Samson 3251 Mounting And Operating Instructions

Also see for 3251: Mounting and operating instructions Mounting and operating instructions Mounting and operating instructions Mounting and operating instructions Mounting and operating instructions

Samson 3251 Mounting And Operating Instructions Manual pdf 41 page image

EB 8052 EN 41Servicingcrisscross pattern. Observe tighteningtorques.8. Mount actuator. See associated actuatordocumentation.9. Adjust lower or upper signal benchrange. See associated actuator docu-mentation.7.1.2 Version with insulatingsection or bellows seal1. Remove the actuator from the valve. Seeassociated actuator documentation.2. Undo the body nuts (14) gradually in acrisscross pattern.3. Lift the insulating section (21) and plugwith plug stem (5) off the body (1).4. Remove the gasket (17). Carefully cleanthe sealing faces in the valve body (1)and on the insulating section (21).5. Insert a new gasket (17) into the body.6. Place the insulating section (21) onto thebody.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 5.1.7. 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.8. Mount actuator. See associated actuatordocumentation.9. Adjust lower or upper signal benchrange. See associated actuator docu-mentation.7.2 Replacing the packingRisk of control valve damage due to incorrectservice or repair.The packing can only be replaced when allthe following conditions are met:− The valve size is ≤NPS 4.− The valve does not have a balanced plug.− The valve does not have a bellows seal.− The standard or ADSEAL packing is in-stalled in the valve.To replace the packing in other valve ver-sions, contact SAMSON's After‑sales Servicedepartment.7.2.1 Standard versionStandard packing (PTFE)1. Remove the actuator from the valve. Seeassociated actuator documentation.2. Unscrew the castellated nut (92) and liftthe yoke (3) off the flange (2).3. Undo the body nuts (14) gradually in acrisscross pattern.4. Lift the flange (2) and plug with plugstem (5) off the body (1).5. Unthread the stem connector nut (9) andlock nut (10) from the plug stem.6. Unscrew the threaded bushing (8).NOTICE!