MG SERIES
Knife gate valves with an EN 558/ISO 5752 20 series face to face often quickly reach their pressure limit values of 10 bar – but not our MG series. For the same face to face, it is generally designed for pressures of up to 16 bar. Of course, we retained the many design features that have always set the Wey knife gate valve apart from the competition.
CHARACTERISTICS MG Series
Nominal sizes
Material
Pressure rating
Flange drilling
Face to face dimension
-
Most known pipe-cleaning methods (e.g., pigs, brush cylinders, etc.) can be used with the body bore, resulting in minimal pressure drops.
-
With its optimized gate geometry, accumulated media is pushed out of the gate guide and flushed out into the bore by the increased flow.
-
The gate is mechanically guided over the full stroke.
-
In the closed end position, the gate is also mechanically supported.
-
A unique transverse seal, consisting of a transverse seal profile and packing compound, makes the body bubble-tight towards the atmosphere.
-
The transverse seal can be repacked at any time and under full pressure using the lateral packing screws.
-
A mechanically retained round cord seal creates a bubble-tight shut off on the gate edge.
-
Robust 4-post topwork for maximum load and a wide variety of actuator types.
-
The non-rising stem in the manual actuator saves space and provides good mechanical power transmission.
Application areas
Biogas plants
e.g.
Food waste, Household waste, Wood chips, Manure, Substrates, Other renewable resources
...
Mining
e.g.
Coal dust, Mining slurry, Sinter water, Tailings, , Acids and phosphates
...
Chemical and petrochemical industries
e.g.
Viscous pastes, Chemically contaminated waste water, Bitumen/tar
...
Infrastructure
e.g.
Waste water
...
Coal fired power stations
e.g.
Coal slurry
...
Food and beverage
e.g.
Cereal, vegetable, mash, etc., Cocoa beans
...
Pulp and paper industry
e.g.
Pulp Stock (Low to high density), Liquor (black, white, green)
...
Waste water treatment plants
e.g.
Waste water, Raw water, Sludge, Digested sludge
...
Water treatment
e.g.
Seawater, Saltwater
...
Case Study – Seat water heat pump Esbjerg
Knife gate valves MG made of Super Duplex stainless steel for the inlet and outlet of Denmark's biggest sea water heat pump
PDFMATERIAL OF CONSTRUCTION
| Part | Ductile iron | Stainless steel |
| Body | EN-GJS-400-15 | 1.4408 |
| Gate | 1.4301, 1.4462 | 1.4404*, 1.4462* |
| Seal | NBR | NBR |
| Topwork | Carbon steel | Carbon steel |
| Stem / Piston rod | 1.4104 | 1.4104 |
Other materials upon request
*hard chromed
CORROSION PROTECTION
| Body | 2 Comp. Epoxy-Polyamide Resin Primer, 2 Comp. Polyurethane-Enamel-Top Coat | |
| Topwork | 2 Comp. Epoxy-Polyamide Resin Primer, 2 Comp. Polyurethane-Enamel-Top Coat | |
ACTUATORS
Handwheel
Bevel gear
Pneumatic cylinder
Hydraulic cylinder
Electric actuator
General documents
Data sheets
- MG with handwheel PN 162.5.10
PDF - MG with bevel gear PN 102.5.11
PDF - MG with bevel gear PN 162.5.12
PDF - MG with pneumatic cylinder PN 102.5.30
PDF - MG with pneumatic cylinder PN 162.5.31
PDF - MG with electric actuator PN 102.5.40
PDF - MG with electric actuator PN 162.5.41
PDF - MG with hydraulic cylinder PN 102.5.50
PDF - MG with hydraulic cylinder PN 162.5.51
PDF
CAD files
- MG with handwheel 2D (DXF/DWG)
ZIP - MG with handwheel 3D (STEP)
ZIP - MG with bevel gear 2D (DXF/DWG)
ZIP - MG with bevel gear 3D (STEP)
ZIP - MG with pneumatic cylinder 2D (DXF/DWG)
ZIP - MG with pneumatic cylinder 3D (STEP)
ZIP - MG with electric actuator 2D (DXF/DWG)
ZIP - MG with electric actuator 3D (STEP)
ZIP - MG with hydraulic cylinder 2D (DXF/DWG)
ZIP - MG with hydraulic cylinder 3D (STEP)
ZIP
News & Stories
-
Full free passage
Pipelines leading into open waters always bear the risk of deposits caused by mussels or other organic material. To ensure that regular cleaning by pigging can be carried out without any problems, we manufacture our valves in a full bore version at the customer's request.
-
Compact and heat resistant
For this manually operated knife gate valve MG DN100, special attention was paid to the selection of materials. They must withstand temperatures of up to 240°C during subsequent use in a power plant.
-
Super duplex for extra resistance
Seawater is considered to be one of the most corrosive natural environments on earth. For an offshore application in Denmark we therefore designed a Wey knife gate valve MG DN 1200 whose body and gate are made of super duplex stainless steel. With a PREN value of >42 super duplex makes the valve perfectly resistant against corrosion in its future environment.
-
Shut-off performance in paper production
For a paper manufacturer with multiple plants in Taiwan, China and Vietnam, we manufactured several knife gate valves from the MG series. The valves with nominal sizes of DN 300 - 500 can withstand pressures of up to 16 bar and were equipped with powerful double-acting Cowan pneumatic cylinders. At their destination, numerous Wey knife gate valves are already reliably shutting off various pulp mixtures.
-
For temperatures up to 400°C
These two knife gate valves MG DN 400 recently left our production site for a Brazilian plant working on water treatment and the disposal of industrial effluents.
