Samson 3525 Mounting And Operating Instructions

48 EB 8823 ENDecommissioning and disassembly9 Decommissioning anddisassemblyRisk of bursting in pressure equipment.Control valves and pipelines are pressureequipment. Improper opening can lead tovalve components bursting.− Before starting any work on the controlvalve, depressurize all plant sections con-cerned and the valve.− Drain the process medium from all theplant sections concerned as well as thevalve.− Wear personal protective equipment.Risk of personal injury due to sudden escapeof process medium.The valve has a safety bleed to detect dam-aged or worn O-rings. The process mediummay escape suddenly and at high pressure.− Wear protective clothing, gloves and eye-wear when working near or on the valve.− Do not stay in the range of the safety bleedlonger than necessary.Risk of personal injury due to residual pro-cess medium in the valve.While working on the valve, residual processmedium can escape and, depending on itsproperties, may lead to personal injury, e.g.(chemical) burns.Wear protective clothing, gloves and eye-wear.Risk of burn injuries due to hot or cold com-ponents and pipeline.Valve components and the pipeline may be-come very hot or cold. Risk of burn injuries.− Allow components and pipelines to cooldown or heat up.− Wear protective clothing and gloves.9.1 DecommissioningTo decommission the control valve for serviceand repair work or disassembly, proceed asfollows:1. Interrupt the medium flow.2. Completely drain the pipelines andvalve.3. Disconnect and lock the pneumatic airsupply to depressurize the actuator.4. If necessary, allow the pipeline and valvecomponents to cool down or heat up.9.2 Removing the valve fromthe pipelineVersion with flanges1. Put the control valve out of operation (seesection 9.1).2. Unbolt the flange joint.3. Remove the valve from the pipeline (seesection 4.2).DANGER!WARNING!WARNING!WARNING!