WM521 - Activair Controllers

Product Brand: Williams Controls

Four-way precision regulating valves which are factory assembled into banks of up to five units.


The WM-521 series controllers are four-way precision regulating valves which are factory assembled into banks of up to five units. For plumbing convenience, WM-521 models with two or more valve units have a single inlet and a common exhaust port. WM-521 control levers spring return to the neutral position when released and are designed with push-to-connect fittings. Special models are available for field replacement of WM-501 units.

WM521 - Activair Controllers
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