Vernay Umbrella Check Valves are designed to open and close at a range of predetermined pressures and can be developed for high or low opening pressures. Pressure drop across the valve is controlled by the modulus of material, effective flow area, the amount of pre-load on the sealing edge, and the thickness of the umbrella skirt section. Vernay’s lightweight Umbrella check valves allow flow in one direction and check flow in the opposite direction. They are self-actuating, easy to assemble, and unaffected by orientation, so performance is the same even if the valve is mounted upside down.
- Normally closed one-way check valve
- Open in pre-determined pressure range
- Installed into flat seat with flow holes underneath