Wafer Check Valve – Overview The type 369 Wafer Check Valve is designed especially for large installations. It requires little maintenance and is extremely compact. The design is optimised for installations between ISO/DIN as well as ANSI/BS connections. The flap traps can be installed either horizontally or vertically. When the medium flows, it opens up the plate of the flap trap, allowing the medium to flow through. The flap closes again if the medium pressure falls below a certain threshold. The flap traps of Type 369 are intended to prevent media from flowing back within the allowable pressure and temperature range. The flap traps are available with or without a return spring made of V4A or Hastelloy. This is suitable for use in water treatment and the chemical process industry. Wafer Check Valve – Features Self-closing check valve Horizontal or vertical installation (water column/gravity / optional spring) Installation between both ISO/DIN and ANSI/BS connecting elements Simple installation Highly resistant materials Robust design Virtually maintenance free Parts that come into contact with media are highly resistant plastics and elastomers Optimised flange gasket made of EPDM/FKM installed in the valve housing. Suited for fluted connecting elements Disc seals available in EPDM/FKM and are installed in plates For pulsating flow, flap traps with reset spring (stainless steel V4A/Hastelloy C) available. Reduces noise development
