DUCKBILL CHECK VALVES
The Rubber Duckbill Check Valves are a cost effective way to control back pressures from sewage treatment plants, outfalls and tidal operations. They are a fully passive flow device requiring neither maintenance nor any outside sources of power or manual assistance to operate.
Offered as direct replacements for ineffective and maintenance ridden flap type check valves,
commonly known to seize, rust and bind in unwanted positions. Unlike flap type valves, the rubber duckbill check valves will handle large obstructions without jamming or having swing gates binding open.
Our valves provide backflow protection from:
» Sewage slurries
» Outfalls to ocean fronts from heavy rainfall activity
» Prevention from land erosion due to back flow conditions
» Protection from saltwater to fresh water ponds and catch basins and numerous other water based applications
Style 710: Flanged
Designed to bolt directly to existing flanges or new installations, flanges are drilled to ANSI 125/150# standard. Other drilling standards are also available upon request. The style 710 can be installed in either vertical or horizontal applications.
Style 711/731 Flanged/Slip-on Slope Bottom Check Valves:
Designed for installation on pre-existing or new pipe lines such as manholes, outfalls, vaults, where the outfall invert of the pipe is close to the floor of the manhole or outfall. Can be engineered into the pipe layout with little concern for outfall clearance due to its “low slope” design.
Style 720: Flanged In-line:
Designed to fit directly inside of an existing pipe. Supplied with a flat face rubber flange which allows installation between existing pipe flanges eliminating the requirement for a valve body. Flanges are drilled to ANSI 125/150# standard. Other drilling standards are
also available upon request.
Style 730: Sleeve Type:
Designed to easily slip over an existing pipe, and is affixed with heavy-duty stainless steel clamps. Can be installed in either a vertical or horizontal application.
Style 740: Slip In-Inline:
Designed to slip directly inside of an existing
pipe. Supplied with a stainless steel expandable clamp to secure it in place.
Benefits of the PROCO Series 700 ProFlex™ Rubber Duckbill Check Valves:
» All rubber construction resists abrasive slurries
» Barnacle resistant Neoprene is standard construction, with NSF61 valves also available.
» Very quiet operation with no water hammer
» Its unique design prevents backflow
» Negligible maintenance and energy costs
» Will not warp or freeze
» Quick interchange with any flap type check valve
» Available in sizes 1”– 96”
» Available with special I.D to suit concrete pipe