Variants
These valves are designed for flow over the seat (port 1 to 2). A pneumatic signal acts on the actuator piston to open the valve, and it closes via a spring return action.
Designed for flow under the seat (port 2 to 1). These can be used to prevent water hammer on valve closure in liquid applications.
These are Normally Closed valves designed for special applications requiring flow in both directions (port 1 to 2 or port 2 to 1). They incorporate an anti-water hammer design for liquid applications flowing under the seat.