Operation and Maintenance Manual
FLS Gate Valve with Double Acting Hydraulic Actuator
TC1036
All the information contained in this manual is the exclusive property of Cameron. Any reproduction or use of the calculations, drawings, photographs, procedures or instructions, either expressed or implied, is forbidden without the written permission of Cameron or its authorized agent.
Initial Release A1 December 1992 Revision A2 September 1998
Copyright © 1998 all rights reserved by Cooper Cameron Corporation Cameron Division TC1036
2
PREFACE The procedures included in this book are to be performed in conjunction with the requirements and recommendations outlined in API Specifications. Any repairs to the equipment covered by this book should be done by an authorized Cameron service representative. Cameron will not be responsible for loss or expense resulting from any failure of equipment or any damage to any property or injury or death to any person resulting in whole or in part from repairs performed by other than authorized Cameron personnel. Such unauthorized repairs shall also serve to terminate any contractual or other warranty, if any, on the equipment and may also result in the equipment no longer meeting applicable requirements. File copies of this manual are maintained. Revisions and/or additions will be made as deemed necessary by Cameron. The drawings in this book are not drawn to scale, but the dimensions are accurate. This book covers a Cameron gate valve with actuator.
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CONTENTS
Page I. ILLUSTRATIONS AND PARTS LISTS
6
II. INSPECTION
10
III. INSTALLATION
10
IV. OPERATION AND MAINTENANCE
10
A. Operation
10
B. Maintenance
12
V. TROUBLESHOOTING
14
VI. SERVICE AND REPAIR
15
TC1036
A. Assembly Procedure
15
B. Stem Packing Replacement
21
C. Ordering Replacement Parts
23
5
1 2
4 3 5 11 13
12
6
10
14
8
15
28
41
7
17
9
16
8 9
17
28
16
8
27
20
23
19
22
18
21
25 24
39
26 29 31 40
34 30
32 (Sub-Assembly) 33 35
26
11
22
37
23 38 36
2-1/16" 10,000 psi WP FLS Tailrod Hydraulic Gate Valve With Bolt On Stuffing Box Ref SK-11573-01 TC1036
SD-017248
6
Parts List: 2-1/16" 10,000 psi WP FLS Tailrod Hydraulic Gate Valve W/Bolt-on Stuffing Box Item
Qty
Description
1 *2 *3 4 5 6 7 *8 *9 10 11 12 13 14 15 16 *17 *18 *19 *20 21 *22 *23 24 25 26 27 *28 29 30 *31 *32 33 34 35 36 *37 38 39 40 41 42 43 44
1 1 1 1 1 1 1 3 4 2 1 6 6 1 1 1 2 3 1 1 1 2 2 1 8 8 2 1 1 1 2 1 8 8 1 1 1 1 1 1 2 1 1 1 4.60 lb
Locking Screw O-Ring (Adjusting Nut) Back-Up Ring (Adjusting Nut) Adjusting Nut Fitting, Grease (Adjusting Nut) Pin, Centering Screw, Socket Head Set (Center Pin to Stem) O-Ring, (Piston & Heads) Back-Up Ring, (Piston & Heads) Screw, Socket Head Set (Cylinder Head to Adjusting Nut) Cylinder Head Stud, (Cylinder Head Tie Down) Nut, Heavy Hex (Cylinder Head Tie Down) Cylinder Nut, Elastic Stop (Piston Lock) Piston O-Ring, (Stem to Piston & Gland) Back-Up Ring, (Stem to Piston & Gland) O-Ring, (Gland to Head) Back-Up Ring (Gland to Head) Packing Gland Packing (Bonnet & Stuffing Box) Ring, Back-Up (Bonnet & Stuffing Box) Bonnet with Lower Cylinder Head Stud, (Bonnet) Nut, Heavy Hex (Bonnet) Fitting, Grease (Bonnet & Stuffing Box) Ring Gasket (Bonnet) Stem Stem, Balancing Sub-Assembly, Seat & Seals Gate Retainer Plate Stud (Stuffing Box) Nut, Heavy Hex (Stuffing Box) Stuffing Box, Bolt-On Ring Gasket (Stuffing Box) Body Protector & Indicator Stem Pin, Dowel Adapter Pipe (Cylinder OD) Fitting, Grease (Bonnet) Nameplate (Body) Nameplate (Cylinder OD) Grease, Standard Valve Lubricant
45
1
Accessory Item Handwheel *Recommended Spare Part
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7
45 (Assembly)
1
3
2
12
5
13 11
4
9
6
41 10
7
8
15
9
16
8
18
9
41
17
17
14
18
8
19
9
20
25
42
26
21 23
27
22
24 28 29
43 31 (Sub-Assy)
38
40
32
33 o
(Shown 90 Out Of Position) 27 37 22 35
23
34 36 39
30
3-1/16" 10,000 psi WP Tailrod Hydraulic Gate Valve With Bolt-On Stuffing Box Ref SK-11573-02 TC1036
SD-017249
8
Parts List: 2-1/16" 10,000 psi WP FLS Tailrod Hydraulic Gate Valve W/Bolt-on Stuffing Box Item
Qty
Description
1 *2 *3 4 5 6 7 *8 *9 10 11 12 13 14 15 16 *17 *18 *19 *20 21 *22 *23 24 25 26 27 *28 29 30 *31 *32 33 34 35 36 *37 38 39 40 41 42 43 44
1 1 1 1 1 1 1 3 4 2 1 6 6 1 1 1 2 3 1 1 1 2 2 1 8 8 2 1 1 1 2 1 8 8 1 1 1 1 1 1 2 1 1 1 4.60 lb
Locking Screw O-Ring (Adjusting Nut) Back-Up Ring (Adjusting Nut) Adjusting Nut Fitting, Grease (Adjusting Nut) Pin, Centering Screw, Socket Head Set (Center Pin to Stem) O-Ring, (Piston & Heads) Back-Up Ring, (Piston & Heads) Screw, Socket Head Set (Cylinder Head to Adjusting Nut) Cylinder Head Stud, (Cylinder Head Tie Down) Nut, Heavy Hex (Cylinder Head Tie Down) Cylinder Nut, Elastic Stop (Piston Lock) Piston O-Ring, (Stem to Piston & Gland) Back-Up Ring, (Stem to Piston & Gland) O-Ring, (Gland to Head) Back-Up Ring (Gland to Head) Packing Gland Packing (Bonnet & Stuffing Box) Ring, Back-Up (Bonnet & Stuffing Box) Bonnet with Lower Cylinder Head Stud, (Bonnet) Nut, Heavy Hex (Bonnet) Fitting, Grease (Bonnet & Stuffing Box) Ring Gasket (Bonnet) Stem Stem, Balancing Sub-Assembly, Seat & Seals Gate Retainer Plate Stud (Stuffing Box) Nut, Heavy Hex (Stuffing Box) Stuffing Box, Bolt-On Ring Gasket (Stuffing Box) Body Protector & Indicator Stem Pin, Dowel Adapter Pipe (Cylinder OD) Fitting, Grease (Bonnet) Nameplate (Body) Nameplate (Cylinder OD) Grease, Standard Valve Lubricant
45
1
Accessory Item Handwheel *Recommended Spare Part
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II. INSPECTION A. Inspect the ring grooves for pitting and other visible damage. If defects are found, contact Cameron personnel for repair work. B. Actuator Inspection 1. Attach a temporary supply line to the close NPT port in the lower end of the cylinder. 2. Apply 50 to 150 psi gas or hydraulic supply pressure to the cylinder. 3. Inspect the valve bore to ensure that the gate bore is properly aligned. If it is not fully open, contact a Cameron service representative. 4. Release the supply pressure. 5. If the valve does not stroke smoothly or if a leak is detected, see Part V or contact a Cameron representative. III. INSTALLATION The Cameron FLS with double acting hydraulic actuator operates properly when installed in any orientation. The valve is a bi-directional sealing design. IV. OPERATION AND MAINTENANCE A. Operation The double acting hydraulic actuator on a FLS gate valve requires operating pressure within the range of 1500 to 3000 psi. Pressurizing the upper port (farthest from the valve)closes the valve. Pressurizing the lower port (closest to the valve) opens the valve. The valve will remain in position after release of actuator pressure due to the balanced stem design (lower stem balances pressure thrust on upper stem), and the actuator does not contain springs. Stem packings at the upper and lower stems seal line pressure. However, should some leakage occur past the upper stem packing, a vent port and seals above the vent will prevent line pressure from entering the actuator. The required operating pressure for the double acting actuator is usually much lower than published minimum of 1500 psi. That value takes into account fouling of the valve by drilling fluids, etc., and is not expected to represent the “normal” situation. The actuator has a maximum rated working pressure of 3000 psi. Hydraulic oils or water that contains a water soluble lubricant (Cameron lubricant 590X) can be used as the operating fluid. 590X protects the hydraulic system and has good flow characteristics. Add an appropriate amount of ethylene glycol (antifreeze) for freeze protection of water based fluid. The valve lower stem indicates valve position, viewed through slots in the lower stem protector/indicator. When the valve is open, the lower stem is up (towards the valve body). When the valve is closed, the lower stem is down (away from the valve body). TC1036
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1. The manual locking screw may be used to close the valve when hydraulic operating pressure is not available and there is little or no pressure in the valve. 2. The manual locking screw may also be used to lock the valve in the closed position. a. Apply hydraulic pressure to the actuator (closing port cylinder port farthest from the valve) to close the valve. b. Release hydraulic pressure from the actuator. c. Turn the locking screw handwheel clockwise (to the right) until it firmly contacts the centering pin on the piston. 3. To ‘unlock’ and open a closed valve: a. Turn the locking screw counterclockwise (to the left) until the locking screw shoulder contacts the adjusting nut. b. Apply hydraulic pressure to the actuator (opening port, cylinder port closest to the valve) to open the valve. c. Release hydraulic pressure from the actuator.
Note: Actuator internal stops absorb piston force at both ends of the stroke to limit gate travel. In the fully closed position, the piston contacts the stem packing gland in the bonnet. The piston contacts the adjusting adapter in the upper cylinder head when the valve is fully open.
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B. Maintenance 1. Maintenance Schedule The following maintenance checklist covers normal or routine service. More frequent maintenance may be necessary for unusual or more adverse conditions. NORMAL CHRISTMAS TREE SERVICE COMPONENT Body
MAINTENANCE OPERATION
SERVICE INTERVAL
Lubricate
10 Cycles**
UNUSUAL TEMPORARY SERVICE - CEMENT THROUGH ACIDIZE THROUGH - OTHER UNUSUAL SERVICE COMPONENT
MAINTENANCE OPERATION
SERVICE INTERVAL
Body
Lubricate*
Prior to Service
Body
Flush with Appropriate Neutralizing Fluid
After Service
Body
Lubricate*
After Flush
CHOKE MANIFOLD SERVICE COMPONENT
MAINTENANCE OPERATION
SERVICE INTERVAL
Valve Assembly
Pressure Test
1 Week
Valve Assembly
Flush with Appropriate Neutralizing Fluid, Operate, and Lubricate*
1 Month***
*The valve is lubricated through a grease fitting located on the actuator bonnet. Recommended lubricants and amounts are shown below. **One cycle equals opening and closing the valve one time. The service interval can vary according to application, fluids used, and well conditions. ***Periodic maintenance must also be performed after every “kick” or other conditions when drilling fluids have been processed through the valve.
2. Recommended lubricants For optimum performance, only Cameron valve lubricants should be used.
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MASTER LUBRICATION CHART Lubricant Name
P
P
F
F
P
Mineral 700149 700667 700668 700669 700670 Spirits
Arctic
NS-14
E
E
P
P
F
F
P
Mineral 700123 700671 700672 700673 700674 Spirits
Diesel Resistant
SS-14 or TS-41
E
P
E
P
G
G G
Alcohol 700150 700675 700676 700677 700678
High Temperature
HT-14
G
F
P
E
F
F
P
Mineral 700217 700679 700680 700681 700682 Spirits
High Temperature
Moly 101
G
P
P
E
G
F
P
Mineral 710194 Spirits
E - Excellent G- Good
400 lb Drum
P
120 lb Drum
Very High CO2
E
25 lb Pail
With Gas Well Condensates
CI-14 or TF-41
5 lb Can
With H2S (Sour Crude or Gas)
Standard
(Per Pound)
High Temp. RT to +650° F
Quantities (By Part Number) Available on a Standard Order Basis
Diesel
Solvent
Low Temp. to -75° F
Operational Properties
Standard Crude
Service
F - Fair P - Poor Example for Ordering: Order Part Number 700672 for 25 lb of NS-14
SD-4185
3. Amount of lubricant required: Bore Size (in.)
Pressure Rating
Lubricant Volume Required (cu in.)
Lubricant Weight (lb)
113/16 21/16 29/16 29/16 31/8 31/16 31/16 41/8 41/16 51/8 51/8 61/8 63/8
All All To 10,000 15,000 To 5000 10,000 15,000 To 5000 10,000 5000 10,000 To 5000 To 5000
38 43 79 93 114 114 155 245 243 312 461 583 583
1.5 1.7 3.2 3.7 4.6 4.6 6.2 9.8 9.7 12.5 18.5 23.3 23.3
Approximate Follower Plate Travel (in.)
.5 .7 1.3 1.6 1.9 1.9 2.6 4.2 4.1 5.3 7.8 9.9 9.9 SD-4130
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V. TROUBLESHOOTING A. Valve Troubleshooting Chart: Malfunction Well pressure leaks past valve.
Cause Valve gate and seat assembly leaks or is installed improperly.
Line fluid leaks between Bonnet gasket leaks. valve body and bonnet. Valve does not close.
Corrective Action Disassemble the valve and replace or reinstall the gate and/or seat. Tighten the bonnet nuts. If leak persists, replace the bonnet gasket.
Inadequate operating Apply 1500 to 3000 psi pressure to the actuator close port. Excessive friction on Lubricate the valve. gate. Hydrates or ice in valve body.
Valve does not open.
Warm the valve body to melt hydrates or ice.
Inadequate operating Apply 1500 to 3000 psi pressure. to the actuator open port. Valve held closed by T u r n l o c k i n g s c r e w h a n d wh e e l c o u nt e rmanual locking screw. clockwise full stroke. Excessive friction on Lubricate the valve. gate. Hydrates or ice in valve Warm the valve body to body. melt hydrates or ice.
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B. Actuator Troubleshooting Chart: Malfunction
Cause
Corrective Action
Adjusting nut-to-locking Remove and disassemble manual screw O-ring leaks locking screw assembly and replace O-ring. Remove manual locking A ct u a t o r f l u id l e aks Bonnet or adjusting screw assembly, upper around upper or lower nut-to-cylinder cylinder head and end of cylinder. O-ring leaks. cylinder. Replace Orings. Actuator fluid leaks Piston OD or ID O-ring Remove manual locking screw assembly, upper past piston. leaks. cylinder head, cylinder, and piston. Replace O-rings. Actuator fluid leaks out Packing gland OD or ID Bleed all pressure from valve or backseat through bonnet relief O-ring leaks. actuator stem against fitting. bonnet. Disassemble actuator. Remove packing gland and replace O-rings. Actuator fluid leaks around locking screw.
VI. SERVICE AND REPAIR A. Assembly Procedure
Notes:
• Refer to the engineering bill of material for the valve components and valve assembly drawing. • Prior to actual assembly, thoroughly clean all parts. Do not use chlorinated solvents on elastomers. • Apply assembly grease to threads and seal surfaces of all components prior to assembly. Use the grease specified on the bill of material. 1. If applicable, install the locating pins (knurled end first) into the two holes in the bonnet face and stuffing box face of the body. Take care not to upset the outside diameter of the pins. 2. Apply thread dope to the class 3 threaded ends of the bonnet and stuffing box studs and install the studs into their threaded holes in the bonnet face and stuffing box face of the body. 3. Coat the bonnet and stuffing box seal bores and the lower head seal bore with grease.
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4. 2000-10,000 psi WP: Apply Teflon tape to the 1/2 inch NPT male grease fitting threads and install a grease fitting in the bonnet flange grease port and the stuffing box flange grease port. Thread the caps on the fittings hand-tight. 15,000 psi WP: Install a metal-sealing grease fitting in the bonnet and in the stuffing box and make up the fittings with approximately 100 ft lb of torque. Do not use Teflon tape on the threads. Thread the caps on the fittings hand-tight. 5. 2000-5000 psi WP: Install the seal ring in the groove in the face of the stuffing box, using a light coat of grease to secure it. 10,000-15,000 psi WP: Apply a very light coat of grease or a coat of light oil to the stuffing box seal ring and install it in the groove in the body face marked “Stuffing Box”. 6. Slide the stuffing box over the studs on the bottom of the body. The grease fitting must be 90° to the valve bore. 7. Install the stuffing box nuts and tighten them evenly per Table I. Table I: Recommended Stuffing Box Stud Bolt Torque
.
Bolt Size
Torque (ft-lb N m)
3/4" - 10 UNC
200 (270)
7/8" - 9 UNC
300 (410)
1" - 8 UNC
475 (645)
1-1/8" - 8UN
675 (915)
1-1/4" - 8 UN
950 (1290)
1-3/8" - 8 UN
1275 (1730)
1-1/2" - 8UN
1675 (2270)
1-5/8" - 8UN
2150 (2915)
1-3/4" - 8UN
2700 (3660)
8. Apply grease to the retainer plate and place it in the bottom of the valve cavity against the face of the stuffing box.
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9. Install the balance stem in the lower gate neck: Thread and Pin Connection: Thread the stem counterclockwise into the gate neck until it stops against the shoulder. Turn the stem clockwise 1/8 to 3/8 turn until the pin can be inserted through the gate neck to lock the stem in place. Pin-Only Connection: Install the stem in the gate neck, align the pin holes, and insert the pin. 10. Peen over the edges of the hole in two places on each side of the gate neck to retain the pin. 11. Coat lip seal rings with 30 wt. oil and install in the seat grooves. Apply a coating of 30 wt. oil to the body counterbores. Apply a coat of grease to the OD and front seal faces of the seats (no grease should be on the back faces where the lip seals sit). Install the seats into the body counterbores in the cylindrical cavity. The face of the seat with the installed lip seals must be installed against the seal surface of the body counterbore.
Note: If 30 wt. oil is not available, a very light coat of grease may be used, but no buildup of grease on the body counterbore or between the two lip seals can be tolerated, as this could damage parts on assembly. 12. Inspect the leading edge of the gate, which wedges between the seats, for any sharp edges. Verify the lead-in chamfer is smooth and has the proper surface finish. 13. Apply valve grease to both faces and lead-in edge of the gate. 14. Apply grease to the balance stem. 15. Install the gate into the body cavity between the seats taking care to prevent damage to the seats and gate, and making certain that the balance stem is inserted through the retainer plate and into the stuffing box. Due to the preload of the seats against the gate, it may be necessary to drive the gate in with a rubber mallet. 16. Tap the gate down lightly until the balance stem backseats in the stuffing box. 17. Thread the actuator stem counterclockwise into the upper gate neck. 18. 2000-5000 psi WP: Install the seal ring in the groove in the face of the bonnet, using a light coat of grease to secure it. 10,000-15,000 psi WP: Apply a very light coat of grease or a coat of light oil to the bonnet seal ring and install it in the groove in the body face marked “bonnet”.
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19. Slide the bonnet sub-assembly over the bonnet studs and the stem. The grease fitting must be 90° to the valve bore. 20. Install the bonnet nuts and snug them up with a hand wrench. Do not use a hammer wrench or impact wrench at this point. Without the packings installed, the vibration could cause damage to the stem and balance stem seal diameters. 21. For “J”, “U”, or varipak stem packings, apply grease to the packing. Slip the shorter of the two packing installation sleeves over the end of the balance stem. 22. Install the packing over the installation sleeve and into the stuffing box, making certain that the rounded nose of “J” or “U” packing or the cupped end (containing the metal springs) of the varipak faces the valve body. For HT-20 stem packing, see the bill of material for packing installation procedure. 23. Remove the packing installation sleeve and drive the packing into the stuffing box until the stem protector can be fully made up. 24. Install the backup ring (if applicable) over the end of the balance stem and into the stuffing box seal bore against the packing. 25. Thread the stem protector into the stuffing box and make up the protector with approximately 200 ft-lb torque. 26. Install the O-rings and backup rings in the two grooves in the packing gland. The backup rings will be on the sides of the grooves nearest the valve body. Lightly grease the O-rings and backup rings. 27. For “J”, “U”, or varipak stem packings, apply grease to the packing. Apply grease to the actuator stem and slide the longer of the two packing installation sleeves over the end of the stem. 28. Install the packing over the installation sleeve and into the bonnet, making certain that the rounded nose of the “J” or “U” packing or the cupped end (containing the metal springs) of the varipak faces the valve body. For HT-20 stem packing, see the bill of material for packing installation procedure. 29. Remove the packing installation sleeve and drive the packing into the bonnet until the packing gland can be fully made up. 30. Thread the packing gland into the bonnet and make it up with approximately 200 ft-lb of torque. 31. Tighten the bonnet nuts evenly to torque values per Table II on page 20. 32. Install the O-ring and backup ring on the lower head. The backup ring will be on the side of the groove nearest the valve body. Lightly grease the O-ring and backup ring. 33. Install the O-ring and backup rings on the piston. Lightly grease the rings.
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34. Rotate the actuator stem counterclockwise until it stops in the gate neck. 35. Tap the top of the actuator stem to assure that the balance stem is backseated. 36. Thread the piston on the actuator stem and stop it approximately 1/2" from the lower head. 37. Install the locknut loosely on the actuator stem above the piston and again tap the top of the actuator stem with a rubber mallet to assure the balance stem is backseated and make sure the actuator stem is rotated counterclockwise until stopped in the gate neck. 38. Rotate the actuator stem clockwise 1/8 turn. 39. With a wrench on the flats at the top of the actuator stem to prevent stem rotation, rotate the piston clockwise until it contacts with packing gland, then rotate the piston 1/4 turn further clockwise. This pulls the balancing stem off backseat the proper distance. 40. Prevent the actuator stem and piston from rotating and make up the locknut to the top of the piston to approximately 100 ft-lb of torque. 41. Install the centering pin and lock it to the actuator stem with a set screw. 42. Install the cylinder head tiedown studs in the lower cylinder head. The studs should extend no more than one thread below the flange. 43. Install the cylinder over the piston onto the lower cylinder head (either end first - the cylinder is symmetrical). Align the ports with the bonnet grease fitting. 44. Install the O-ring and backup ring onto the adjusting nut. 45. Install the lockscrew-to-adjusting nut O-ring and backup ring. 46. Install the grease fitting in the upper OD of the adjusting nut. Use Teflon tape. 47. Thoroughly grease the lockscrew threads and install the lockscrew in the adjusting nut. Turn the lockscrew counterclockwise until it stops against the internal shoulder. 48. Install the adjusting nut into the upper cylinder head. 49. Install the adjusting nut-cylinder head assembly over the studs onto the cylinder. 50. Install and evenly tighten nuts on the cylinder head studs. Apply recommended torque per step 7. 51. Connect actuating lines to the cylinder. 52. Apply no more than 300 psi actuating pressure to the “open” port to move the piston to its outer limit. The gate will be stopped against the bonnet.
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53. While maintaining cylinder pressure, rotate the adjusting nut clockwise until the adjusting nut contacts the piston. Make sure the locking screw is fully retracted. 54. Bleed off pressure from the “open” port. 55. Apply pressure to the close port to move the piston down. Bleed off pressure. 56. Rotate the adjusting nut 1/8 additional turn clockwise. 57. Apply pressure to the open port. 58. Check for gate bore alignment. 59. If not correct, repeat steps 53 through 57 by resetting adjusting nut. Table II: Recommended Bonnet Stud Torque Valve Size 13
1 /16" 10,000 13
1 /16" 15,000 1
2 /16" 2000 1
2 /16" 3000/5000 1
2 /16" 10,000 1
2 /16" 15,000 9
2 /16" 2000 9
2 /16" 3000/5000 9
2 /16" 10,000 9
2 /16" 15,000 1
3 /8" 2000 1
3 /8" 3000 1
3 /8" 5000 1
3 /16" 10,000 1
3 /16" 15,000 1
4 /16“ 2000 1
4 /16" 3000 1
4 /16" 5000 1
4 /16" 10,000 1
5 /8" 5000 1
5 /8" 10,000 1
3
1
3
1
3
6 /8"/6 /8" 2000 6 /8"/6 /8" 3000 6 /8"/6 /8" 5000
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Bonnet Stud Size - TPI
Recc. Stud Torque ft-lb (N••m)
1.125-8
675 (915)
1.250-8
950 (1290)
.625-11
115 (160)
.875-9
300 (410)
1.125-8
675 (915)
1.250-8
950 (1290)
.750-10
200 (270)
1.000-8
475 (645)
1.250-8
950 (1290)
1.500-8
1675 (2270)
.750-10
200 (270)
.875-9
300 (410)
1.125-8
675 (915)
1.250-8
950 (1290)
1.500-8
1675 (2270)
.875-9
300 (410)
1.125-8
675 (915)
1.250-8
950 (1290)
1.625-8
2150 (2915)
1.375-8
1275 (1730)
1.375-8
1275 (1730)
1.000-8
475 (645)
1.125-8
675 (915)
1.375-8
1275 (1730)
20
B. Stem Packing Replacement 1. With the valve in the closed position, bleed down the actuator cylinder pressure on both the opening and closing sides of the piston. 2. Remove the upper cylinder head, the cylinder head studs, and the cylinder. 3. Remove the piston lock nut. If the valve is equipped with a manual locking screw, the centering pin must be removed prior to removal of the lock nut. 4. Remove the piston by rotating it counter-clockwise and threading it from the stem. 5. Put a wrench on the stem flats and turn the stem clockwise (12 to 34 turns, depending on valve size) until it comes to a full stop. The valve is now backseated in the bonnet and in the Bonnet Grease lo we r b o dy. 1/8" Diameter Pin Fitting Check the posiCap tion of the lower Pressure Pressure In Bonnet Bleed By stem. 6. Test the effectiveness of both backseats.
Grease Fitting Body
SD-10268-99
Figure 1: Low Pressure Grease Fitting (SD-10268-99)
a. Valves rated up to 10,000 psi working pressure. Refer to Figure 1. 1) Remove the grease fitting cap. 2) Trip the ball in the grease fitting check valve by inserting a 1/8" diameter by 3/4" long pin into the run of the fitting. 3) Replace the cap slowly until the ball in the fitting is unseated and the pressure trapped by the backseating process is released. 4) If pressure escapes quickly and then stops, the backseat if effective. Proceed to step 7. 5) If pressure continues to escape, the backseat is ineffective. a) Backseat the valve again. Repeat steps 1 through 5. b) If the backseat continues to be ineffective, contact a Cameron representative. b. Valves rated at 15,000 psi working pressure and above. Refer to figure 2.
Note: The standard grease fitting for 15,000 psi WP FLS valves is a special metal-sealing, high pressure fitting, containing a check valve. The bonnet port housing this fitting is a special preparation without pipe threads which accepts only this type of fitting. Important:
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DO NOT use Teflon tape or thread sealant on these fittings. 21
1) Remove the grease fitting cap.
Grease Fitting Body
Bonnet
Grease Fitting Cap
Pressure
2) Pla c e a In Bonnet wr e n c h o n Pressure Bleed By the h ex Grease Fitting Gland SD-10267-99 Hex Figure 2: High Pressure Grease Fitting (SD-10267-99) prepa ration of the fitting gland and back out the fitting approximately one turn. This procedure unseats the metal seal and vents any pressure on the fitting. 3) If pressure escapes quickly and then stops, the backseat is effective. Proceed to step 7. 4) If pressure continues to escape, the backseat is ineffective. a) Backseat the valve again. Repeat steps 1 through 5. b) If the backseat continues to be ineffective, contact a Cameron representative. 7. Remove the stem protector from the bottom of the body and the packing gland from the lower cylinder head on the bonnet. 8. Attach a grease gun to the fitting in the bonnet or lower stuffing box flange and pump packing out of the stuffing box with grease. 9. Clean grease from the upper and lower stuffing box so that a “hydraulic lock” will not prevent installing new packing. Inspect the stuffing box to determine that the bore is clean, and not pitted or scored. Inspect stems to ensure that the surface is free of burrs and pits. 10. Apply a light coat of grease to stems, stuffing box bores, and stem packings. Install new stem packings per part VI.A.21 through 30 on page 18. 11. Using a wrench on the piston stem flats, thread the stem counter-clockwise (same number of turns counted in step 5 above) until it comes to a full stop. Upper stem is now off back seat. Holding the stem with a wrench on the stem flats so that it cannot turn, thread the piston onto the upper stem until the counterbore in the bottom side of the piston bumps the top of the packing gland. Make up another 1/8 turn. The lower stem is now off backseat, and the lower stop in the piston stroke is set. 12. Replace the cylinder, cylinder studs and nuts, and upper cylinder head. Loosen the set screws in the upper cylinder head and back out the manual override two turns. 13. Apply operating pressure to the lower cylinder port to open the valve. Thread the manual lock screw housing into the cylinder head until it contacts the piston. Make up the lock screw housing another 1/8 turn and run in set screws to lock it. Upper piston stop is now set, and the valve is ready for service. TC1036
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C. Ordering Replacement Parts The only information needed for ordering replacement parts for a Cameron gate valve is the original valve assembly part number and the description of the part. The valve assembly part number is stamped on the valve body nameplate. It is recommended that a description of the valve assembly (size, pressure, trim) be included as a check on the assembly number, but this is not necessary if the assembly number is clearly readable. It is not recommended to order replacement parts by using the part number off the old part or by referring to a file copy of the valve assembly bill-of-material. If an engineering change has been implemented to the valve assembly to replace one component part number with another, the only way to ensure getting the updated component is to reference the valve assembly number and to reference the part by description (gate, seat, stem, etc. Part descriptions are shown in the parts list, Part I.D.). Cameron personnel can then check the latest revision of the assembly bill-of-material to obtain the appropriate and current replacement part number.
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P.O. Box 1212 Houston, TX 77251-1212 Ph: 713-939-2211 Fax: 713-939-2611 http://www.coopercameron.com
' Cooper Cameron Corporation, Cameron Division, Printed in USA 02/99 CRS-C TC1036
