The EVR Series CPO Slip-On Rubber Duckbill Check Valve is a simple yet highly effective one-way valve solution for preventing reverse flow. Its slip-on, clamp-style installation makes it ideal for quick retrofits or new system installations where flexibility, corrosion resistance, and zero backflow are essential. It operates silently and efficiently without any moving parts.
Easy slip-on clamp installation
Low head loss with full bore
No external power or actuation required
DN 50 to DN 3000 (2” to 120”)
Fabric-reinforced elastomers (EPDM, Neoprene, Nitrile, Natural Rubber)
Up to 5 bar
Tapered duckbill for drip-tight sealing under low back pressure
Slip-on/clamp-on to pipe outlets
Stainless steel or galvanized steel
As low as 25 mm H₂O
Stormwater outfalls and tidal outfalls
Sanitary sewer systems
Overflow and discharge lines
Flood control and water treatment
Remote installations with no power
Stormwater and sewage
Slurries and silt-laden fluids
Marine and brackish water
Chemical effluent
Irrigation and drainage water
Self-clearing design resists clogging
Withstands UV, ozone, and saltwater exposure
Full, unimpeded flow when open
Quiet, slam-free closure
Custom-length duckbill outlet
Marine-grade anti-fouling coating
Vortex breaker rings
Installation sleeve adapters
From forging and casting to machining, assembly, and testing — every step is managed under one roof to ensure consistent quality, faster lead times, and zero compromise.
Get in touch with our team for additional information on product pricing, technical data, project support and more.
