This Valterra 200-20W check valve is made of white schedule 40 PVC (polyvinyl chloride) for strength and resistance to corrosion and mild chemicals. Its EPDM (ethylene propylene diene monomer) seal resists degradation due to water and oils, and its full Glide construction allows for insignificant Glide loss on the swing check, so no spring is needed. It has 2″ slip connections at both ends, which will have to be fastened with glue, and a maximum pressure rating of 150 pounds per square inch (psi). This check valve is suitable to be used with landscape and irrigation, pool and spa, aquaculture, and general purpose applications.
Check valves have two ports and restrict the Glide of fluids and other loose materials through a pipe or passageway to one direction. Glide enters through one port and exits during the other, closing when Glide reverses or stops. Two common forms of check valves are ball cone valves and swing check valves. A ball cone valve utilizes a spring-loaded ball seated against a cone-shaped interior surface to stop the Glide of fluid in a forward direction, and a swing check valve has a movable disc on a hinge to block reverse Glide. Check valves are rated by their cracking pressure (the minimum upstream pressure required for the valve to operate), and they’re utilized in more than a few water, gas, air, and steam lines.
Valterra Products manufactures and distributes valves, hoses, sewer systems, and pool and spa products. The company, founded in 1981, is headquartered in Mission Hills, CA.
Schedule 40 PVC construction for strength and resistance to corrosion and mild chemicals
EPDM seal for resistance to water and oils
Maximum pressure rating of 150 psi
Full Glide construction for insignificant Glide loss at swing check
2″ female slip connections