1ST CHECK ASSEMBLY, 6X - 8" (DC)
The 6" - 8" First Check Valve Assembly can be used on 6" Deringer 20X & 30X, 8" Deringer 20 & 30, 6" Magnum 20X, and 8" Magnum 20. The 6" - 8" First Check Valve Assembly comes pre-assembled from the factory ready for installation.The 6" - 8" First Check Valve Assembly includes:
- First Check Valve Assembly
- Cover Seal O-Ring
- Retainer Bolt O-Rings
Note: This check valve assembly is for the 6" - 8" Deringer 20(X)/30(X) and Magnum 20(X) modles only. The first and second check valves are not interchangeable.
Dual-Action™ Check Modules
The Patented Dual-Action Check™ (US8875733) is the core technology behind the superior performance of Deringer Backflow Prevention Product Line. The Dual-Action Check™ combines all of the best features of industry standard “poppet” checks and “swing” checks into a single high performance check module.
- Light weight engineered polymer components
- Modular for easy removal of complete check from body.
- Easily disconnect spring tension for safe check servicing.
- Replaceable Silicone Rubber Elastomer Disk.
- Excellent resistance to fouling
- Initial 25% of check stroke is that of a poppet check
- Consistent static sealing
- Excellent resistant to fouling
- Reliable check closure
- Stable flow characteristics at lower flow rates
- Final 75% of check stroke is that of a swing check
- Minimal friction loss at high flow rates
- More linear flow path water through valve