The WaStop® Non-Return valve
There are numerous uses for the WaStop® non-return valve, including tidal outfalls, sewer chambers and the protection of domestic properties. A range of installation options allows a unique and very flexible method of preventing back flow. The housing is available in both 304L and 316L stainless steel, as well as PE, and the smaller sizes in PVC. The housing material can be chosen to suit the environment in which the valve is to be installed. Standard sizes range from ø75mm to ø1500mm with larger sizes and specials available on request. The WaStop® is available to withstand pressures of up to 8MwC. The membrane of valve is manufactured using a special blend of polyurethane. The membrane allows water to pass in the desired direction, however when back flow occurs the membrane fills, sealing the membrane against the inside of the stainless steel tube.
The secret to WaStop®'s effectiveness is its specialised Memory Membrane, inserted inside either stainless steel or PVC pipes depending on the application. The Memory Membrane is constructed of a specially formulated blend of polyurethane which gives it exceptional shape retention and chemical resistance. This ensures WaStop® always opens when needed, but then immediately seals to prevent back flow.
Advantages of WaStop®