When the swing check valve is completely closed, the gate and segment are wedged tightly against each seat. During operation, the gate and segment retract from the seats before travel. This retraction reduces wear on the resilient seat material and protects sealing.
- Full bore/through-conduit
- Repeated positive shut-off
- Quick closure to prevent backflow
- NACE MR01-72 (2002)
- Optional external lockable lever arm
- Pressure classes: 150, 300, 600, 900