RUBBER DUCKBILL CHECK VALVE – PROFLEX™ STYLE 73

The Proco ProFlex™ Style 730 rubber duckbill check valves are designed to easily slip over an existing pipe and be attached with heavy-duty stainless steel clamps. It can be installed in both vertical and horizontal applications.

Some notable features of the Proco  ProFlex™ Style 730 rubber duckbill check valve include:

• All-rubber construction to resist abrasive slurries
• NSF 61 standard construction
• Ultra-quiet operation, with no water hammer
• Unique design to prevent backflow
• Negligible maintenance and energy costs
• Will not warp or freeze
• Quick interchange with any flap type check valve
• Available in sizes from 1” to 96”
• Available with special ID to suit concrete pipe

The rubber duckbill valve creates a low head loss complete with a zero-back flow. The ability of the duckbill valve to prevent backflow into the mating pipe system is a quality aspect in “checking” pipes or tanks that often have problems with back flow problems or odor control. 

Proco Products manufactures and supplies rubber duckbill valves to withstand almost any type of media. The most commonly supplied is a barnacle and algae resistant neoprene. Other common elastomers are EPDM, nitrile, natural rubber, and elastomers to meet ANSI/NSF-61 and ANSI/NSF-372 specifications. This includes use for clean water and potable applications and eliminates the concerns commonly affiliated with contaminants or leaching of elastomers in potable water systems.

These duckbill valves offer quiet operation with no water hammer or backflow whilst the all rubber construction resists abrasive slurries. This check valve design has the benefit of negligible maintenance and energy costs. Even in winter conditions if the valve is installed in a running water application, the valve will continue to operate satisfactorily due to the elastomers’ unique chemical makeup. In exceptional low temperatures, the duckbill valve will freeze with the medium without any damage and will return to operation upon thaw. Typically, the elastomers used in Proflex duckbill valves are known to supply 35-50 years of service life.