Dual Flap Check Valves operate with minimum flow restriction. These valves are typically installed on the discharge side of the pump, equipment, and piping system. When there is flow in the pipeline, a spring-loaded half-disc opens to shut down against any backflow. VAHN-TECH silent check valves are used in the following applications: General Water Supply, Fire Fighting, HVAC, District Cooling & Sewage System.
DESIGN STANDARD | AWWA C518 / API 6D |
SIZE RANGE | 2" - 24" |
PRESSURE RATING | Class 125 - 250 |
WORKING TEMPERATURE | -10˚C ~ +120˚C |
END CONNECTION | Wafer Type Lug Type (Optional) |
FACE to FACE | AWWA C518 / API 6D |
TEST & INSPECTION | AWWA C518 / API 6D |
MATERIALS | |
Body | Ductile Iron / Al-Bronze / Stainless Steel |
Disc | Stainless Steel / Al-Bronze |
Seat | Rubber (NBR / EPDM) |
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