Samson 3251 Mounting And Operating Instructions

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Samson 3251 Mounting And Operating Instructions Manual pdf 31 page image

EB 8052 EN 31Mounting and start-up− Remove the mounted actuator beforemounting the other actuator (see associat-ed actuator documentation).− Preloading the actuator springs increasesthe thrust of a pneumatic actuator and re-duces the travel range of the actuator (seeassociated actuator documentation).5.2 Installing the valve into thepipeline5.2.1 Checking the installationconditionsPipeline routingThe inlet and outlet lengths vary dependingon the process medium. To ensure the controlvalve functions properly, follow the installa-tion instructions given below:Î Observe the inlet and outlet lengths (seeTable 5). Contact SAMSON if the valveconditions or state of the medium processdeviate.Î Install the valve free of stress and with theleast amount of vibrations as possible. Ifnecessary, attach supports to the valve.Î Install the valve allowing sufficient spaceto remove the actuator and valve or toperform service and repair work onthem.Mounting positionGenerally, we recommend installing thevalve with the actuator upright and on top ofthe valve.In the following versions, the valve must beinstalled with the actuator on top:− Valves in NPS 4 and larger− Valves with insulating section for lowtemperatures below –10 °C (14 °F)Î Contact SAMSON if the mounting posi-tion is not as specified above.Support or suspensionDepending on the valve version and mount-ing position, the control valve and pipelinemust be supported or suspended. The plantengineering company is responsible in thiscase.Premature wear and leakage due to insuffi-cient support or suspension.In the following versions, the control valvemust be supported or suspended:− Valves that are not installed with the actua-tor in the upright position on top of thevalve.Attach a suitable support or suspension tothe valve.Vent plugsVent plugs are screwed into the exhaust airports of pneumatic and electropneumatic de-vices. They ensure that any exhaust air thatforms can be vented to the atmosphere (toavoid excess pressure in the device). Further-NoteNOTICE!