Elctro-pneumatic Positioners Clause Samples

Elctro-pneumatic Positioners. Smart type Valve Positioners shall be used, except where local pneumatic contol is required. Pneumatic valve positioners for diaphragm actuators will generally have bypass switches and three pressure gauges. On split-range applications and piston actuators positioner bypass switches shall be omitted Smart Electropneumatic positioners shall be used except for high vibration service. For high vibration service, use a separately mounted I/P transducer and a valve mounted pneumatic positioner. I/P transducers shall work in any orientation.