Samson 3510 Mounting And Operating Instructions

Also see for 3510: Mounting and operating instructions

38 EB 8091-1 ENServicing7.3 Replacing the seat andplugRisk of control valve damage due to incorrectservice or repair.Seat and plug can only be replaced when allthe following conditions are met:− The valve does not have a bellows seal.To replace seat and plug in other valve ver-sions, contact SAMSON's After-sales Servicedepartment.Incorrect control due to a combination oftrim parts that do not match each other.The trim parts (seat, plug, anti-rotation fix-ture, and body gasket) are matched to ex-actly fit each other. The anti-rotation fixturemust also be exchanged on replacing theseat and plug. The trim parts are deliveredtogether and marked accordingly (see sec-tion 2.3).Only install matching trim parts.Risk of damage to the facing of the seat andplug due to incorrect service or repair.− Always replace both the seat and plug.− Only install matching trim parts (see sec-tion 2.3).7.3.1 Standard version1. Remove the actuator from the valve. Seeassociated actuator documentation.2. Loosen the slotted nut (11) at the valve.Remove the yoke (13) from the interme-diate piece (4).3. Unscrew the fillister head screw (6) onthe anti-rotation fixture (2.4). Remove theanti-rotation fixture (2.4) from the inter-mediate piece (4).4. Unscrew the intermediate piece (4) fromthe body (1). Remove the intermediatepiece (4) together with plug (2.1) fromthe body (1).5. Replace gasket as described in sec-tion 7.1.1.6. Unscrew the hex nuts (20) from the plugstem (2.1). Remove the stem connectorparts.7. Unscrew the threaded bushing (12).8. Replace the packing. See section 7.2.9. Unscrew the seat (2.2) using a suitabletool.10. Apply a suitable lubricant to the threadand the sealing cone of the new seat.11. Screw in the seat (2.2) using a suitabletool. Observe tightening torques.12. Pull the plug with plug stem (2.1) out ofthe intermediate piece (4).13. Apply a suitable lubricant to the newplug stem (2.1) and thread of the inter-mediate piece (4).14. Slide the new plug with plug stem (2.1)into the intermediate piece (4).NOTICE!NOTICE!NOTICE!