Low Torc Valve [PDF]

Zitiervorschau

OPERATING AND MAINTENANCE INSTRUCTIONS Halliburton Lo Torc® Plug Valve — 1-in. and 1.3-in. Bore Sizes ASSEMBLING THE VALVES 1. Install the seals inside the plug body and the adjusting nut. 2. Install the retaining pins in the body and place an O-ring on the adjusting nut and O-rings on the outside of the inserts. 3. Coat the plug, the inserts, and the adjusting nut threads and fill the void spaces inside the body and the adjusting nut with the recommended plug-valve lubricant (Part No. 70.31058). 4. Place the plug through the adjusting nut. For a 1-in. valve, leave space for the insert lips between the plug and the adjusting nut. 5. Place the inserts on the plug and align the fluid passage holes through the inserts with the hole through the plug. 6. Fasten the plug and the inserts to the adjusting nut with the capscrew and the washers. 7. Place the plug and the inserts into the body with the retaining pins in the body protruding into the slots in the inserts. 8. Screw the adjusting nut into the body while rotating the plug to distribute excess lubricant. 9. Place the handle adapter on the plug with the adapter flow-indicator lugs aligned with the slots on the operating end of the plug. The cutout on the bottom of the handle adapter fits over the stop capscrew. Caution

Assemble these parts properly. Improper assembly of these parts can result in poor valve performance or unsafe operating characteristics.

10. Fasten the handle adapter to the plug with the capscrew and the washers.

ADJUSTING AND OPERATING THE VALVES AT ZERO PRESSURE Set and maintain the plug operating torque at approximately 30 to 40 lb-ft. The operating torque can be decreased by screwing the adjusting nut out of the body, but this setting can allow leakage through the valve. Use the handle adapter on the valve to open and close the valve. The handle adapter on the valve is located on the opposite end from the adjusting end. View operation (opening and closing the valve) from the operating end (the

Parts List 1. Body 2. Handle Adapter 3. Grease Fitting 4. Washer 5. Lockwasher 6. Capscrew 7. Adjusting Nut 8. O-ring 9. Plug Seal 10. Insert (set) 11. O-ring 12. Plug 13. Retaining Pin 14. Washer 15. Stop Capscrew

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Halliburton Lo Torc® Plug Valve – 2-in. and Larger Sizes Because of the Lo Torc Plug Valve’s wide range of application, no specific frequency of maintenance or inservice inspection can be recommended. Periodic, frequent inspections of each valve will help you predict the life or usefulness of the plug and the inserts. Replacing these parts when they are eroded or worn will help prevent any erosion of the body.

DISASSEMBLING AND ASSEMBLING THE VALVES 1. Remove the wrench (Loc. 15) or the handle adapter (Loc. 2) with the stop collar (Loc. 14). 2. Loosen the adjusting nut with the operating bar or the hex wrench. Remove the adjusting nut, the plug (Loc. 12), and the inserts (Loc. 10). If necessary, place a wood block on top of the plug stem and tap downward. 3. Inspect the valve body (Loc. 1) for interior erosion or pitting. Caution

If seal surfaces have deteriorated, remove the valve from service. Otherwise, leakage could result.

4. Replace the O-rings (Loc. 11) on the inserts if necessary. handle-adapter end) where a clockwise rotation closes the valve. The flow-indicator lugs on the handle adapter indicate the direction of the fluid hole through the plug. Keep the flow-indicator lugs in line with the flowindicator slots on the plug.

MAINTAINING AND INSPECTING THE VALVES To repair valves in the line, remove the handle adapter and screw the adjusting nut counterclockwise. It is not necessary to remove the plug from the adjusting nut if the plug is still serviceable. Assemble new inserts with O-rings on the plug as described in Step 4 on Page 1. Caution

Caution

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Do not weld the bodies of valves. Valve bodies are made of heat-treated alloy steel that should not be welded. Since the inserts can wash out and erode the body before leakage is noted, inspect valves regularly to determine the approximate life of the inserts and plugs. Continued use of worn plugs and inserts will shorten the life of the body considerably.

5. Replace the O-ring sealing the adjusting nut if the O-ring is worn. 6. Replace the plug-stem packing (Loc. 9) at the top and bottom of the plug if necessary. 7. Replace the inserts with standard parts if the valve has shown signs of leakage or if the inserts show any excessive wear or pitting. 8. Wipe all old lubricant from inside the valve body.

REASSEMBLING THE VALVE 1. Install O-rings in the recesses of the inserts and in the adjusting nut groove. 2. Install the plug stem seals (Loc. 9) in the recesses in the top of the valve body and in the adjusting nut. 3. Coat the cleaned plug, the inserts, and the adjusting nut threads with the recommended plug-valve lubricant. Fill the void spaces inside the valves with the same lubricant. This lubricant can be ordered in 3/4-lb packages under Part No. 70.31058. 4. Install the lower end of the plug through the adjusting nut and push the plug down to the shoulder.

5. Use the capscrews, the flat washer, and the lock washer to secure the adjusting plug to the adjusting nut. 6. Tighten the capscrew. 7. Verify that the insert retaining pins (Loc. 13) inside the body are positioned properly.

Extremely high working pressures can require higher torque values to properly seal the valve. If so, this higher torque adjustment should be maintained by checking the adjusting nut at regular intervals. Caution

Do not weld the bodies of valves. Valve bodies are made of heat-treated alloy steel that should not be welded.

Caution

Since the inserts can wash out and erode the body before leakage is detected, inspect valves regularly to determine the approximate life of the inserts and plugs. Continued use of worn plugs and inserts will shorten the life of the body considerably.

8. Place the inserts on the adjusting nut around the plug. 9. Align the flow holes in the inserts with the hole through the plug. 10. Place the plug, the inserts, and the adjusting nut into the valve body so that the insert retaining pins slide into the slots in the inserts. 11. Tighten the adjusting nut into the body with the prescribed torque for adequate sealing (see Adjusting the Valve at Zero Pressure), rotating the plug while tightening it to distribute the lubricant. 12. Install the stop collars and the handle adapter (or wrench) on top of the valve. Be sure the flow indicator lugs of the handle adapter are aligned with the slot in the top stem of the plug. Note:

Improper assembly of these parts can result in poor valve performance or unsafe operating characteristics.

13. Lubricate the valve through the grease fitting (Loc. 3) on top of the valve body (if the valve has a fitting) to ensure total filling of the void spaces inside the valve.

ADJUSTING THE VALVE AT ZERO PRESSURE Adjusting a Lo Torc® Plug Valve properly is imperative to maintain tight sealing under pressure. The inserts should be adjusted to provide the torque to rotate the plug. [This adjustment is made by tightening or loosening the adjusting nut (Loc. 7).] Table 1—Adjusting the Valve at Zero Pressure Valve Size (in.)

Torque (lb-ft)

1

30 to 40

1.3

40 to 60

2

40 to 60

2 /2

1

50 to 60

3

60 to 70

4

70 to 80

Note:

Valves with Teflon material-lined inserts should be adjusted to approximately two-thirds of the torque ratings in Table 1.

Table 2—Lo Torc Plug Valves Repair Kits Size in. (mm) 1 (25.4) 1 (25.4) 1 (25.4) 1 (25.4) 1.3 (33.0) 1.3 (33.0) 1.3 (33.0) 1.75 (44.6) 1.75 (44.6) 2 1/16 (52.4) 1 2 /16 (52.4) 1 2 /16 (52.4) 1 2 /16 (52.4) 3 1/8 (79.4) 1 3 /8 (79.4) 1 3 /8 (79.4) 1 3 /16 (77.8) 3 1/16 (77.8) 1 3 /16 (77.8)

Type of Services

Type of Plug

Type of Insert

Type of Seals

STD

Stnls

Iron

Nitrile

H2S

Monel

Al Brz

Teflon

H2S

Monel

Al Brz

Viton

STD

Monel

Iron

Nitrile

STD

Stnls

Al Brz

Nitrile

H2S

Monel

Al Brz

Teflon

H2S

Monel

Al Brz

Viton

STD

Stnls

Al Brz

Nitrile

STD

Monel

Al Brz

Nitrile

STD

Stnls

Iron

Nitrile

STD

Monel

Iron

Nitrile

H2S

Monel

Al Brz

Teflon

H2S

Monel

Al Brz

Viton

STD

Stnls

Iron

Nitrile

H2S

Monel

Al Brz

Teflon

H2S

Monel

Al Brz

Viton

H2S

Monel

Al Brz

Teflon

STD

Stnls

Al Brz

Nitrile

H2S

Monel

Al Brz

Viton

®

®

®

®

®

Part No. 9.12791 9.12796* 9.12792 9.12797* 9.12793 9.12798* 9.12794 9.12796* 9.82052 9.82056* 9.82053 9.82057* 9.82054 9.82058* 9.12612 9.12615* 9.12613 9.12615* 9.82601 9.82624* 9.82604 9.82624* 9.82605 9.82636* 9.82606 9.82625* 11.51590 11.51603* 11.51591 11.51605* 11.51601 11.51604* 11.92106 11.92119* 11.92108 11.92117* 11.92109 11.92118*

*Includes seals and O-rings only.

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Table 3—Lo Torc Replacement Parts List Valve Bore Size and Maximum Working Pressure Loc. No.

Description

Quantity Required

1-in. 15,000 Std 10,000 H2S

1.3-in. 20,000 Std 15,000 H2S

1.75-in. 15,000 Std 15,000 H2S

2-in. 10,000 Std 10,000 H2S

2.56-in. 5,000 Std 5,000 H2S

3.12-in. 5,000 Std 5,000 H2S

3.06-in. 15,000 Std 10,000 H2S

4.06-in. 5,000 Std 5,000 H2S

1 1 1

9.12316 9.12773 9.12345

9.41382 9.81991 9.41398

9.12602 9.12673 9.12634

9.81913 9.50984 9.82628

10.62014 10.50432 10.62019

11.92034 11.51083 11.51610

11.92097 11.50913 11.92121

12.30012 12.30018 12.30026

1 Set 1 Set

9.12308 9.12704

— 9.41384

— 9.12603

9.81914 9.82608

10.62013 10.62018

11.92033 11.92044

— 11.92092

12.30015 12.30025

12a

Plug (Stnls 410/414) Plug (Monel) Plug (316 Stnls)

10

Insert (2 per set) Ductile Iron or Cast Iron Aluminum Bronzeb

9

Plug Stem Seal (Nitrile) Plug Stem Seal (Teflon)c,d

2 2

9.12302 8.75096

9.12302 8.75096

9.81715 9.81916

9.81715 9.81932e

9.81715 9.81916

9.81715 9.81916

9.81715 9.81932

9.81715 9.81932

11

O-ring Insert (Nitrile) O-ring Insert (Teflon)c,f

2 2

8.33963 70.90699

8.34021 70.33790

8.34026 70.34087

8.34027 70.33784

8.34031 70.33743

8.33985 70.33746

8.33985 70.33746

8.33796 70.33192

8

O-ring Adjusting Nut (Nitrile) O-ring Adjusting Nut (Teflon)c,f

1 1

8.34033 70.33786

8.34037 70.33792

8.34041 70.33755

8.34042 70.34086

8.34051 70.33745

8.34056 70.33748

8.34056 70.33744

8.34082 70.33894

Insert Retaining Pins Insert Retaining Rings

2 2

70.36029 —

70.36029 —

70.36029 —

70.36029 —

70.36029 —

70.36029 —

70.36029 70.35956

9.72786 —

13 16g a

Monel material and 316 Stainless are for H2S service. Stainless 410/414 are for standard service.

b

Aluminum bronze is suitable for standard use or H 2S service.

c

Teflon material plug stems and Teflon material O-rings are used in H2S service valves.

d

Plug stem seals are made of Viton® material with a stainless steel backup ring: 8.75094 for 1-in. and 1.3-in. sizes; 9.81717 for other sizes. Listed seal fits seal glands of 0.5-in. depth. For glands 0.25-in. depth, use Teflon material seal Part No. 9.81916. f Viton® O-rings are Part No. 7.xxxxx where xxxxx are the same five digits after the decimal point of the Nitrile O-ring part number. g Valves with a pin part number for Loc. 16 are inside pin Loc. 13. e

Table 4—Lo Torc Accessories Description

Valve Size

Cat. No.

Wrench

2-in., 2 1/2-in., 3-in., and 4-in. regular opening

9.41343

Handle Adapter

2-in., 2 1/2-in., 3-in., and 4-in. regular opening

9.50822

Operating Bar

All sizes except 4-in. full opening

9.81713

Operating Wrench

4-in. full opening only

12.69045

HES Stick Lubricant

All sizes (12 sticks per carton)

70.31058

Grease Fitting

All sizes

70.22943

Grease Gun

All sizes

70.24776

Table 5—LoTorc Kit Contents Part Plug Inserts O-ring (Inserts) O-ring (Adj. Nut) Seals (Stem) Lubricant Instructions

Quantity 1 1 set 2 1 2 1 1

Sales of Halliburton products and services will be in accord solely with the terms and conditions contained in the contract between Halliburton and the customer that is applicable to the sale. Part No. 70.31059-A

© 1999 Halliburton Company

Printed in U.S.A.