The Adjustable-Spring actuator lets you set the desired relief cracking pressure right at the valve by simply turning the adjustment screw (see graphics above). Three diameters are available: 4", 5" and 6" (102mm, 127mm and 152mm) for both air-to-raise (AR) on 1.5" – 4" (38mm - 102mm) W61 valves and air to lower (AL) on 2" - 4" (51mm - 102mm) W63 valves. Tef-Flow PEEK™ or metal seats are required for strength and durability.
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.