Williams 111542 WM147P Normally Open Relay Valve

A variety of normally open, non-compensating relay valves are available in the WM147 series. Control pressure is used to close these normally open valves; the required control pressure signal differs with each model. These relays are available either as two-way valves without an exhaust mode is desired. As shown in the installation drawing, the three-way models are used with a two-position control valve in applications where a four-way function is desired.

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