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.

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Function

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).

Measurements & technical drawings

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

material:

stainless steel EN 1.4404/AISI 316 (optional PVC/PE)

membrane:

NBR (DN100 – DN300)
EPDM (DN300 – DN1800)

mounting:

The scope of delivery includes seals and mounting straps up to DN900

[standard] [soft][standard] [soft]Artikelnummer	DN [mm]	Außendurchmesser [mm]	Zeichnungen	Techn. Spezifikation
MW97	100	97	[standard] [short]	[link]
MW110	110	100	[standard] [short]	[link]
MW125	125	115	[standard] [short]	[link]
MW150	150	144,5	[standard] [soft]	[link]
MW200	200	193	[standard] [short]	[link]
MW225	225	215	[standard] [short]	[link]
MW250	250	240	[standard] [short]	[link]
MW300	300	283	[standard] [short]	[link]
MW350	350	340	[standard] [short]	[link]
MW400	400	390	[standard] [short]	[link]
MW450	450	443	[standard] [short]	[link]
MW500	500	490	[standard] [short]	[link]
MW600	600	587	[standard] [short]	[link]
MW700	700	690	[standard] [soft]	[link]
MW800	800	790	[standard] [short]	[link]

Further informations

MwStop® VERSIONS

MwStop® SIZES

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.

MwStop® MATERIALS

CASING

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.

MEMBRANE

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.