1.5" Tri-Clamp Butterfly Valve - Spring-Return Pneumatic Actuator Normally ClosedThe Wayland Industries 1. 5" Butterfly Valve with Spring Return Actuator is a professional grade sanitary component for automated brewery and food processing systems. This valve features a vertical canister actuator that is Normally Closed (NC); it uses air pressure to open and automatically returns to the closed position via spring tension if air pressure is lost. Constructed from 304 Stainless Steel with durable EPDM seals, it provides a sanitary