These are workouts Based on the principle of Magneto Geometrical Application.
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18
Calculating Lubrication Rates for ARIEL ARIEL Compressor Cylinders & Rod Packing
Visit Us On the Internet: www. www. cct.nu INTRODUCTION
The opt optimu imum m qua quanti ntity ty of oil to lubr lubrica icate te com compre presso ssorr cyl cylind inders ers is cal calcul culate ated d usi using ng sev severa erall dif differ ferent ent for formul mulas as by com compre presso ssor r manufacturers with an end result of various lube rates. Even identical compressors will require different lube rates depe de pend ndin ing g on ap appli plica cati tion on.. Th The e pu purp rpos ose e of th this is ou outl tlin ine e is to pr prov ovid ide e th the e en end d us user er ad adeq equat uate e me mean ans s of fi find nding ing a sa safe fe st star arti ting ng place pla ce for lub lubric ricati ating ng com compre presso ssorr cyl cylind inders ers and rod pac packin king. g. A st stand andard ard pra practi ctice ce for new or fre freshl shly y rev revamp amped ed com compre presso ssors rs is to do doub uble le th the e lu lube be ra rate tes s fo forr an in init itia iall br brea eakk-in in pe peri riod od of 20 200 0 ho hour urs. s. Lu Lubr bric icat atio ion n ra rate tes s ca can n al also so be af affe fect cted ed by th the e co cond ndit itio ion n of your compressor. Excessive lube rates may be necessary due to abnormal wear or overdue maintenance. Under averag ave rage e con condit dition ions s the fol follow lowing ing for formul mula a wil willl pro provid vide e an oil fil film m thi thickn ckness ess of .00 .002. 2. Note:Always consu consult lt the comp compresso ressor r manufact manu facturer urer or lubr lubricat ication ion syst system em desi design gn engi engineer neer for speci specific fic lubri lubricati cation on rate rates s and depen dependable dablesyste system m desig design. n. ARI RIEL EL CO CORP RPOR ORA ATI TION ON BASE LU LUBR BRIC ICA ATI TION ON RA RATE TES S
Rod Packing Pints Per Day .674 .674 .900 1.20 1.60 2.00 2.88 2.50 3.12 6.00 7.50
CALCULATING DIVIDER BLOCK FLOW RATES in PINTS PER DAY To cal calcul culate ate the lub lubric ricati ation on req requir uireme ement nts s for a giv given en cyl cylind inder er and its packing/s multiply the diameter of the cylinder bore times the “Cylinder Base Lubrication Rate” from the table above, add the “Rod Packing Pints Per Day” from the table above (”TR” cylinders have TWO packings). Multiply this total by the multiple to the “Base Rate” obtained from the c ha ha rt rt on pa ge ge 1 9 “C yl yl in ind er er / Pac ki ki ng ng L ub ube O ilil Recommendations for Various Gas Stream Components”, (Use (Us e eac each h cyl cylinde inders rs act actual ual dis discha charge rge pre pressu ssure re and gas quali qua lity ty.) .) Note: Do No Nott us use e a mu mult ltip iplie lierr on pa page ge 19 fo forr "T "TR" R" pack pa ckin ings gs.. Th The e lu lube be ra rate tes s fo "T "TR" R" pa pack cking ing ha have ve be been en corr co rrec ecte ted d fo forr ma maxi ximu mum m di disc scha harg rge e pr pres essu sure res s of th thes ese e cylinders. For Example: Example: For a 10-1/2K cylinder cylinder with “Pipeline “Pipeline Quality Quality Natura Nat urall Gas Gas”” at 1100 PSI PSIG G dis discha charge rge pre pressu ssure, re, cal calcul culate ate 10.5 x .5 + 2.00 x 1.25 = 9.0625 U.S. Pints of oil used for lubrication lubric ation in 24 hours of operation at rated speed (see the name plate on the top cover for the rated speed) by this cylinder cylind er and its packing/s packing/s.. For each divider divider block add the lubrication requirements for all cylinder/s and packing/s fed by tha thatt par partic ticula ularr div divide iderr blo block. ck. Example: 10-1 10 -1/2 /2K K @ 110 100P 0PSI SIG G = 10 10.5x .5x .5+ 2. 2.00x 00x 1. 1.25= 25= 9. 9.06ppd 06ppd 4-1/ 41/4K 4K-T -TR R = 4. 4.25x 25x 1. 1.0 0 + (6 (6.0 .00 0 x 2)= 16 16.2 .25 5 pp ppd d 9.06 9. 06 + 16 16.2 .25 5 = 25 25.3 .31 1 pp ppd, d, to tota tall fl flow ow fo forr th this is di divi vide derr bl bloc ock k For Lubrication System Design & and Lubrication Rates for All Other Compressor and Engine Engine Manufacturers Contact C C Technology @ 1-800-664-4033.
CALCULATING DIVIDER BLOCK FLOW RATES in PINTS PER DAY (Cont’d) Q = Fl FlowRat owRate e inPin inPintts Pe Perr da day y M = Tot otal al val value ue of the Div Divide iderr Blo BlockAssem ckAssembly bly 6 = Co Cons nsta tant nt to co conv nver ertt Cu Cu.I .In. n./S /Sec econ onds ds to Pi Pint nts s Pe Perr Da Day y T = Ti Time me in se seco cond nds s fo forr on one e co comp mplet lete e cy cycl cle e of th the e di divi vide der r block. Note: Cycle indicator indicator pin must travel from full out position and return to full out position to indicate one full cycle. Each Each blink of the LED on the DNFT indicates indicates one fulll cyc ful cycle le of the div divide iderr blo block. ck. To find the quantity of oil currently flowing through the divider block in pints per day: (24 hours operation at currentt RPM) curren Exampl Exa mple: e: Cyc Cycle le tim time e of the div divide iderr blo block ck is 22 sec second onds. s. 1. Add the to tota tall of th the e nu numb mber ers s on th the e fr fron ontt of th the e individual individ ual divide dividerr block blocks. s. Examp Example:(24 le:(24+12+24 +12+24 =60) 2. Mu Mult ltip iply ly th the e to tota tall va valu lue e of th the e di divi vide derr bl bloc ocks ks x 6. Example:(6x60=360) 3. Di Divi vide de th the e an answ swer er (3 (360 60)) by th the e cy cycl cle e ti time me in se seco cond nds. s. (360 (36 0 22= 22=16. 16.36 36 Pin Pints ts Per DayT DayTota otall to Com Compre presso ssor) r)
24 12 24
Q=6M
24 T 12 24 60= 60 =M-Tot otal al Val alue ue of Di Divi vide derr Bl Bloc ock k
M=60x 6= 6=36 360 0 Q=16. =16.36 36 Pin Pints ts Per DayTo DayTotal tal Pum Pump p Rat Rate e T= 22 To fi find nd th the e cy cycl cle e ti time me if th the e fl flow ow ra rate te is kn know own n Example: Recommended oil consumption for maximum effic ef ficien iency cy is 16. 16.36 36 PPD PPD..
24 12 24
Mx6
T= 24 Q 12 24 60= 60 = M-Tot otal al Valu alue e of Di Divi vide derr Bl Bloc ock k
M=6 =60 0 x 6= 6=36 360 0 T= 22 Cy Cycl cle e Tim ime e In Se Seco cond nds s Q= 16. 16.36 36
19
Cylinder / Packing Lube Oil Recommendations for Various Gas Stream Components Visit Us On the Internet: www. cct.nu < 1000 PSIG ( <70 BAR G )
GAS STREAM
1000 to 2000 PSIG ( 70 to 140 BARG )
A*
A*
2000 to 3500 PSIG 3500 to 5000 PSIG ( 140 to 240 BARG ) ( 240 to 345 BARG )
A*
> 5000 PSIG ( > 345 BARG )
SAE 40Weight ISO150
SAE 40-50 Weight ISO150-220 1.25 x BaseRate
SAE 50Weight W/Compounding ISO220-320 1.50 x BaseRate
Cylinder Oil ISO320-460 2.0x Base Rate Or Synthetic Diester / Polyglycol
See Pipeline Quality Natural Gasor Synthetic Diester / Polyglycol
See Pipeline Quality Natural Gasor Synthetic Diester / Polyglycol
See Pipeline Quality Natural Gas or Synthetic Diester / Polyglycol
Air
SAE 40Weight Compressor Oil ISO150
SAE50 Weight Air Compressor Oil W/Compounding ISO220 1.50 x BaseRate
Synthetic Diester 1.50 x BaseRate
Contact Lubricant Supplier
ContactLubricant Supplier
WetAir
SAE 40-50 Weight Air Compressor Oil W/Compounding ISO150-220
Synthetic Diester 1.50 x BaseRate
Synthetic Diester 2.0 x Base Rate
Contact Lubricant Supplier
ContactLubricant Supplier
CarbonDioxide 2%to 10%
SAE 40-50 Weight ISO150-220 1.25 x BaseRate
SAE50-60 Weight Or SAE 40Weight W/Compounding ISO220-320 1.50 x BaseRate
Cylinder Oil W/Compounding ISO460-680 2.0 x Base Rate OrSynthetic PAG
Cylinder Oil W/Compounding ISO680 3.0 x Base Rate OrSynthetic PAG
ContactLubricant Supplier
CarbonDioxide > 10%
SAE 40-50 Weight ISO150-220 1.50 x BaseRate
SAE50-60 Weight Or SAE 40Weight W/Compounding ISO220-320 2.0 x Base Rate
Cylinder Oil W/Compounding ISO460-680 3.0 x Base Rate OrSynthetic PAG
Cylinder Oil W/Compounding ISO680 4.0 x Base Rate OrSynthetic PAG
ContactLubricant Supplier
Nitrogen
SAE 40Weight ISO150
SAE 40-50 Weight ISO150-220
SAE50 Weight ISO220
SAE60 Weight ISO320
Cylinder Oil ISO460-680
H2S HydrogenSulfide 2%to 30%
SAE40 Weight W/Compounding ISO150 1.50 x BaseRate
SAE40-50 Weight W/Compounding ISO150-220 1.75 x BaseRate
SAE 50Weight W/Compounding ISO220 2.0x BaseRate
SAE 60Weight W/Compounding ISO320 3.0x BaseRate
SAE 60Weight W/Compounding ISO460-680 4.0 x Base Rate
H2S HydrogenSulfide > 30%
SAE40 Weight W/Compounding ISO150 1.75 x BaseRate
SAE40-50 Weight W/Compounding ISO150-220 2.0 x Base Rate
SAE 50Weight W/Compounding ISO220 2.5x BaseRate
SAE60Weight W/Compounding ISO320 4.0 x Base Rate
Cylinder oil W/Compounding ISO460-680 6.0 x Base Rate
SAE 40Weight or Refrigerant Oil 0.5 x BaseRate
SAE 40Weight or Refrigerant Oil 1.0 x BaseRate
Refrigerant Oil Contact Lubricant Supplier
Refrigerant Oil Contact LubricantSupplier
Refrigerant Oil Contact LubricantSupplier
Pipeline Quality Natural Gas
Propane (Refrigerant) Notice: Verify oil pour point temperature is below inlet gas temperature.
Cylinder Oil W/ compounding ISO460-680 3.0x Base Rate OrSynthetic Polyglycol
CAUTION:
Always consult the compressor manufacturer for lube oil requirements. The formulas on the previous page and the lube oil recommendations are calculated quantities and influenced by several unknown factors which must be included in the calculations when designing the lubrication system. An easy method for detecting correct lubricant quantities is a visual inspection of internal surfaces of the compressor cylinder. The obvious sign of excessive lubrication is oil collecting in cylinder low spots or valve ports. Wipe the cylinder with a tissue paper. If oilappears evenly on thetissue paper you are close to optimum efficiency. If the tissue paper is dry or unevenly spotted the feed rate is too low. A few recommended steps for efficient compressor lubrication are: Always consult the compressor manufacturer or lubrication system designer to insure existing divider blocks are designed correctly for the compressor cylinders and packing. Pressure test divider blocks and lubricator pump for output volume annually to verify integrity. Usedivider blocks with smaller pistons. This will regenerate oilfilm thickness more often. Use good quality oil formulated for the service of the compressor. When adjusting for optimum lubrication, reduce or increase oilrates by 10% andoperate under existing conditions for 10 to 14 days before next inspection. A*: It is recommended to use water cooledpacking forcompressor cylinders operatingwith these pressures. B*: Lean burn engine oils contain detergents, dispersants and ash additives which hold water in suspension. In certain applications this suspendedcondensate cancause problems with possible inadequate lubrication of thecylinders and packing.
