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Onyx Valve Series WCV
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Onyx Valve Series WCV


The Series WCV Wafer Style Check Valve is a revolutionary new valve design engineered specifically for water applications. This valve operates solely on line pressure and back pressure to open and close, requiring no external energy source. As line pressure builds, the elastomeric flapper disc is pushed away, allowing water to pass through. The memory of the rubber causes the flapper disc to return flat, and back pressure seals the flapper against the plate to prevent backflow. The WCV Check Valve is designed for installation between two mating flanges, making it ideal for strictly fluid applications.

Onyx Valve Company manufactures all valve components in-house using state-of-the-art machining technology. Every component is designed and manufactured to the most precise machine-tool tolerances, ensuring optimal performance and reliability. The Series WCV Check Valve is the perfect solution for water applications requiring a simple, efficient, and reliable valve design.


  • Operates solely on line pressure and back pressure, requiring no external energy source
  • Elastomeric flapper disc with rubber memory ensures proper sealing and prevents backflow
  • Designed for installation between two mating flanges, making it ideal for fluid applications
  • In-house manufacturing using advanced machining technology ensures precise tolerances and high-quality components
  • Simple, efficient, and reliable design specifically engineered for water applications


  • Water treatment facilities
  • Wastewater and sewage systems
  • Stormwater control
  • Irrigation systems
  • Fluid transfer lines


  • Designed for horizontal and vertical pipe installations
  • For horizontal pipe, orient the center rib in a vertical position
  • For vertical pipe, install the WCV Check Valve for 'Flow Up' configuration
  • Refer to the WCV CHECK VALVE I&M Rev-C PDF for detailed installation and maintenance instructions



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