . . . . . . . . . . . . . . . . . 503-2. 503 -2.10. 10.2 2 Low Suc Suctio tion n Press Pressure ure Tr Trips ips.. . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-30 2-30

503-2. 503 -2.11 11

2-30

TESTS TE STS AND INS INSPEC PECTIO TIONS. NS.

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503-2. 503 -2.12 12 REP REPAIR AIRS. S. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 503-2. 503 -2.12. 12.1 1 Gen Genera erall Gui Guidan dance. ce. . . . . . . . . . . . . . . . . . . . . . . . . 503-2. 503 -2.12. 12.2 2 Ass Assem embly bly Dra Drawin wings. gs. . . . . . . . . . . . . . . . . . . . . . . 503-2. 503 -2.12. 12.3 3 Wear earing ing Par Parts. ts. . . . . . . . . . . . . . . . . . . . . . . . . . . 503-2. 503 -2.12. 12.3.1 3.1 Cas Casing ing Rin Rings. gs. . . . . . . . . . . . . . . . . . . . 503-2. 503 -2.12. 12.3.2 3.2 Sha Shaft ft Sle Sleeve eves. s. . . . . . . . . . . . . . . . . . . . 503-2. 503 -2.12. 12.3.3 3.3 Sle Sleeve eve Bea Bearin rings gs.. . . . . . . . . . . . . . . . . . . 503-2. 503 -2.12. 12.3.4 3.4 Bus Bushin hings gs.. . . . . . . . . . . . . . . . . . . . . . . 503-2. 503 -2.12. 12.4 4 Ins Inspec pectio tion n and Repa Repair ir of Pump Pump Parts Parts.. . . . . . . . . . . . . . 503-2. 503 -2.12. 12.4.1 4.1 Ins Inspec pectio tion n of Pum Pump p Parts Parts.. . . . . . . . . . . . . . 503-2. 503 -2.12. 12.4.2 4.2 Rep Repair air of Pum Pump p Par Parts. ts. . . . . . . . . . . . . . . . 503-2.12. 5032.12.4.3 4.3 Emer Emergency gency Rebab Rebabbitt bitting ing of Small Beari Bearings ngs . . . 503-2.12.5 503-2 .12.5 Pump Repai Repairs rs Using Using Epoxy Epoxy-Based -Based (Poly (Polymeri meric) c) Compoun Compounds. ds. 503-2.12. 5032.12.5.1 5.1 Limi Limited ted Use of Polym Polymeric eric Repai Repairs. rs. . . . . . . . . 503-2.12. 5032.12.5.2 5.2 Polym Polymeric eric Comp Compound ound Selec Selection tion.. . . . . . . . . . 503-2.12. 5032.12.5.3 5.3 Pump repai repairr with with Polym Polymeric eric Comp Compound ounds. s. . . . . 503-2. 503 -2.12. 12.6 6 Imp Impell eller er Cen Center tering ing.. . . . . . . . . . . . . . . . . . . . . . . . 503-2. 503 -2.12. 12.7 7 Ali Aligni gning ng Pum Pump. p. . . . . . . . . . . . . . . . . . . . . . . . . . 503-2.12. 5032.12.7.1 7.1 Close Close-Cou -Coupled pled Pump Alig Alignmen nment. t. . . . . . . . . . 503-2. 503 -2.12. 12.8 8 Bal Balanc ancing ing.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 503-2.12.9 503-2 .12.9 Comp Composit ositee Material Material Centr Centrifuga ifugall Pump Pump Compone Components. nts. . . . . . 503-2.12. 5032.12.9.1 9.1 Prohi Prohibite bited d Syste Systems. ms. . . . . . . . . . . . . . . . . 503-2.12. 5032.12.9.2 9.2 Auth Authorize orized d Syste Systems. ms. . . . . . . . . . . . . . . . . 503-2.12. 5032.12.9.3 9.3 Main Maintenan tenance ce Phil Philosop osophy hy.. . . . . . . . . . . . . .

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2-31 2-31 2-31 2-31 2-32 2-32 2-32 2-32 2-32 2-32 2-33 2-34 2-34 2-34 2-34 2-34 2-35 2-35 2-35 2-37 2-38 2-38 2-38 2-38





























S9086-RH-STM-010


Chapter/Paragraph

Page 503-3.4.2 5033.4.2.1 .1

Rotary Pump Rotary Pump Class Classificat ification ion By Rotor Rotor Type. . 503-3. 503 -3.4.2 4.2.1. .1.1 1 Timin Ti ming g Gea Gears. rs. . . . . . . . 503-3.4.2.2 503-3 .4.2.2 Othe Otherr Rotar Rotary y Pump Clas Classifica sification tions. s. . . . . . 503-3. 503 -3.4.3 4.3 Ser Servic vicee Ap Appli plicat cation ion.. . . . . . . . . . . . . . . . . . . . . . 503-3. 503 -3.4.3 4.3.1 .1 Fue Fuell Ser Servic vices es - Cle Clean. an. . . . . . . . . . . . . . 503-3. 503 -3.4.3 4.3.2 .2 Fue Fuell Servi Services ces - Contam Contamina inated ted.. . . . . . . . . 503-3. 503 -3.4.3 4.3.3 .3 Lu Lubri bricat cating ing Oil Pum Pumps ps.. . . . . . . . . . . . . 503-3.4.3.4 503-3 .4.3.4 Heav Heavily ily Cont Contamin aminated ated Seawa Seawater ter.. . . . . . . . 503-3.5 5033.5 ROT ROTAR ARY Y PUMP CHAR CHARACTE ACTERISTIC RISTICS. S. . 503-3.5.1 5033.5.1 Gene General ral Charac Characteri teristics stics.. . . . . . . 503-3. 503 -3.5.2 5.2 Di Displ splace aceme ment. nt. . . . . . . . . . . . 503-3. 503 -3.5.3 5.3 Cap Capaci acity ty.. . . . . . . . . . . . . . . 50350 3-3. 3.5. 5.3. 3.1 1 Sl Slip ip.. . . . . . . . . . . 503-3. 503 -3.5.3 5.3.2 .2 Inl Inlet et Con Condit dition ions. s. . . . 503-3. 503 -3.5.4 5.4 Hi High gh Suc Suctio tion n Lift Lift Ef Effec fect. t. . . . . . 503-3. 503 -3.5.5 5.5 En Entra traine ined d Gas Ef Effec fect. t. . . . . . . . 503-3. 503 -3.5.6 5.6 Di Disso ssolve lved d Gas Ef Effec fect. t. . . . . . . . 503-3.5.7 5033.5.7 Visco iscosity sity Ef Effect. fect. . . . . . . . . . . 503-3. 503 -3.5.8 5.8 Bea Bearin rings. gs. . . . . . . . . . . . . . . 503-3. 503 -3.5.9 5.9 Gl Gland and Sea Sealin ling. g. . . . . . . . . . . .

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3-4 3-5 3-6 3-6 3-6 3-6 3-6 3-6

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3-6 3-6 3-7 3-7 3-7 3-7 3-7 3-8 3-8 3-9 3-10 3-11

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3-11 3-11

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3-11 3-11 3-11 3-11 3-11

503-3. 503 -3.6 6 APP APPLIC LICA ATIO TIONS. NS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 503-3. 503 -3.6.1 6.1 Fue Fuell Ser Servic viceses-Cle Clean. an. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 503-3.6.1 5033.6.1.1 .1 Boil Boiler er Fuel Fuel Service Service Pumps Pumps - Steam Tu Turbin rbinee Driven Driven Ship Ship Classes. . . . . . . . . . . . . . . . . . . . . . . . . . . . 503.3.6.1.2 503.3 .6.1.2 Fuel Servi Service ce Pumps Pumps - Gas Tu Turbin rbinee Ship Ship Classes Classes.. . . . . . . 503-3.6.1.3 503-3 .6.1.3 In-Po In-Port rt Fuel Servi Service ce Pumps Pumps - Steam Steam Turbin Turbinee Driven Driven Ships. Ships. 503-3. 503 -3.6.1 6.1.4 .4 Die Diesel sel Oil Ser Servic vicee Pumps Pumps.. . . . . . . . . . . . . . . . . . . 503-3. 503 -3.6.1 6.1.5 .5 JPJP-5 5 Ser Servic vicee Pum Pumps. ps. . . . . . . . . . . . . . . . . . . . . . .

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S9086-RH-STM-010


Chapter/Paragraph

Page

503-3.8 5033.8 TROU TROUBLESH BLESHOOTI OOTING NG ROT ROTAR ARY Y PUMPS PUMPS.. . . . . . . 503-3. 503 -3.8.1 8.1 No Liq Liquid uid Del Delive ivered red.. . . . . . . . . . . . . . . 503-3. 503 -3.8.2 8.2 Low Cap Capaci acity ty.. . . . . . . . . . . . . . . . . . . 503-3. 503 -3.8.3 8.3 Los Losss of Suc Suctio tion. n. . . . . . . . . . . . . . . . . . 503-3. 503 -3.8.4 8.4 Exc Excess essive ive Pow Power er Req Requi uired red.. . . . . . . . . . . . 503-3. 503 -3.8.5 8.5 Vibr ibrati ation on or Noi Noise. se. . . . . . . . . . . . . . . . 503-3.8.6 5033.8.6 Pump Wears Rapi Rapidly dly.. . . . . . . . . . . . . . . 503-3. 503 -3.8.7 8.7 Sho Short rt Life Life of Mecha Mechani nical cal Seals Seals and and Packin Packing. g. . 503-3. 503 -3.8.8 8.8 Sho Short rt Lif Lifee of Bea Bearin rings. gs. . . . . . . . . . . . . . 503-3. 503 -3.8.9 8.9 Ove Overhe rheati ating ng and Sei Seizin zing. g. . . . . . . . . . . . . 503-3. 503 -3.8.1 8.10 0 Suc Suctio tion n Line Line Vapo Vaporr Lock. Lock. . . . . . . . . . . .

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3-13 3-13 3-14 3-14 3-15 3-15 3-15 3-16 3-16 3-16 3-17

503-3. 503 -3.9 9 MA MAINT INTEN ENANC ANCE. E. . . . . . . . . . . . . . . . . 503-3. 503 -3.9.1 9.1 Gen Genera erall Gui Guidan dance. ce. . . . . . . . . . . . . 503-3.9.2 5033.9.2 Usin Using g Techn echnical ical Manu Manuals. als. . . . . . . . 503-3. 503 -3.9.3 9.3 Wear earing ing Pla Plates tes and Lin Liners ers.. . . . . . . . 503-3. 503 -3.9.4 9.4 Thr Thrust ust Bea Bearin rings. gs. . . . . . . . . . . . . . 503-3. 503 -3.9.5 9.5 Ti Timin ming g Gea Gears. rs. . . . . . . . . . . . . . . 503-3. 503 -3.9.6 9.6 Mot Motors ors and Con Contro trolle llers. rs. . . . . . . . . . 503-3. 503 -3.9.7 9.7 Tu Turbi rbines nes.. . . . . . . . . . . . . . . . . . 503-3.9.8 5033.9.8 Pump Press Pressure-R ure-Regul egulating ating Gove Governors rnors.. . 503-3. 503 -3.9.9 9.9 Test estss and and Ins Inspec pectio tions ns.. . . . . . . . . . .

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3-17 3-17 3-17 3-17 3-18 3-18 3-18 3-18 3-18 3-18

503-3. 503 -3.10 10 OV OVERH ERHAUL AUL OR REP REPAIR AIR.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 503-3. 503 -3.10. 10.1 1 Ass Assem embly bly Dra Drawin wings. gs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 503-3.10.2 503-3 .10.2 Renew Renewing ing Wearin earing g Plates Plates and Line Liners. rs. . . . . . . . . . . . . . . . . . . . . . .

3-19 3-19 3-19

SECTION 4

RECIPR REC IPROCA OCATIN TING G PUM PUMPS PS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-1

503-4.1 5034.1

RECIPROCA RECIP ROCATING TING PUMP SAFET SAFETY Y PRECA PRECAUTIO UTIONS. NS. . . . . . . . . . . . . . . . . .

4-1

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S9086-RH-STM-010


Chapter/Paragraph

Page

503-5. 503 -5.1 1

GENERA GEN ERAL L DES DESCRI CRIPTI PTION. ON.

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5-1

503-5. 503 -5.2 2

TERMI TER MINOL NOLOGY OGY.

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5-1

503-5. 503 -5.3 3 ME MECHA CHANIC NICAL AL SEA SEALS. LS. . . . . . . . . . . . . . . . 503-5. 503 -5.3.1 3.1 Bas Basic ic Con Constr struct uction ion.. . . . . . . . . . . . . . . 503-5. 503 -5.3.2 3.2 Sea Seall Ope Operat ration ion.. . . . . . . . . . . . . . . . . 503-5. 503 -5.3.3 3.3 Me Mecha chanic nical al Seal Sealss vs. vs. Packi Packing. ng. . . . . . . . . 503-5.3.4 5035.3.4 Press Pressure ure Break Breakdown down Devic Devices. es. . . . . . . . . 503-5. 503 -5.3.5 3.5 Cyc Cyclon lonee Sep Separa arator tors. s. . . . . . . . . . . . . . . 503-5. 503 -5.3.6 3.6 Des Design ign and Mat Materi erials als.. . . . . . . . . . . . . . 503-5. 503 -5.3.7 3.7 Ax Axial ial Pos Positi ition oning ing.. . . . . . . . . . . . . . . . 503-5.3.8 5035.3.8 Leak Leakage age and Repla Replacemen cementt Crite Criteria. ria. . . . . . 503-5.3.8 5035.3.8.1 .1 NonNon-Flam Flammabl mablee Liqu Liquids. ids. . . . . 503-5 50 3-5.3. .3.8.2 8.2 Fla Flamm mmabl ablee Li Liqui quids. ds. . . . . . . . 503-5 50 3-5.3. .3.8.3 8.3 Sew Sewage age Pum Pump p Lea Leakag kage. e. . . . . . 503-5.3.9 5035.3.9 Inst Installat allation ion of Mech Mechanica anicall Seals Seals.. . . . . . . . 503-5 50 3-5.3. .3.9.1 9.1 Cle Cleanl anline iness. ss. . . . . . . . . . . . . 503-5 50 3-5.3. .3.9.2 9.2 Bur Burrs rs and Sha Sharp rp Edg Edges. es. . . . . . 503-5 50 3-5.3. .3.9.3 9.3 O-R O-Ring ing Fit Fits. s. . . . . . . . . . . . 503-5.3.9 5035.3.9.4 .4 Lubr Lubricati ication on of Secon Secondary dary Seal. . 503-5 50 3-5.3. .3.9.5 9.5 Lub Lubric ricati ation on of Sea Seall Face Faces. s. . . . 503-5 50 3-5.3. .3.9.6 9.6 Sea Seatin ting g of Sea Seall Face Faces. s. . . . . . . 503-5 50 3-5.3. .3.9.7 9.7 Ali Alignm gnment ent.. . . . . . . . . . . . . 503-5.3.9 5035.3.9.8 .8 Glan Gland d Plate Torqui orquing. ng. . . . . . . 503-5.3.9 5035.3.9.9 .9 Fill Filling ing and Venti enting. ng. . . . . . . .

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5-2 5-2 5-5 5-5 5-5 5-5 5-5 5-5 5-6 5-6 5-6 5-6 5-7 5-7 5-7 5-7 5-7 5-8 5-8 5-8 5-8 5-8

503-5. 503 -5.4 4 PACK ACKED ED STU STUFFI FFING NG BOX BOXES. ES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 503-5.4.3 5035.4.3 Leak Leakage age and Repla Replacemen cementt Crite Criteria. ria. . . . . . . . . . . . . . . . . . . . . . . . 503-5.4.3 5035.4.3.1 .1 NonNon-Flam Flammabl mablee Liqu Liquids. ids. . . . . . . . . . . . . . . . . . . . . . . 503-5 50 3-5.4. .4.3.2 3.2 Fla Flamm mmabl ablee Li Liqui quids. ds.

5-8 5-9 5-9 5-10





























S9086-RH-STM-010


Chapter/Paragraph

Page

503-6.6.1 503-6. 6.1.1 .1 HOT AL ALIGN IGNME MENT NT CHE CHECK. CK. . . . . . . . . . . . . . . . . . . . 503-6. 503 -6.6.2 6.2 RIM AN AND D FACE FACE MET METHOD HOD.. . . . . . . . . . . . . . . . . . . . . . . . . . . 503-6.6.3 5036.6.3 STRAI STRAIGHT GHT EDGE AND THICK THICKNESS NESS GAUG GAUGE E METHOD METHOD.. . . . . . . . . .

6-4 6-5 6-5

A

0-0

Techni echnical cal Manual Defici Deficiency/E ency/Evaluati valuation on Report Report (TMDER (TMDER))

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S9086-RH-STM-010

LIST OF TABLES

Table

Title

Page

503-2503 -2-1 1

NAVY NA VY FIR FIRE E PUM PUMPS PS H VS Q

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2-16

503-2503 -2-2. 2.

Pump Pum p Mini Minimu mum m Per Perfor forman mance ce . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-19

503-2-3. 5032-3.

Centrifug Centr ifugal al Pump Pump Sleeve Sleeve Bearing Bearing Cleara Clearances nces (Whi (White te Metal) Metal) . . . . . . . . . . . . . .

2-28































S9086-RH-STM-010

LIST OF ILLUS ILLUSTRATI TRATIONS ONS

Figure

Title

Page

503-2-1. 5032-1.

Centrifug Cent rifugal al Pump Pump Types Types by Mechan Mechanical ical Config Configurati uration. on. . . . . . . . . . . . . . . . . .

2-3

503-2-2. 5032-2.

Hydrauli Hydr aulicc Geometr Geometry y of Cent Centrifug rifugal al Pump Pump Impell Impellers. ers. . . . . . . . . . . . . . . . . . .

2-4

503-2-3. 5032-3.

Volut olutee Centr Centrifug ifugal al Pump Pump..

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2-5

503-2-4. 5032-4.

Diffusi Dif fusion on Centr Centrifug ifugal al Pump Pump.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-6

503-2-5. 5032-5.

Typica ypicall Centri Centrifugal fugal Pump Chara Characteri cteristic stic Curve . . . . . . . . . . . . . . . . . . . . .

2-8

503-2503 -2-6. 6.

Character Charac terist istic ic Curve Curve of a Con Conden densat satee Pum Pump p tha thatt Opera Operates tes Almo Almost st Contin Continuou uously sly in Cavitation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-10

503-2503 -2-7. 7.

Fricti Fri ction on - Head Head and and Curve Curve Syste System m - Head Head Curve Curve . . . . . . . . . . . . . . . . . . . .

2-11

503-2-8. 5032-8.

Pump H-Q Curve Curve Supe Superimp rimposed osed on System System - Head Head Curve. Curve.

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2-11

503-2-9. 5032-9.

Varyin arying g Pump Pump Capacity Capacity by Varyi Varying ng Speed. Speed.

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2-12

503-2-10. 503-2 -10.

Varyin arying g Pump Pump Capac Capacity ity by Thro Throttli ttling. ng. . . . . . . . . . . . . . . . . . . . . . . . . . .

2-12

503-2503 -2-1 11.

Opera Op eratio tion n of Two Two Pump Pumpss in Seri Series es . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-13

503-2503 -2-12. 12.

Opera Op eratio tion n of Two Two Pump Pumpss in Paral Parallel lel.. . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-13































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S9086-RH-STM-010

CHAPTER CHAPTE R 503 PUMPS SECTION 1 SAFETY 503-1.1 5031.1

SAFETY SAF ETY PRE PRECAU CAUTIO TIONS NS

Operation of centrifugal and positive displacement pumps can be hazardous to both personnel and equipment unless appropriate safety precautions are taken. The general safety precautions related to the operation, maintenance and repair of centrifugal, rotary and reciprocating pumps are listed in the beginning of Section of Section 2, 2, Section 3, and Section 4, 4, respectively. These safety precautions are generic in nature and should not be considered all encomp enc ompass assing ing.. A tho thorou rough gh kno knowle wledge dge of and adh adheren erence ce to the req requir uireme ements nts of tho those se doc docume uments nts cit cited ed in paragraph 503-1.1.1 are 503-1.1.1 are required to prevent personnel injury or equipment damage. 503-1.1.1 5031.1.1 Safety References: References: a. General General safety requirements requirements and precautions precautions can be located in the following following references references (List (Listed ed in orde orderr of precedence): 1. Navy Safety Precautions for Forces Afloat (OPNAVINST (OPNAVINST 5200.19) 2. Gener General al Specifications Specifications For Ships Of The United States States Navy Navy,, Secti Section on 503 - Pump Pumpss 3. Gener General al Speci Specificati fications ons for Overh Overhaul aul of Surfa

Ship (GSO) (GSO),S9AA ,S9AAO-AB O-AB-GOS-GOS-010, 010, Section 503

Pump































1-2

































S9086-RH-STM-010

SECTION 2 CENTRIFUGAL PUMPS 503-2.1

CENTRIFUGA CENTR IFUGAL L PUMP PUMP SAFETY SAFETY PRECA PRECAUTION UTIONS. S.

The following safety measures must be followed exactly to minimize hazards to personnel and equipment while operating centrifugal pumps: a. If relief valves are fitted, ensure ensure that they func function tion at designated designated pressure. pressure. b. Ensu Ensure re that the stea steam m valve to the turbine turbine is clos closed ed when attempting attempting to jack a pump by hand. c. Boiler Boiler feed syst system em pumps shall not be used for purp purposes oses other than those those connected with boiler boiler or feedw feedwater ater service.































S9086-RH-STM-010

a. Bearin Bearing g A beari bearing ng is a part which which suppor supports ts or positi positions ons the the shafts shafts on which which a rotor is mount mounted. ed. A bea bearin ring g may be internal (bearing being lubricated by the liquid being pumped) or external (bearing isolated from the liquid being pumped). The bearings may be either an anti-friction (roller or ball bearing) or fluid film type (sleeve and journal). b. Bea Bearin ring g Bushing Bushing

The remov removabl ablee portion portion of a sleeve sleeve beari bearing ng in contac contactt with the the journal journal..

c. Bea Bearin ring g Housi Housing ng

A bod body y in whi which ch the the bear bearing ing is moun mounted ted..

d. Casin Casing g

The portion portion of the pump pump which which includ includes es the impel impeller ler chambe chamberr and volute volute or or diffuser diffuser..

e. Casing Casing Wearin Wearing g Ring A statio stationary nary replace replaceable able ring ring to protect protect the the casing casing at a running running fit with with the impell impeller er.. Wearing rings provide an easily and economically renewable leakage joint between the impeller and the casing. Wear occurs due to pressure differential across the leakage joint. f.

Cyclone Separato Cyclone Separatorr A mechan mechanical ical devic devicee designed designed to to eliminat eliminatee foreign foreign matter matter from from the the seawater seawater (seal (seal flushflushing water) supplied to the mechanical seal faces. The device is integrally connected to the pump through tub-































S9086-RH-STM-010

t.

Stuffing Box Stuff Box A porti portion on of the the pump pump casing casing throug through h which which the shaf shaftt extends extends and and in which which a mech mechanica anicall seal or packing and a gland may be placed to prevent leakage. ″

″

u. Stuf Stuffing Box Box,, Aux Auxili iliary ary Als Also o call called ed a Back-up Back-up Stuffing Box. A recessed portion of the gland and cover of a mechanical seal sub-assembly designed to accommodate two or more rings of emergency backup packing. v. Throat Throat Bushin Bushing g A renewa renewable ble linin lining g for a pum pump p casing casing at a sha shaft ft penetra penetratio tion n or thr throat oat.. Its purpose purpose is to: provide a solid surface against which packing seats, provide a fairly tight clearance to the rotating shaft sleeve so the packing doesn’t extrude into the fluid system through the bushing-to-shaft sleeve gap, and be replaceable in case the tight clearance opens up due to wear. 503-2.4

CENTRIFUGA CENTR IFUGAL L PUMP TYPES.































S9086-RH-STM-010

Figure 503-2-2. Hydraulic Geometry of Centrifugal Pump Pump Impellers. a. Radial Radial Flow The liquid liquid enters enters the impell impeller er axially axially at the hub hub and flows radial radially ly to the periph periphery ery.. This type type of impeller develops pressure principally by the action of centrifugal force. These impellers usually have a specific speed below 4200 for single suction impellers and below 6000 for double suction impellers. Radial flow pumps produce a low flow rate capacity at a high head.































S9086-RH-STM-010

The rotor consists of a series of blades projecting from a hollow cylindrical hub through which the shaft has been pressed. The blades are shrouded at the sides and thus form a series of chambers. The pump body (casing) typically has either a circular shape or an elliptical shape. For circular pump casings, the rotor is positioned eccentrically within the circular pump casing. When the rotor is spinning, seal water, located within the casing of the pump, is forced by the centrifugal action of the rotor blades to follow the internal surface of the casing of the pump. By following the contours of the pump casing, the chamber or pocket formed by the blades, the side shrouding, and the sealing water expands as each chamber moves past the inlet or suction port. The expansion of these chambers creates a low pressure area which allows the air in the suction piping to enter the chamber. As the chambers continue around the contours of the pump casing, the chambers compress as they pass the discharge port. This action results in the sealing water acting as a positive displacement piston which hydraulically compresses the air in the rotor chamber.

503-2.4.5 5032.4.5 Canne Canned d Motor Pumps. Pumps.

Canned Canne d motor pumps pumps are close-couple close-coupled d pumps with the motor motor rotor and sta-

































S9086-RH-STM-010































S9086-RH-STM-010

i. Other Other clas classifica sification tions, s, such as special constructio construction, n, dire direction ction of rotation (or reversible), reversible), and kind of power drive.

503-2.6.2 5032.6.2 Servi Service ce Applicati Application. on.

The various various centrifugal centrifugal pumps used in ships have requiremen requirements, ts, and operation, operation,































S9086-RH-STM-010































S9086-RH-STM-010

H = total head in feet of liquid. sg = specific gravity. or































S9086-RH-STM-010

result from improper pump design, excessive suction lift, improper pump selection for the specific suction conditions, and improper suction piping arrangement. Cavitation results in pump noise and vibration, reduced capacity and efficiency, and pitting of pump parts, especially the impeller. Cavitation damage is characterized by pitting on the back side of the impeller vane and on the inside of the back shroud, downstream of the suction edge of the vane. Where cavitation cannot be avoided, special materials resistant to cavitation pitting must be used for













































































































































































































































































































































































































































































































































































































































































































































































































































































S9086-RH-STM-010

503-3.4.2.2 503-3.4.2 .2 Other Rotary Rotary Pump Classific Classification ations. s. Rotar Rotary y pumps are also classifie classified d by their shaft positio position n or orientation (horizontal, vertical, or inclined) and by power types (motor or turbine driven). 503-3.4.3 503-3. 4.3 Ser Servic vicee App Applic licati ation. on. Rot Rotary ary pum pumps ps are use used d in the naval ser servic vicee for the these se pri princi ncipal pal app applic licati ations ons (which are discussed in paragraph 503-3.6). 503-3.6). 503-3.4.3 5033.4.3.1 .1 Fuel Services Services - Clean Clean.. a. Main Fuel Service Service - Steam Turbine Turbine Driven Driven Ships b. Fuel Booster Booster Service - Gas Turbine Turbine Driven Driven Ships c. Port Fuel Service Service - Steam Turbin Turbinee Driven Ships d. Diese Diesell Oil Service Service e. JPJP-5 5 Service Service 503-3.4.3 5033.4.3.2 .2 Fuel Services - Cont Contamin aminated. ated. a. Fuel Strip Stripping ping b. Fuel Transf Transfer er c. Carg Cargo o Stripping Stripping d. JP-5 Transf Transfer er e. JP-5 Strip Stripping ping 503-3.4.3.3 Lubricating Oil Pumps. 503-3.4.3.4 Heavily Contaminated Seawater. Seawater. a. Oily Wastewater Wastewater Transfer Transfer b. Bilge Strippi Stripping ng 503-3.5

ROTAR ROT ARY Y PUMP PUMP CHAR CHARACTER ACTERISTIC ISTICS. S.

503-3.5.1 Gene 503-3.5.1 General ral Characteris Characteristics tics.. Rotar Rotary y pumps are a positive positive displacemen displacementt type whose capacitie capacitiess are directly proportional to pump speed subject to capacity losses as discussed in paragraph 503-3.5.2 through paragraph 503-3.5.9. Rotary pump pressure developed is equivalent to that imposed by resistance of the system to which it discharges. The pressure capability of the pump is generally only limited by the pump casing bursting strength



























S9086-RH-STM-010

a. Good for handling handling high viscosity viscosity fluids b. Self priming priming ″

c. Can produce produce suction suction lifts from 20-25 20-25 Hg d. Can be dire directly ctly driven driven by elect electric ric motors motors (but must be gear driven from a steam turbine) turbine) e. Requi Require re low maintenan maintenance ce f. Are relatively relatively compact compact Disadvanta Disadvantages: ges: a. Opera Operate te at a constant capacity capacity for for a give given n RPM b. Requi Require re an auxiliary auxiliary press pressure ure regulating regulating device or relie relieff valv valvee to prevent excessive excessive pressures c. Requi Require re that close tolerances tolerances be maintained maintained between pumping pumping elements elements and the casing d. Canno Cannott operate at shutoff shutoff e. Requi Require re a cons constant tant supply supply of lubri lubricatio cation n from the fluid being being pumped f. Canno Cannott handle handle gritty gritty fluids 503-3.5.2 Disp 503-3.5.2 Displacem lacement. ent. Rotar Rotary y pump displacement displacement is the volume that the rotating rotating elements displace displace during during each rotor shaft revolution. Displacement is independent of all operating conditions and is a theoretical capacity (assuming complete filling of the pumping spaces and no internal recirculation losses). 503-3.5.3 Capaci 503-3.5.3 Capacity ty.. Rotar Rotary y pump capacity capacity is the quantity quantity of fluid actually actually delivered delivered under under specified specified conditions. conditions. Capacity is equal to the displacement times the revolutions per minute minus losses due to slip or inlet conditions. The ratio of the actual capacity to the displacement expressed in percent, is known as the pump’s volumetric efficiency. 503-3.5.3.1 503-3.5.3 .1 Slip Slip.. Slip is the quantit quantity y of fluid that bypasses bypasses from dischar discharge ge to suction suction through through the internal internal working pump clearance. Slip varies directly with pressure and inversely with viscosity. 503-3.5.3.2 503-3.5.3 .2 Inlet Conditi Conditions. ons. Fluid condit conditions ions at the pump pump suction suction are important important to the pump perform performance, ance, and include suction pressure or lift, viscosity, operating temperature, vapor pressure, and the amount of entrained or dissolved air or gas. Capacity losses resulting from inlet conditions which do not permit complete pumping element filling are not considered to be slip. 503-3.5.4 High Suction 503-3.5.4 Suction Lift Effect. Effect. Rota Rotary ry pumps in like new condition condition will lift oil, as well as reciprocatin reciprocating g pumps. The volumetric efficiency will drop off rapidly if the pump is required to operate on a vacuum or suction lift exceeding that for which it is designed. This is due to the effects of cavitation. Figure 503-3-2 is 503-3-2 is a representative curve showing a typical rotary pump’s drop in volumetric efficiency. Different designs will display unique



























S9086-RH-STM-010

Figure 503-3-2. Contrasting Capacity Capacity Curves. 503-3.5.5 Entr 503-3.5.5 Entrained ained Gas Effect. Effect. Most liquids liquids are susceptib susceptible le to air or gas entrainme entrainment nt (the trapping trapping of bubbles bubbles in the liquid). Air entrainment is common in systems where recirculation occurs and the liquid is exposed to air through throu gh eithe eitherr mech mechanica anicall agit agitatio ation, n, leaks leaks,, or impr improperl operly y locat located ed drain lines. Entrained Entrained air or gas in liqu liquids ids handled by rotary pumps has an effect on pump performance, both mechanically and hydraulically, especially where negative inlet pressure (suction lift condition) exists. When the inlet pressure is below atmospheric pressure, entrained gas in the fluid will expand and take up a larger part of the pump displa cement, thereby reducing its liquid capacity. The effect of entrained gas on liquid displacement is shown in Figure 503-3-4. 503-3-4. If the entrained air or gases is a large percentage of the volume handled, there may be noise and vibration, loss of liquid capacity, and pressure pulsations. The pulsation frequency depends on the speed and number of closures in the rotor element during each revolution. Main reduction gear lube oil pumps are particularly susceptible to air entrainment.



























S9086-RH-STM-010

illustrated in Figure 503-3-3. 503-3-3.

Figuree 503-3 Figur 503-3-3. -3. Ef Effect fect of Diss Dissolved olved Gas on Liqu Liquid id Disp Displacem lacement. ent.

503-3.5.7 Visco 503-3.5.7 iscosity sity Effect. Effect. Visco iscosity sity is the internal internal resistance resistance of a fluid to a shear shearing ing stress, stress, or more simply, simply, it can be thought of as the fluid’s resistance to flow. It can be measured in a variety of units. In most liquids handled by shipboard pumps, the viscosity decreases with an increase in temperature. The effect of an increase in the viscosity of a fluid on a pump is that it will increase the mechanical pump losses, reduce the pump efficiency, and result in an increase in the power required to pump the fluid at the same flow rate.



























S9086-RH-STM-010

Figure Figu re 503503-3-4 3-4 Ef Effect fect of Entra Entrained ined Gas on Liqu Liquid id Disp Displacem lacement. ent. Viscosity is measured either as a dynamic (absolute) or kinematic parameter. The difference between these two parameters is a factor of the mass density of the fluid. The units for the measurement of dynamic viscosity are Pound Seconds per Square Foot (English) or Centi-Poise (Metric). The units for the measurement of kinematic viscosity are Square Feet per Second (English) or Centi-Stoke (cSt, Metric). Other arbitrary units for the measureme meas urement nt of kine kinemati maticc visc viscosit osity y exis exist. t. Thes Thesee are: Secon Seconds ds Saybo Saybolt lt Univ Universal ersal (SSU) and Secon Seconds ds Sayb Saybolt olt Furol (SSF). The following relationships/conversions exist: cSt = 2.240 SSF - 184/SSF (SSF = 25 to 40) cSt = 2.160 SSF - 60/SSF (SSF> 40) cSt = 0.226 SSU - 195/SSU (SSU< or = 100) cSt = 0.220 SSU - 130/SSU (SSU> 100) The major effects of a change in viscosity are: a. Slip Slip wil willl inc increa rease se wit with h a dec decrea rease se in viscosit viscosity y. In som somee cas cases es the manufac manufactur turer er wil willl dow down n rat ratee a pum pump p for pumping oils at less than 100 SSU. b. As the viscosity of the pumped fluid increases, the mechanical losses increase, the pump effici efficiency ency decreases, and the pumping power requirement increases. c. It may be necessary necessary to slow a pump when pumping pumping highly highly viscous fluids to prevent overloadin overloading g the driv driver er and to permit sufficient time for the fluid to flow into the pumping elements of the pump (prevent cavitation).





























S9086-RH-STM-010

in pumps in fuel service must be carefully installed to prevent leakage (see Section 5). 5). Internal bearings are located between the rotor elements and the packing and depend on the pumped fluid for lubrication. Internal bearings are not suitable for pumps handling fluids containing abrasives or having low viscosity (lacking lubricity). 503-3.5.9 Gland Sealing 503-3.5.9 Sealing.. If pumps pumps are required required to take suction suction at lower than than atmospheric atmospheric pressur pressuree and have a packed stuffing box, it is important that the shaft stuffing boxes be fitted with a lantern ring and sealed by the pumped fluid (see Section 5). 5). These precautions prevent entrance of air into the pump. Stuffing box gland sealing fluid is taken from the pump discharge. 503-3.6

APPLICA APPLIC ATION TIONS. S.

503-3.6.1 Fuel Services-Cl 503-3.6.1 Services-Clean. ean. Clean Navy Distillat Distillatee Fuel per MIL-F-16884 MIL-F-16884 (NATO, (NATO, F-76) or JP-5, MIL-TMIL-T5624 (NATO, F-44) is to be provided to the ships boilers, diesel engines, diesel generators, gas turbine propulsion engines, gas turbine generators and aircraft refueling stations. This is accomplished through the use of rotary positive displacement pumps. Most of those in use are MIL-P-19131 Type II, III, X, or XI. The fuel viscosity range is from 32 Saybolt Second Universal (SSU) to 1500 SSU. Specific services are detailed in the following sub-paragraphs: 503-3.6.1 503-3. 6.1.1 .1 Boi Boiler ler Fuel Ser Servic vicee Pum Pumps ps - Ste Steam am Turbin Turbinee Dri Driven ven Ship Classes. Classes. Two ste steam, am, turbine turbine dri driven ven or motor driven two-speed screw type pumps are typically used in the boiler fuel service system to provide the boiler furnace with clean Diesel Fuel Marine (DFM). These pumps may have to operate at a suction pressure of up to 10 inches and a discharge pressure of up to approximately 350 - 450 psig depending upon the particular plant operating requirements. 503.3.6.1.2 503.3.6.1 .2 Fuel Service Service Pumps - Gas Turbine Turbine Ship Classes. Classes. Ther Theree are typi typicall cally y two motor-driv motor-driven, en, dual (high/ (high/ low) speed, rotary vane, or screw-type Fuel Service Pumps per propulsion plant designed to provide clean fuel to the gas turbine module through a common header to the fuel service heater. These pumps also supply fuel to gravity tanks. Built-in relief valves and a system unloading valve are designed to prevent the pump from over pressurizing the system. 503-3.6.1 5033.6.1.3 .3 In-Po In-Port rt Fuel Service Pumps - Steam Turbin Turbinee Driven Ships.

Two-s wo-speed peed screw-type screw-type (Port/Cru (Port/Cruisin ising) g)





























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ships with compensated fuel systems have been provided with stellite liners to improve reliability. Typically the viscosity range will be from 32 Saybolt Seconds Universal (SSU) to 4000 SSU and the following pumps will be included: 503-3.6.2 503-3. 6.2.1 .1 Fue Fuell Str Stripp ipping ing Pump. Pump. Sli Slidin ding g van vanee (ty (type pe X) pum pumps ps or rot rotary ary screw screw (ty (type pe II) pumps pumps wit with h tim timed ed rotors which prevent metal-to-metal contact are most often used to pump the fuel, sludge, seawater and sediment that are found in the bottom of the fuel tanks. 503-3.6.2.2 503-3.6.2 .2 JP-5 Strippin Stripping g Pump. Elect Electric ric motor motor driven sliding sliding vane vane (type X) pumps pumps or sliding sliding shoe (type XI) pumps are most often used to pump contaminated JP-5 to the JP-5 Stripping Tank or to the JP-5 transfer main through closed locked valves. 503.3.6.2.3 Carg 503.3.6.2.3 Cargo o (F-76 or JP-5) Stripping Stripping Pumps. Pumps. Two electric, electric, motor-driv motor-driven en sliding sliding vane (type X) pumps or sliding shoe (type XI) pumps operating in a suction lift condition are connected in parallel to a common suction header and discharge header. The stripping pump takes suction from the tank stripping manifolds and each JP-5 Pump casing and suction line. They also act as continuous priming pumps for the centrifugal main cargo pumps. 503-3.6.2.4 503-3.6.2 .4 Fuel Transf Transfer er Pump. Rotar Rotary y screw-type screw-type pumps pumps with or without without timing timing gears and sliding sliding vane type type pumps are most often chosen for fuel transfer pumps. These pumps take suction of fuel storage tanks and discharge to fuel service tanks, other fuel storage tanks, or to the deck riser for inter ship transfer. On gas turbine ships with compensated fuel systems, the fuel transfer pump discharges to a fuel oil purifier. 503-3.6.3 5033.6.3 Lubr Lubricati icating ng Oil Pumps. 503-3.6.3.1 503-3.6.3 .1 Main Reductio Reduction n Gear Pumps. The main reduction reduction gear lubricati lubricating ng oil pumps are typically typically vertical vertical screw type pumps with or without timing gears. These pumps may be steam turbine driven, motor driven (two speed), or attached to and driven from the main reduction gear. The standby and emergency lube oil pumps are also of the same design and driven by a two speed motor. The steam turbine driven pumps and the electric motor driven pumps can be operated in both the automatic and manual modes. Motor driven pumps can normally be started and stopped remotely. On some ships there are air driven coast down pumps to provide continuous oil supply to the gears and bearings when there is a loss of electrical power.





























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connections and oily waste holding tanks. The oily waste transfer pump discharges to the oily waste holding tanks or to overboard discharge connections. Typically electric motor-driven sliding shoe pumps are used. 503-3.6.4 503-3. 6.4.2 .2 Bil Bilge ge Str Stripp ipping ing Pumps. Pumps. Bil Bilge ge str stripp ipping ing pumps pumps tak takee a suc suctio tion n fro from m the bilges bilges and dischar discharge ge to overboard connections or oily waste holding tanks. Typically steam reciprocating bilge stripping pumps are used for this service. However new or replacement bilge stripping pumps shall not be steam driven. 503-3.6.4.3 503-3.6.4 .3 Porta Portable ble Oily Waste Waste Transfe Transferr Pumps. Porta Portable ble oily waste transfer transfer pumps are typically typically pneumatic pneumatic powered double diaphragm pumps which take suction directly from bilge wells and discharge to the oily waste holding tanks or overboard connections. 503-3.6.4.4 503-3.6.4 .4 Oil/ Oil/W Water Separator Separator Units. Oil/ Oil/W Water separator separator unit pumps take suction suction from the oily waste holding tank and either draw thro through ugh or disc discharg hargee to the oil/ oil/wate waterr separ separator ator units. The units disc discharg hargee to a oily waste holding tank, waste oil tank, or to an overboard discharge connection. Typically Progressing Cavity (type I) or flexible vane pumps are used for this service. 503-3.6.5 AFFF Service. 503-3.6.5 Service. AFFF pumps pumps take suction suction from AFFF AFFF service service tanks and dischar discharge ge to the AFFF AFFF service system. Typically, sliding vane pumps are used for this service 503-3.7

ROTAR ROT ARY Y PUMP PUMP OPERA OPERATION. TION.

Refer to the Engineering Engineering Operation Operation Seque Sequence nce System (EOSS) or the pump techn technical ical manual for speci specific fic rotary pump preoperation checks, starting procedures, and stopping and securing procedures. Instructions for all pumpss canno pump cannott be cover covered ed here becau because se of the diverse types, designs, designs, and applications applications in the fleet. The applicable applicable technical manual should be studied before any attempt is made to operate or service the unit. The following general caution should be observed. CAUTION

A rotary pump is a positive displacement pump and must not be started against a closed or restricted suction or discharge valve.





























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a. Syste System m valve valvess impr improperl operly y align aligned. ed. Verify Verify valve alignment alignment in accor accordance dance with EOSS. b. Pump suction suction stra strainer iner or filter element element (if installed). installed). Clean as neces necessary sary.. c. Pump casing, casing, suction lines and mechanical mechanical seal or packi packing ng for air leakage into pump casing. casing. d. Check suction suction tank level and ensure pump is properly properly primed. e. Ensure Ensure bypa bypass ss relief valve is properly adjusted adjusted and not being held of offf its seat by foreign matter/debr matter/debris. is. Adjust Adjust the relief valve cracking pressure or clean the debris out as necessary. f. Corre Correct ct pump rotation. rotation. Reverse any two motor leads, if required, required, to corre correct ct rotation. rotation. g. Sucti Suction on lift is too high. Check the suction suction with a vacuu vacuum m gage. Fluid may be vapor vaporizin izing. g. 503-3.8.2 Low Capacity 503-3.8.2 Capacity.. to the following:

If the pump discharge dischargess but does not deliver deliver suff sufficien icientt capacity capacity, the cause may be due

a. Impro Improper per valve alignment. alignment. Verify Verify that the syst system em is alig aligned ned in accor accordance dance with EOSS. b. Pump speed too slow. slow. If mult multiple iple speed motor motor is used used,, ensure that the proper speed has been selected. selected. If a turbine driven unit is used and normal operating steam pressure is available, reset the pressure regulating or speed limiting governor. Determine if the pump driver is requiring excessive power. See paragraph 503-3.8.4. 503-3.8.4. c. Partially Partially plugged plugged sucti suction on line or strai strainer/fi ner/filter lter.. Check pump suction suction stra strainer iner or filter element element (if installed) installed) for blockage. block age. Clean if requi required. red. d. Air leaking leaking into pump casing. Check pump casing, casing, suction lines, lines, and mech mechanica anicall seal or packing gland gland for air leakage. Repair as necessary. e. Low suction suction tank leve level. l. Check suction tank level to ensu ensure re pump is prope properly rly primed. primed. Chang Changee tank suction suction or fill tank to levels above the suction pipe f. Bypass, Bypass, relief, or unloader unloader valve open. open. Check the bypass to ensure ensure it is closed and check check the relief or unloader unloader valve to ensure that it is properly adjusted and not leaking due to foreign matter or debris between the seat and disc. g. Pump rotation rotation is inco incorrect rrect.. Verify Verify the rotational rotational direction, direction, and, if required, required, chang changee any two pump motor motor lead leadss to correct pump rotation.





























S9086-RH-STM-010

503-3.8.4 Exces 503-3.8.4 Excessive sive Power Power Required. Required. If the pump sounds sounds as if it is struggling struggling to meet its demand, demand, or its discharge rate remains low, it may be indicative of an excessive power requirement being placed on the driver. If possible, the power requirements of the pump should be determined by the steam inlet pressure or the motor amperage, as applicable. If an excessive power requirement is determined to exist, then this condition may be due to: a. Mechanica Mechanicall defec defects ts such as a bent shaft, rotor binding, binding, mechanical mechanical seal failu failure re or stuf stufffing box packi packing ng too tight, casing distortions caused by piping connections, foundation misalignment, or internal pump part failure (bearings, timing gears, etc.). b. Suction Suction or disc discharg hargee line liness are obst obstruct ructed. ed. Check pump suction and disch discharge arge pressures. pressures. Verify Verify system valve positions. If time allows record all operating parameters for post operation analysis (to include pump speed, fluid viscosity, fluid temperature, and motor amperage or steam inlet pressure, as appropriate). If unable to determine the cause, place a standby or alternate pump unit on line and secure the affected unit. c. Pump speed is too high. If poss possible, ible, reduce reduce mot motor or speed by press pressing ing low speed switch or adjusting adjusting pressure regulating or the speed limiting governor on steam powered units. d. Flui Fluid d bein being g pumped is (cold (cold)) heavi heavier er or more viscous viscous than specified. Reduce Reduce pump speed. speed. 503-3.8.5 5033.8.5 Vibrat ibration ion or Noise. Noise.

Excessiv Exce ssivee pump noise noise or vibration vibration may be due to the following: following:

a. Pump foundation foundation or resilient resilient mount bolts are loos loose. e. Correct if neces necessary sary.. b. Mechanica Mechanicall defec defects ts such as misalignment misalignment,, beari bearing ng failure, bent shaf shafting ting,, roto rotorr inte interfere rference. nce. Correct as neces neces-sary. c. Roto Rotorr out of balan balance. ce. Repair as necessary necessary.. d. Air leaking leaking into suction. suction. Check pump mechanical mechanical seal or packi packing ng and suct suction ion piping. piping. e. Air or gas entrained entrained in fluid fluid.. Vent Vent pump discharge discharge or suct suction ion as neces necessary sary.. f. Flui Fluid d vaporizing vaporizing in the suction. suction. Reduce suction suction lift. g. Relie Relieff valv valvee chat chatterin tering. g. Reset crack cracking ing or resea reseating ting pressure. pressure. 503-3.8.6 5033.8.6 Pump Wears Wears Rapidly Rapidly..

If any pump wears wears rapidly rapidly, this could be due to:































S9086-RH-STM-010

503-3.8.7 Shor 503-3.8.7 Shortt Life of Mechanical Mechanical Seals and Packing. Packing. Most pumps pumps being designed designed and produce produced d today use mechanical seals as the preferred means of sealing the pump shafts against air leakage into the casing. Packing is still used on existing units in the fleet, but considered to be the secondary means of sealing the shaft opening in the casing. Pumps with packing are being replaced mechanical seal units at overhaul during the life cycle schedules. Packing is also used in an emergency in the event of mechanical seal failure. Short life of mechanical seals or packing may be due to: a. Misa Misalign lignment ment.. Check alignment alignment and corre correct ct as neces necessary sary.. b. Mechanica Mechanicall seal or packi packing ng impr improper operly ly inst installe alled. d. Repl Replace ace mech mechanica anicall seal or pack packing ing in accor accordanc dancee with the technical repair standard, Preventive Maintenance System (PMS) Maintenance Requirement Card (MRC) or the technical manual. c. Wr Wrong ong packing (packed (packed unit unitss only only). ). Repl Replace ace packing with approved packing. packing. d. Packi Packing ng too tigh tightt preve preventin nting g lubri lubricatio cation n of the pack packing ing and shaft shaft.. Repac Repack k packi packing ng gland and adju adjust st leakoff. leakoff. e. Worn bearings. bearings. Repair or replace as required. required. f. Worn or scored shaft sleeve at packing area. Replace Replace shaft sleeve and repack pump. g. Bent shaft. shaft. Repair or replace as required. required. h. Inter Interferen ference ce betw between een stationary stationary and rotat rotating ing parts. Repair or repla replace ce as requ required. ired. i. Rotor out out of balance. balance. Balance Balance rotor as required required.. k. Contaminated sealing water to packing gland gland or seal. Identify source of contamination and correct as required. l. Pump speed speed too high. high. Reduce pump speed speed if possible. possible.































S9086-RH-STM-010

e. Mech Mechanica anicall failu failure re inside pump caus causes es exces excessive sive thrust. thrust. Repai Repairr as neces necessary sary.. f. Bent shaft. shaft. Correct as necessary necessary.. g. Roto Rotorr out of balance. Correct Correct as neces necessary sary.. h. Inter Interferen ference ce betw between een stationary stationary and rotating parts. Correct as neces necessary sary.. 503-3.8.10 503-3.8.1 0 Sucti Suction on Line Vapor Vapor Lock. Lock. When a pump is in good conditio condition n and builds a good vacuum vacuum on suction suction but does not build discharge pressure after all other possible problems are corrected, vapor lock in suction piping should be investigated. Investigation should be initiated particularly in long lengths of fuel suction piping and especially after new oil cargo has been received or the oil has been heated. Shift suction to another tank or group of tanks nearer the pump; usually the pump will build pressure immediately. 503-3.8.10.1 503-3.8.1 0.1 The lighter hydrocarbon hydrocarbonss such as gaso gasoline line have much higher vapor pressure than heav heavier ier fuels at the same temperature. If heavy pounding of the pump occurs when pumping fuel, the vacuum on the suction side of the pump usually is excessively high or the temperature of the fuel is high for the type of fuel being pumped. These factors cause partial vaporization in the suction line or pump casing. 503-3.8.10.2 503-3.8.1 0.2 In meas measurin uring g suct suction ion lift, first measure absolute absolute sucti suction on press pressure ure avai available lable.. Ensu Ensure re that the resul resultting absolute suction pressure is greater than atmospheric pressure minus the vapor pressure at the pumping temperature plus 2 lb/in 2 (approximately 4.1 in. hg). For example: a pump which is pumping gasoline with a vapor pressure of 11 lb/in 2 absolute should have an absolute suction pressure available greater than 14.7 -(11 + 2) = 1.7 lb/in 2 or a suction lift less than 3.5 in. hg (conversion from lb/in 2 to in. hg): 1.7 lb./i lb./in n

2

x 2.03 in. Hg/lb/in

2

= 3.46 in. Hg































S9086-RH-STM-010

The allowable clearance for low pressure, low suction lift pumps (for example, lubricating oil, fuel booster, and tank drain pumps) is larger than the allowable clearance for medium and high pressure pumps (for example, boiler fuel service pumps). As the pressure drop across the clearance space increases, closer tolerances must be maintained to prevent degraded pump performance. Similarly, as suction lift increases, the allowable clearances must be tighter so that the pump will be able to pull a vacuum and lift the fluid into the pump. Increased pressures and internal clearances result in a greater loss of pump capacity due to increased pump internal fluid recirculation or slip. Materials for wearing plates and liners shall be compatible with the system usage and may include stellite or ceramic materials with NAVSEA approval. 503-3.9.4 Thru 503-3.9.4 Thrust st Bearings. Bearings. Thru Thrust st bearings bearings should be inspected, inspected, and clearances clearances checked in accordance accordance with applicable PMS and technical manual. Bearings shall be replaced, not rebabbitted. 503-3.9.5 Ti 503-3.9.5 Timing ming Gears. Gears. Some pump pump types may have have timing timing (or synchronizi synchronizing) ng) gears which which are fitted to rotor rotor shaftss to main shaft maintain tain correct clear clearances ances between the two pum pumping ping rotors duri during ng opera operation tion.. To main maintain tain correct clearances, gears must be locked to the rotor shaft in correct position to maintain the clearance between rotor elements as shafts make a complete revolution; therefore, no lost motion is permissible adjacent to keys or pins holding rotors and gears in position on the shafts. 503-3.9.6 Moto 503-3.9.6 Motors rs and Controllers. Controllers. Inst Instructi ructions ons in NSTM Chapter 302, 302, Electric Motors Motors and Controllers Controllers,, should be followed for motor-driven unit maintenance. 503-3.9.7 503-3. 9.7 Turb urbine ines. s. Ins Instru tructi ctions ons in NST NSTM M Cha Chapte pterr 50 502, 2, Aux Auxili iliary ary Ste Steam am Tu Turbi rbines nes,, sho should uld be fol follow lowed ed for turbine-driven unit maintenance.































S9086-RH-STM-010

i. Cond Conductin ucting g operational operational performance performance testing testing j. Checking internal clearances (bearings, plates, liners, rotors, timing gears, casing throat bushings, dif diffusers, fusers, and gears, etc.). 503-3.10

OVERHAUL OVER HAUL OR REP REPAIR. AIR.

Rotary pumps are to be overhauled and/or repaired in accordance with the requirements of General Specifications for Overhaul of Surface Ships (GSO), the applicable Technical Repair Standard (TRS), and the equipment technical manual. 503-3.10.1 503-3.10. 1 Asse Assembly mbly Drawing Drawings. s. When repairin repairing g or maki making ng an interior interior pump examinatio examination, n, it is esse essential ntial that that all PMS performance test data, drawings and available dimensional data be at hand. Frequently, alterations occur in such important dimensions as clearance between rotors and casing wearing plates and liners, and shaft seal or gland adjustments, resulting in poor operation. This problem will persist in spite of other major repairs until the real cause is corrected. For these reasons, unauthorized field conversion or parts substitution should be avoided. 503-3.10.2 503-3.10. 2 Renew Renewing ing Wearin Wearing g Plates and Liners. Liners. When Whenever ever the pump casing casing is opened, opened, the clearance clearance between between casing liners and plates and various parts of the rotors and shaft should be measured to determine if excessive wear has taken place and if renewal is necessary. If bearings are worn excessively, it is reasonable to expect that liner replacement is necessary. Liners should not be renewed unless worn pump bearings are restored to their original readings. The required bearing oil clearance is usually given on the manufacturers’ plans. In the absence of this data, the table of tolerances and clearances provided in Table 503-2-3 should 503-2-3 should be followed. 503-3.10. 5033.10.3 3 Repai Repairs rs using polymeric polymeric comp compound oundss are prohibited prohibited for most if not all PD pump appli applicatio cations. ns.































3-20

































S9086-RH-STM-010

SECTION 4 RECIPROCATING PUMPS

503-4.1

RECIPROCA RECI PROCATING TING PUMP PUMP SAFETY SAFETY PRECA PRECAUTION UTIONS. S.

Adherence to the following prescribed precautionary practices will help ensure safe operation of reciprocating pumps.

a. Never use a jacking bar to start a pump while the steam valve valve to the pump is open. b. Excep Exceptt in an emergency emergency,, boil boiler er feed pum pumps ps shall not be used for purp purposes oses other than those connected connected with the































S9086-RH-STM-010































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503-4.4.2 Troubles 503-4.4.2 Troubleshoot hooting. ing. Tr Troubl oublesho eshootin oting g recip reciprocat rocating ing pumps will require a work working ing knowledge knowledge of the pump and the system it serves. Detailed instructions are available in the applicable equipment technical manual and Ships Information Books (SIBs). Also available at the deckplate level are the Engineering Operating Casualty Control (EOCC) procedures and Engineering Operating Sequencing System (EOSS). 503-4.5 5034.5

MAINTE MAI NTENAN NANCE. CE.

503-4.5.1 Main 503-4.5.1 Maintenan tenance ce of recip reciprocat rocating ing pumps will require a work working ing knowledge knowledge of the pump and its system. system. For detailed instructions, consult the appropriate technical manuals. 503-4.6 5034.6

REPAIR REP AIRS. S.

503-4.6.1 Draw 503-4.6.1 Drawings ings and Data. Data. When a pump pump is to be repaired repaired or examined, examined, assembl assembly y and detail detail drawings drawings along along with available dimensional data must be at hand. After overhaul, important dimensions frequently become altered































S9086-RH-STM-010

SECTION 5 MECHANICAL SEALS AND PACKED STUFFING BOXES 503-5.1

GENERAL GENER AL DESC DESCRIPTI RIPTION. ON.

503-5.1.1 In order to prevent excessive 503-5.1.1 excessive leakage at the point where the shaft pene penetrate tratess the pump, casing seals are required. This leakage may take the form of the loss of some of the fluid being moved by the pump by its exiting the casing, or in the case of a pump operating in a suction lift condition where the casing pressure is less than atmospheric, of air entering the casing. There are generally two types of seals which are used to prevent this leakage: packing or mechanical seals. Older design pumps may use either packing or mechanical seals depending on the specific pump design; however, more recently designed pumps, with the exception of reciprocating pumps, require the use of mechanical seals as the primary sealing method with the use of packing as an emergency back-up.

































S9086-RH-STM-010

m. Pusher Pusher Seal That portion portion of of a mechanical mechanical seal’s seal’s seconda secondary ry seal which which is dynami dynamicc in nature nature and moves moves axially on the shaft to account for any axial movement of the primary seal due to sealing face irregularities. These seals are generally O-rings, Anti-X-rings, chevrons rings, etc. n. Semi - Split Split Mechani Mechanical cal Seal are split in half.

A mechan mechanical ical seal seal where where only only the mating mating ring, ring, primary primary ring ring and elastom elastomers ers































S9086-RH-STM-010

ships and by NSWCCD-SSES 9232 for all other pumps.































S9086-RH-STM-010































S9086-RH-STM-010

503-5.3. 503-5 .3.2 2 Sea Seall Op Opera eratio tion. n. Suc Succes cessfu sfull op opera erati tion on of a mec mechan hanica icall se seal al dep depend endss on pr prope operr in insta stalla llati tion, on, an adequate supply of clean flushing liquid, and proper venting of the stuffing box. Mechanical seals should never be operated dry, without sealing liquid in the pump stuffing box. The seal depends on the cooling provided by the liquid in the stuffing box and the lubricating provided by the thin film of liquid between the seal faces for proper operation opera tion.. Unli Unlike ke packi packing, ng, mech mechanica anicall seals do not require perio periodic dic adju adjustme stment nt duri during ng opera operation tion and shou should ld operate with negligible leakage without attention.































S9086-RH-STM-010

503-5.3.8 Leak 503-5.3.8 Leakage age and Replacement Replacement Criteria. Criteria. Leak Leakage age and replacement replacement criteria criteria for newly installed installed mechani mechanical cal seals and in-service mechanical seals are as follows: 503-5.3.8.1 503-5.3.8 .1 Non-F Non-Flamm lammable able Liquids. Liquids. When non-flamma non-flammable ble liquids liquids are bein being g pumped, mechanical mechanical seals shall be replaced in accordance with the following guidelines:









































































































































































































































































































































































































S9086-RH-STM-010 Ch 503 Pumps Rev 4

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