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WILLIAMS CONTROLS Part Description
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 in the WM147 series. The normally open WM147 relays are available either as two-way valves without an exhaust mode or as three-way valves if the exhaust mode is desired. The WM147 series are noted for their compact size.