Samson 3251 Mounting And Operating Instructions

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Samson 3251 Mounting And Operating Instructions Manual pdf 48 page image

48 EB 8052 ENServicing7.3.2 Version with insulatingsection1. Remove the actuator from the valve. Seeassociated actuator documentation.2. Unscrew the castellated nut (92) and liftthe yoke (3) off the insulating section(21).3. Undo the body nuts (14) gradually in acrisscross pattern.4. Lift the insulating section (21) togetherwith the plug stem and plug (5) off thebody (1).5. Replace the gasket as described in sec-tion 7.1.2.6. Unthread the stem connector nut (9) andlock nut (10) from the plug stem (5).7. Unscrew the threaded bushing (8).8. Pull the plug with plug stem (5) out of theinsulating section (21).9. Pull all the packing parts out of the pack-ing chamber using a suitable tool.10. Make sure that the guide bushing (7) isnot damaged. If necessary, replace theguide bushing using a suitable tool.11. Unscrew the seat (4) using a suitabletool.12. Apply a suitable lubricant to the threadand the sealing cone of the new seat.13. Screw in the seat (4). Observe tighteningtorques.14. Apply a suitable lubricant to all the pack-ing parts and to the new plug stem (5).We recommend replacing the packing aswell. See section 7.2.2.15. Slide the new plug with plug stem (5) in-to the insulating section (21).16. Place the insulating section (21) togetherwith the plug stem and plug (5) onto thebody (1).Version with V-port plug: place the insu-lating section (21) onto the valve body,making sure that the largest V-shapedport of the V-port plug faces toward thevalve outlet. See section 5.1.17. Carefully slide the packing parts over theplug stem extension into the packingchamber using a suitable tool. Observethe proper sequence (see Fig. 6).18. Firmly press the plug (5) into the seat (4).Fasten down the insulating section (21)with the body nuts (14). Tighten the nutsgradually in a crisscross pattern. Ob-serve tightening torques.19. Screw in the threaded bushing (8) andtighten it. Observe tightening torques.20. Place yoke (3) on the insulating section(21) and fasten tight using the castellatednut (92).21. Loosely screw the lock nut (10) and stemconnector nut (9) onto the plug stem.22. Mount actuator. See associated actuatordocumentation.23. Adjust lower or upper signal benchrange. See associated actuator docu-mentation.