Samson 3525 Mounting And Operating Instructions

EB 8823 EN 33MaintenanceRisk of valve damage due to incorrect main-tenance or repair.Service and repair work must only be per-formed by trained staff.Risk of valve damage due to excessively highor low tightening torques.Excessively tightened torques lead to partswearing out quicker. Parts that are too loosemay cause leakage.Observe the specified tightening torques (seeTable 5 and Table 6).Risk of valve damage due to the use of un-suitable lubricants.The lubricants to be used depend on thevalve material. Unsuitable lubricants maycorrode and damage the valve surface.Only use lubricants approved by SAMSON(see parts list).The control valve was checked by SAMSONbefore it left the factory.− Certain test results (seat leakage and leaktest) certified by SAMSON lose their validi-ty when the valve body or actuator hous-ing is opened.− The product warranty becomes void ifmaintenance or repair work not describedin these instructions is performed withoutprior agreement by SAMSON’s After-salesService department.− Only use original spare parts bySAMSON, which comply with the originalspecifications.7.1 Standard version7.1.1 Replacing the O-ringsRisk 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.It is not necessary to remove the actuatorfrom the valve to replace the O-rings.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. Remove O-rings (17) from the bonnet (2)and carefully clean the grooves.>Class 900 with FKM O-ring: Removesupport ring (244).NOTICE!NOTICE!NOTICE!NoteNOTICE!Note