Series 39/33 Flanged Tideflex Inline Duckbill Check Valve

The Tideflex Technologies Series 39 Slurry Duckbill Check Valve is designed to handle abrasive slurries, sewage, sludge and other difficult services.   At the heart of the Series 39 Duckbill Check Valve is a fabric-reinforced elastomer check sleeve that provides thru-flow at minimum pressure drop across the valve at all times. Forward pressure opens the valve automatically; reverse pressure seals the valve. The check sleeve even seals around entrapped solids.

  • Features an all-elastomer, maintenance-free design—no hinges or seals to bind.
  • Resists abrasion and provides backflow prevention.
  • Can be mounted in any orientation.
  • Closes on entrapped solids.

Materials of Construction

  • Cast iron ASTM A126 body.
  • Check sleeves available in pure gum rubber, neoprene, Hypalon®, buna-N, Viton® and EPDM.
  • ANSI Class 125/150, DIN PN6, PN10, PN16.
  • Special coatings available