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.
