Samson 3271 Mounting And Operating Instructions

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Samson 3271 Mounting And Operating Instructions Manual pdf 41 page image

EB 8052 EN 7-1Operation7 OperationImmediately after completing start-up or put-ting the valve back into operation (see the'Start-up' section), the valve is ready for use.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.Î Allow components and pipelines to cooldown or heat up.Î Wear protective clothing and safetygloves.Risk of personal injury due to pressurizedcomponents and process medium escapingunder pressure.Î Do not loosen the screw of the test con-nection while the valve is pressurized.Risk of hearing loss or deafness due to loudnoise.Noise emission (e.g. cavitation or flashing)may occur during operation caused by theprocess medium and the operating condi-tions. Additionally, a brief loud noise mayoccur through the sudden venting of thepneumatic actuator (see 'Fail-safe position')or pneumatic valve accessories not fitted withnoise-reducing fittings. Both can damagehearing.Î Wear hearing protection when workingnear the valve.Crush hazard arising from actuator andplug stem moving.Î Do not insert hands or finger into theyoke while the air supply is connected tothe actuator.Î Before working on the control valve, dis-connect and lock the pneumatic air sup-ply as well as the control signal.Î Do not impede the movement of the actu-ator and plug stem by inserting objectsinto the yoke.Î Before unblocking the actuator and plugstem after they have become blocked(e.g. due to seizing up after remaining inthe same position for a long time), re-lease any stored energy in the actuator(e.g. spring compression). See associat-ed actuator documentation.Risk of personal injury due to exhaust airbeing vented.While the valve is operating, the actuator orvalve accessories may vent during closed-loop control or when the valve opens orcloses.Î Wear eye protection when working inclose proximity to the control valve.WARNING!WARNING!WARNING!WARNING! WARNING!WARNING! WARNING!