brands you trust. CRANE ChemPharma, Xomox Top Seal Replacement Instructions For Sleeved Plug Valves

Transcription

1 brands you trust. CRANE ChemPharma, Xomox Top Seal Replacement Instructions For Sleeved Plug Valves

2

3 Reassembly. 1. Replace the plug in the valve body with the ports in the open position. If the PTFE diaphragm is taped to the assembly cone tool, it should not be removed until necessary. If it is removed for more than a 10 minute period, the natural built-in resilience of the sealing lip will make reinsertion onto the cone very difficult. Some sizes of PTFE diaphragms do not require storage on the assembly cone tool, and are not taped to it for shipment. 2. Install wedge ring onto plug stem with the flat side facing down. Inspection. See drawing above. For best sealing results, inspect the following components: 1. The seal surface on the plug stem. 2. The plug surface. 3. The seal surface on the cover. 4. The body seal surface that mates with the cover. 5. The sleeve. These surfaces should be free from defects, which are typically caused by corrosion, erosion, improper handling, or improper storage of a disassembled valve. If defects are found on any of these parts, the valve must not be repaired. Copyright Xomox Corporation 1999, All rights reserved. Xomox, Tufline, and Matryx, are registered trademarks of Xomox Corporation. XRP is a trademark of Xomox Corporation. Top Seal Replacement Kit Static Eliminator (1/2-4 inch only) Thrust Collar Metal Diaphragm Formed PTFE Diaphragm Assembly Cone Tool Wedge Ring Plug (Not included in Kit) 3. Place assembly cone tool with formed PTFE diaphragm over plug stem. (In valves that have a threaded stud atop the plug stem, it will be necessary to make a 5/16-inch diameter hole through the crown of the assembly cone tool to allow the cone to rest on the top of the plug stem). 4. If applicable, remove the tape from the formed PTFE diaphragm. 5. Push the formed PTFE diaphragm over taper on assembly cone tool and onto plug stem, being sure to evenly distribute the pushing force on the crown of the diaphragm is to prevent back rolling and damage to the sealing lip. When installing the formed PTFE diaphragm, the thrust collar may be used as a pushing tool to push the diaphragm over the taper and onto the largest diaphragm of the assembly cone tool. The thrust collar can now be set aside. Continue pushing the diaphragm over assembly cone tool and onto plug stem. 6. Check to see that the wedge ring has seated properly inside the crown of the formed PTFE diaphragm. 7. Remove and discard assembly cone tool.

4 8. Install the metal diaphragm. 9. Install the thrust collar with flat side facing up. 10. On 1/2 through 4 inch valves, install the static eliminator with thin lip facing down. (Not required on actuated valves) 11. Back out adjustment bolts or screws to within one thread of bottom of cover bore. 12. Install the cover. To facilitate tightening of the cover bolts, press the plug into the body with an arbor press until the bottom of the plug port opening is 1/16 inch above the bottom of the valve body port opening. Do not apply force to the cover as this may damage the formed PTFE diaphragm. 13. Check to see that the metal diaphragm is centered in the valve body counter-bore. 14. Tighten the cover bolts alternately (criss-cross pattern as shown above) and uniformly to the torque values shown below. Bolt Size (inches) Foot-Pounds 5/ /8 20 7/ /2 45 5/8 95 VALVE DAMAGE. DO NOT exceed torque values. Personal injury and property damage may result. 15. Tighten the adjusting bolts uniformly in 1/4 turn increments until contact is made, then tighten an additional 1/4 turn. 16. Replace the hub and wrench (or bracket and E.G. actuator) and rotate the plug. 17. Compare the valve torque against the values listed below. 18. Before being placed back into service, the valve should be tested to ensure it does not leak. Operating torques. Normal running torques may be less than the values shown in the tables below. Valve torque may be greater if the valve is used to control a highly viscous or abrasive medium. Sleeved Plug Valve Operating Torque (in-lbs) Virgin Teflon (PTFE) Sleeves Valve Size Break Torque Seating Torque Running Torque T B T S T R ½ ¾ ½ Torque Adjustment Factors: T = F T x (T B, T S, T R ) 1. For Tufline-475 Sleeves: F T = For Glass-Filled TFE: F T = For Tufline-600 Sleeves: F T = For Xomox 7 Sleeves: F T = For PFA Sleeves: F T = For UHMWPE Sleeves: F T = For Slurry or Abrasive Service: F T = 1.5 If satisfactory results have not been obtained, consult your nearest Xomox Service Center. More information. Xomox publishes a comprehensive catalog which details the unique and patented features of the Tufline Sleeved Plug Valve. To receive a copy call or visit our website: 3/4 130

5 CRANE ChemPharma Flow Solutions XOMOX Headquarters 4444 Cooper Road, Cincinnati, OH 45242, U.S.A. Tel.: (513) Fax: (513) XOMOX International GmbH & Co. OHG Von-Behring-Straße 15, D Lindau/Bodensee Tel.: (49) Fax. (49) brands you trust. CRANE ChemPharma Flow Solutions Include: Pipe - Valves - Fitting - Actuators - Pumps CP-XOMOX-SPV-IOM-IM-EN-CI-7/05 - PN Crane Co., and its subsidiaries cannot accept responsibility for possible errors in catalogues, brochures, other printed materials, and website information. Crane Co. reserves the right to alter its products without notice, including products already on order provided that such alteration can be made without changes being necessary in specifications already agreed. All trademarks in this material are property of the Crane Co. or its subsidiaries. The Crane and Crane brands logotype (DEPA, ELRO, Krombach, PSI, Resistoflex, ResistoPure, Revo, Saunders, and XOMOX ) are registered trademarks of Crane Co. All rights reserved CRANE ChemPharma Flow Solutions,