Forede DN250 Flange End Pn16 Fire Swing Check Valve

H44T single-disc offers lower flow resistance, reliable sealing with NBR coating, suits larger pipe sizes (up to 12'), and is more economical for large-diameter applications. Double-disc valves have slightly higher resistance and are often used in smaller pipes.

The valve is designed for positive pressure. In vacuum systems, the disc may not seal properly. Use a vacuum-rated check valve with a spring-loaded disc instead, or modify the H44T by adding a vacuum relief mechanism.

With quarterly inspections (cleaning disc, checking coating, tightening bolts), the valve can last 8-12 years. Neglecting maintenance reduces lifespan to 3-5 years due to debris buildup and mechanical stress.

No, the H44T is a passive check valve and cannot be actively controlled. For ESD applications, use an actuated check valve (pneumatic or electric). The H44T closure speed depends on flow reversal, typically 0.5-2 seconds.

The swing disc helps mitigate water hammer by closing gradually, but severe spikes may still occur. Enhance protection by installing a water hammer arrester upstream and ensuring correct valve sizing to avoid undersizing.