Proco Products, Inc.

- Model Style 730 - Sleeved Rubber Duckbill Check Valve

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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 PROCO Series 700 “ProFlex” Rubber Check Valve is a cost effective way to control back pressures from sewage treaent 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.

The PROCO Series 700 “ProFlex” Check valves are 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 “ProFlex” rubber check valve will handle large obstructions without jamming or having swing gates binding open. Specify the PROCO Series 700 “ProFlex” rubber check valves to provide backflow protection from (1) Sewage slurries, (2) Outfalls to ocean fronts from heavy rainfall activity, (3) Prevention from land erosion due to back flow conditions, (4) Protection from saltwater to fresh water ponds and catch basins and numerous other water based applications. Our history in the manufacture of rubber piping products dates back to 1930. When an engineered solution is needed to solve a piping or backflow problem, call PROCO.

The PROCO Series 700 “ProFlexTM” Rubber Check valves are available in a Flanged (Style 710 or 720), Sleeved (Style 730 or 740), or Jacketed (Style 750). Inline orifice (style 770/780)

  • Style 710: Flanged: Designed to bolt directly to existing flanges or new installations, flanges are drilled 150# standard. Other drilling standards are also available upon request. The style 710 can be installed in either vertical or horizontal application.
  • Style 720: Flanged Inline: 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. Other drilling standards are also available upon request.
  • Style 730: Sleeve Type: Designed to easily slip over an existing pipe, is affixed to a pipe with heavy-duty Stainless Steel clamps. Can be installed in either 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.
  • Style 750: Jacketed: Designed with a full metal enclosure which allows easy installation in existing piping systems. Utilizes the Style 710 as the check valve.
  • Style 770/780: Designed with a metal or plastic orifice plate and a rubber disk , this valve is an ideal valve to provide high back pressure capability on clean water applications
  • Style 790: Low Headloss In-Line: Designed as an all one piece constructed valve, the Style 790 is one of lowest headloss valves on the market. A passive flow device insuring no delamination.

ELASTOMERS: All of the PROCO Series 700 “ProFlex” Rubber Check Valves are available in a various selection of elastomers including NSF/ANSI 61 certified material and back pressure capabilities to suit most applications.

The PROCO Series 700 “ProFlex” Rubber Check Valves will not freeze or deform and functions solely on the inlet and back pressure which will be present in each application.

Each valve is carefully constructed using the finest of engineered materials and some of the most experienced rubber technicians in the industry. All check valves are engineered in precise detail to ensure proper operation and will provide years of unhindered operation and trouble free service.

The ProFlex 730 Slip-on Rubber Duckbill Check Valve is designed to slip directly over an existing pipe, and is supplied with heavy duty stainless steel clamp(s) to secure it in place. Sizes 1” – 10” utilize T-Bolt clamps and sizes above 10” utilize Bolt-On Clamps for securing.

The ProFlex 730 Slip-on Rubber Duckbill Check Valve can be designed and manufactured to slip over any outside diameter pipe including oval and rectangular configurations.

For higher pressure/vacuum requirements, the ProFlex 730 Slip-on Rubber Duckbill Check Valve can also be manufactured using a unique Internal Vacuum Supports (IVS) design which is homogeneous to the inner reinforced layers of the valve allowing a full flow with no obstructions and yet providing excellent anti-inversion features.

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