Wafer Check Valves
Asahi/America, Inc., a leader in thermoplastic fluid flow technologies, offers wafer check valves for installation on the discharge side of pumps in applications such as aquariums, water attractions, water treatment and munici-palities to prevent back-flow flooding that could seriously damage pump systems.

Asahi’s wafer check valve’s body, disc and stopper assembly are machined from solid PVC plate stock, which conforms to ASTM D1784 Cell Classification 12454A.

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 centers on the mating flanges, once the stud pack is installed. The valve outside diameter can be machined to accommodate ANSI/DIN/JIS wafer style bolt patterns. The unique design of the disc and stopper permits the disc to fully open when upstream flow is present, without interfering with schedule piping and mating flanges.

In vertical applications, minimal back pressure provides a positive shut-off tight seal. In horizontal applications, an ETFE-coated stainless steel spring pulls the disc back to the closed position, with minimal back pressure required to fully shut off. A high Cv value ensures that user flow rates will be achieved.

They are 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 150 psi; 10" and 12" at 90 psi and up to 120°F. Optional seals in FKM and an ETFEcoated stainless-steel spring round out the offering. Wafer Check Valves

For more information, contact Lynsey Hurley, Asahi/ America, 655 Andover Street, Lawrence, MA 01843, 800- 343-3618/781-388-4530, E-mail: lhurley@asahi-america.com, Web: asahi-america.com.