Check Your Check Valves

May 15, 2020
Style 711/731 ProFlexTM Check Valves

Check valves are used in all stormwater and wastewater systems. They allow the forward flow of fluids before closing to prevent backflow conditions. These valves come in a variety of diameters and designs including swing, ball, diaphragm and duckbill styles. They are simply designed, passive devices that rely on flow velocity and pressure to open and close without any manual or automated assistance.

A duckbill check valve is a flexible sleeve shaped like a duck’s beak. It allows forward flow of water with positive differential pressure which progressively opens the valve as flow increases. Duckbill check valves consistently provide the tightest seal for preventing backflow. The flexible elastomer material can compress tightly around trapped solids if necessary.

The Proco Style 711/731 ProFlex™ check valves are engineered for installation on pre-existing pipe lines such as manholes, outfalls and vaults where the outfall invert of the pipe is close to the floor of the manhole or outfall. When a new installation is being designed, the 711/731 valves can be engineered into the pipe layout with little concern for outfall clearance due to its “low slope” design.

The new Style 711/731 check valves allow the valves to be installed without any costly and labor-intensive changes to the existing structure. The 711/731 is engineered to crack open at 1-2” of head pressure and with its unique engineered sloping bottom, the valve ensures zero potential for standing water. With its all elastomer design, the valve can be installed without concern for the future seizing or rusting which can cause premature failure and maintenance issues. WW

Proco is exhibiting at ACE20, booth 5118. Learn more at www.procoproducts.com.

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