Asahi/America launched a new 3” PVC wafer check valve. Wafer check valves are installed on the discharge side of pumps in applications such as aquariums, water attractions, water treatment and municipalities to prevent back-flow flooding that could damage pump systems.
Asahi’s wafer check valve’s body, disc and stopper assembly are machined from solid PVC plate stock that conforms to ASTM D1784 Cell Classification 12454A. This material was selected based on its excellent chemical resistance and mechanical properties. The wafer check valves are machined, assembled and tested at Asahi/America’s corporate headquarters in Lawrence, Massachusetts.
The wafer check valve conforms to ISO 5752 face-to-face dimensions and is easily installed by slip-fitting the valve between two mating flanges. The valve body automatically centres on the mating flanges once the stud pack is installed. A directional flow arrow on the valve body indicates the upstream and downstream sides of the valve. The lack of a bolt pattern allows one valve style to accommodate ANSI/DIN/JIS mating flange dimensions.
Asahi’s wafer check valve is available in PVC, 3” through 12”, with EPDM seals and no spring, standard. All 3”–8” wafer check valves operate at a maximum pressure of 150psi; 10” and 12” at 90psi and up to 120°F. Optional seals in FKM and an ETFE-coated stainless steel spring are also available.