Slip-on Duck Bill Check Valves

Style 4100

Features:

  • Reliable and cost-effective alternative to flap-gate and other conventional check valves
  • Eliminates backflow and seals around entrapped solids
  • Rugged all-elastomer construction
  • Maintenance-free operation with no mechanical components that can corrode or seize
  • Lower head loss than conventional check valves
  • Will open with as little as 1" W.C.
  • Quiet operation (non-slamming)
  • Non-plugging
  • Excellent corrosion and abrasion resistance
  • Versatile construction for a wide range of applications
  • Manufactured with an integral reinforced cuff end provided with heavy ­duty clamps for easy attachment directly over the pipe or thimble plate
  • Wide variety of sleeve elastomers available for different abrasion and corrosion service conditions
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Typical Applications:

Storm Water Outfall/Overflow: The Flex-Valve® Style 4100 Duck-Bill check valves provide quiet, maintenance-free operation with an added benefit of low opening pressure. The low opening pressure eliminates standing water – a major health concern.

Submerged Outfall Diffuser: The Flex-Valve® Style 4100 Duck-Bill check valves will eliminate marine fouling and backflow intrusion with an added benefit of higher jet velocities. The high jet velocity is also found at low flow rates, providing a more uniform port discharge distribution. The versatile construction and our creative design team can adapt the Flex-Valve® Style 4100 Duck-Bill check valves to additional applications including, but not limited to: water mixing systems, overflow vents, anti-siphon devices, course bubble diffusers, floor drains, sparging devises, or when needed, a devise to increase back pressure in a pipe line.

Notes:

  1. Style 4100 sizes are based on Schedule 40 pipe. Other I.D. dimensions are available.
  2. Dimensions are subject to change due to customized construction. Steel, Concrete, and Ductile Iron Pipe O.D.s vary.
  3. Flex-Valve®, Duck-Bill Check Valve’s dimensions – are based on actual pipe and therefore it is important to verify pipe O.D. for proper sizing.
  4. For full product specifications and installation instructions, see SPEC 4100-1 and ININ 4100-1.
  5. All dimensions expressed in inches. Contact General Rubber for sizes not shown and higher pressure ratings.
  6. Customer to provide head pressure and maximum back pressure when ordering.