Samson 3271 Original Instructions Manual

Also see for 3271: Mounting and operating instructions Mounting and operating instructions Mounting and operating instructions Mounting and operating instructions Mounting and operating instructions

Contents

EB 8310-6 EN 10-1Decommissioning10 DecommissioningThe work described in this section is only tobe performed by personnel qualified for theassignment accordingly.Risk of bursting due to incorrect opening ofpressurized equipment or components.Pneumatic actuators are pressure equipmentthat may burst when handled incorrectly.Flying projectile fragments or componentscan cause serious injury or even death.Before working on the actuator:Î Depressurize all plant sections concernedand the actuator. Release any stored en-ergy.Risk of personal injury due to preloadedsprings.Actuators with preloaded springs are undertension. These actuators can be identified byseveral longer bolts with nuts protrudingfrom the bottom diaphragm case. Actuatorswith considerably preloaded springs are alsolabeled correspondingly (see the 'Markingson the device' section).Î Only open the actuator following the in-structions in this document. See 'Reliev-ing the spring compression in the actua-tor' in the 'Removal' section.Risk of personal injury due to exhaust airbeing vented.The actuator is operated with air. As a result,air is vented during operation.Î Wear eye and hearing protection whenworking near the actuator.Crush hazard arising from the moving actu-ator stem.Î Do not insert hands or finger into theyoke while the air supply is connected tothe actuator.Î Before working on the actuator, discon-nect and lock the pneumatic air supplyas well as the control signal.Î Do not impede the movement of the actu-ator stem by inserting objects into theyoke.Î Before unblocking the actuator stem afterit has become blocked (e.g. due to seiz-ing up after remaining in the same posi-tion for a long time), release any storedenergy in the actuator (e.g. spring com-pression). See 'Relieving the spring com-pression in the actuator' in the 'Removal'section.To decommission the actuator for servicework or before removing it from the valve,proceed as follows:1. Put the control valve out of operation.See associated valve documentation.2. Disconnect the pneumatic air supply todepressurize the actuator.DANGER!WARNING!WARNING! WARNING!WARNING! WARNING!