Wafer Check Valves sourcingAbout Wafer Check Valves
Slim wafer check valves that clamp between pipe flanges, in single-disc and dual plate designs, DN40 to DN600, in cast iron, carbon steel and stainless with metal or resilient seats.
A wafer check valve is defined by its body style rather than its closure: a slim ring that clamps between two pipe flanges on through-studs, with no flanges of its own. Inside, the closure may be a single spring-assisted disc, a swing flap or a pair of spring-loaded plates, so the wafer family overlaps with disc check and dual plate designs. The attraction is space and cost: face-to-face length is a fraction of a flanged swing check, weight is low, and one body pattern often suits several flange drillings. Wafer checks are used throughout building services, HVAC, water treatment, cooling circuits, pump discharge and general industry wherever a compact non-return function is needed. Indian manufacturers commonly supply cast iron and ductile iron bodies with bronze or stainless internals for water at PN10 and PN16, carbon steel and CF8M stainless bodies to ASME class 150 and 300 for process duty, and all-stainless spring disc versions for utilities and hygienic-adjacent services. Dual plate wafer valves are built to API 594, pressure-temperature ratings follow ASME B16.34, and testing is to API 598. Because the valve is trapped by the joint, it must match the flange standard, rating and gasket arrangement exactly. When enquiring, state line size, flange standard and rating, disc style, body and trim materials, seat type, service medium and temperature, mounting orientation and quantity.
