Aseptic pneumatic seat valve
W2xx series Waukesha Cherry-Burrell

Fit your pump with an external over-pressure relief valve. If pump discharge pressure exceeds the set cracking-pressure, the valve will open to a relief path. The Adjustable-Spring actuator lets you set the desired relief cracking pressure right at the valve by simply turning the adjustment screw (see below). Three diameters are available: 4", 5" and 6" for both air-to-raise (AR) on 1.5" – 4" WR61 valves, and air to lower (AL) on 2"-4" WR63 valves. Tef-Flow PEEK™ or metal seats are required for strength and durability. A stem flush is also available on WR80 pressure relief valves for aseptic applications.

For clean-in-place applications (CIP), a piston in the actuator allows opening of the valve without having to over pressure it. After relieving or CIP is complete, the valve reseats in place.

Exterior Adjustment with sealed cap to safeguard threaded area.
No exposed threads!

Positive-Stop prevents overloading of spring and engages with the
sealed cap to lock in the setting.
Cracking pressure adjustment range from zero (fully unloaded) to maximum published holding pressure of standard, heavy-sprinq actuators.
Piston for full opening/ by-pass
Heavy-duty construction with (3) bearing locations and sealed,
welded construction.