Samson 3525 Mounting And Operating Instructions

36 EB 8823 ENMaintenance7.1.2 Replacing the packingRisk of valve damage due to abrasion.The plug and seat facings are very sensitive.Before unscrewing the bonnet from the body,apply a signal pressure to the actuator toslightly lift the plug off the seat. This preventsthe plug and seat from being damaged.1. Bend down the flap of the tab washer(224).2. Apply a signal pressure to the actuator toslightly lift the plug off the seat. Unscrewthe bonnet (2).3. Lift bonnet (2) and plug with plug stem(5) off the body (1). Remove tab washer(224).4. Unscrew guide bushing (7) placing asuitable tool on the flats.5. Remove stem connector clamp (A28).See associated actuator documentation.It is not necessary to completely remove theactuator from the valve to replace the pack-ing.6. Pull the plug with plug stem (5) out of thebonnet (2).7. Pull all the packing parts out of the pack-ing chamber using a suitable tool.8. Replace damaged parts. Clean the pack-ing chamber thoroughly.9. Apply a suitable lubricant to the guidebushing (7), to all the packing parts andto the plug stem (36).10. Slide guide bushing (7) and packingparts over the plug stem. Make sure youobserve the proper order (see Fig. 10).11. Carefully insert plug with plug stem,packing parts and guide bushing into thebonnet.NOTICE!Note70…100°Flap of tab washerEnd positionBent flapFig. 9: Mounting the bonnet onto the body