Navigate to:



World leader in Knife Gate Valves, highest Quality, made in Sweden.


Stafsjo Series - MV Knife Gate Valve


Stafsjö’s knife gate valve MV is used within many different fields of applications. The valve has a gate with a bevel edge that effectively cuts through different media. In closed position the gate is pushed onto the seat which gives a tight and reliable sealing. This special shut-off technique makes the MV valve suitable for both fluids and dry media such as pulp, sludge, biomass, powder and different kinds of waste.

MV is modular designed and can easily be customized to specific process conditions. As standard it is supplied with a valve body in either stainless steel or coated nodular iron, but it can also be supplied in a range of high alloy materials such as Duplex, Hastelloy, SMO and Titanium.

The process adaptation becomes an easy task with Stafsjö’s retainer ring system, since it offers several seat materials and any change of seat can easily be performed both smooth and cost-efficient. The valve is equipped with a gate in stainless steel, with different alloys as options. Just like other Stafsjö valves the MV is as standard equipped with Stafsjö’s box packing TwinPack™, to se-¡cure that no media reaches surrounding environment. The gland box can also be supplied with a box bottom scraper or with double gland for the most demanding applications.

The top work consists of aluminium beams and stainless steel tie rods, which gives good corrosion resistance and a stable operation. There are several actuator types and accessories to choose from in Stafsjö’s standard collection all easily exchangeable between each other.

The MV valve is designed, manufactured, inspected and tested according to the European Pressure Equipment Directive (PED 97/ 23/EC) category I and II module A1. The valve is CE marked when it is applicable.



Due to the vast number of options with the Stafsjo knife gate valves, we ask that you contact our sales team to discuss your requirement or email your enquiry to Note that Stafjso knife gate valves, with the exception of WB11's. Our sales team will be more than happy to send over any technical literature you require. 


      Note that we are making some changes to our website, our website will remain live whilst the changes are implemented.