MwStop® check valve
High water levels, floods, pumping stations, flooding, pest control, cellar flooding, odour control
MwStop® can be installed in virtually any pipe, even retrospectively, in just a few minutes and provides immediate effective protection against flooding, foreign bodies and annoying odours. The wide MwStop® range ensures that the right MwStop® model is available for every application, whether it is for backwater protection of the sewer system, for use in rainwater pipes or for preventing odour formation in mixed sewers.
POSITION 1 – SHUT DOWN PHASE – the elastic membrane of the MwStop® check valve seals the pipe off tightly until the outgoing flow reaches the trigger pressure.
POSITION 2 – FLUSHING PHASE – the outgoing flow lifts the elastic membrane up and the flush of the water cleans the pipe and removes possible deposits.
POSITION 3 – BACKLOG PHASE – water who pushes the membrane outwards against the wall of the pipe sealing it off effectively against the intrusion of the incoming water. The backlog height varies according to the MwStop® check valve model (maximum 8.000 mm).
MwStop® MODELS AND SIZES
MwStop® check valve
STANDARD MIN. 2% SLOPE
SOFT MIN.1% SLOPE
checked back pressure:
- standard … max. 5m water colomn
- soft … max. 3m water colomn
stainless steel EN 1.4404/AISI 316 (optional PVC/PE)
- NBR (DN100 – DN300)
- EPDM (DN300 – DN1800)
The scope of delivery includes seals and mounting straps up to DN900
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FOR ALL COMMON PIPE INSIDE DIAMETER
MwStop® check valves are available up to 1800. Therefore practically for all pipe dimensions and pipe
materials. Special sizes are available on request.
The standard casing of the MwStop® consists of stainless steel 1.4404.
For sizes up to DN200 and mounting as part of a pipe, PVC/PE can be used as an alternatively offered.
The MwStop® membrane is manufactured up to DN300 in NBR.
Larger diameters are made from EPDM
MwStop® STANDARD FOR GRADIENTS ≥ 2%
To ensure the full functionality of the MwStop® a minimum gradient of 2% is required in the Standard version. Under this precondition the EPDM membrane of the MwStop® opens up at a certain water pressure (water flow) and closes if this pressure falls below the normal level. The MwStop® remains closed until the pressure of the backlog water reaches the trigger point. At the trigger point it opens up all of a sudden creating the controlled flushing process.
MwStop® SOFT FOR LOW GRADIENT
For installation in pipes with a gradient of less then 2% (minimum 1% is required) the membrane of the MwStop® consists of a more flexible material. This ensures that even in these situations the flushing process removes the waste water inclusive eventual deposits.
MwStop® valves can be installed in various ways in any position from horizontal to vertical , full functionality is given.