This Edwards Stokes exhaust clapper valve is a heavy duty, poppet type and is corrosion resistant. The kit includes one clapper valve and a valve plate gasket. Two kits are required for the 212H-11 pump, and four for the larger 412H-11 pump.

The Stokes Microvac rotary piston pump sets the standard for performance and reliability as the industries most efficient, space-saving design. The Stokes Microvac rotary piston pump has been improved, upgraded, and fine-tuned to deliver even better dependability and productivity combined with minimal maintenance and process downtime.