Specifications
-
Size Range:
4" - 24" -
Seating Head:
Up to 25 feet -
Seat Angle:
7.5 degrees -
Frame & Cover Materials:
Cast Iron ASTM A-126 Class B -
Mounting:
Flange Mount -
Seat Materials:
Neoprene ASTM D-2000 -
Flange Drilling:
ANSI/AWWA C110, C111 (125-lb standard) -
Hinge Bushings:
Not applicable -
Assembly Hardware:
Stainless Steel ASTM F-593 & F-594, Type 304 or Type 316 -
Hinge Pin & Hinge Link:
Stainless Steel ASTM A-276, Type 304 Standard or Type 316
Features & Benefits
1. Strong, Reliable Frame & Cover
Rugged cast ioron frame and cover provide excellent stability, strength, and durability, making it ideal for low to moderate head applications. The cover is also engineered for smooth, low-friction operation, allowing the flap to open easily under light upstream pressure while providing a tight closure during reverse flow.
2. Hinge Assembly Specifically Designed for Pump Discharge Applications
Heavy-duty hinge assembly – with stainless-steel hinge pin and link system – ensures smooth, reliable flap movement. The hinge design is made to handle the harsh effects of volatile pipeline pressures and water hammer, helping ensure long service life with minimal maintenance.
3. Tight Sealing for Reliable Backflow Protection
Resilient neoprene seat conforms tightly to the frame to provide consistent, dependable, long-term sealing performance. It reduces leakage, absorbs closing impact, and minimizes maintenance needs, for dependable backflow protection in typical drainage, outfall, and pump-discharge environments.
4. Optimized 7.5° Seat Angle
Creates a natural closing force that uses gravity and flow dynamics to guide the cover into a secure, leak-resistant seal. This subtle angle helps the gate close quickly and consistently, even with fluctuating water levels or light debris in the flow.
