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    DN 300 - DN 800 (3" - 32")
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    Solid design, superior flow characteristics

High pressure knife gate valves HP, HPT & HX

Stafsjö’s high pressure knife gate valves HP, HPT and HX are all strenthened to withstand high bi-directional pressures. They are equipped with through-going "O" port gates and this secure a really safe and reliable shut-off of static and highly concentrated media. This shut-off performance, along with its excellent flow characteristics, makes them suitable for really demanding operating conditions with media as pulp (pulp concentration < 18%), liqour and highly concentrated slurry.

The valves are three out of five valves in Stafsjö's product range with through-going gates. The HG represent the standard version while the HL is a slim line version of HG available in larger sizes and the HP is a high pressure version of HG. HPT is a high pressure version entirely made in Titanium and finally the HX is an extreme high pressure version for pressure rating PN20.

The valves are all modular designed and they can easily be customized with gate, seats and box packings according to media and requirements, as well for actuators and accessories.

The HP valve is available DN 300 up to DN 800 (3" to 32"). The HPT from DN 200 up to DN 600 (8" to 24") and finally the HX from DN 200 up to DN 500 (8" to 20"). Other sizes on request. Further information is available in the product data sheets.


Reliable shut-off and bi-directional sealing

The retainer ring system on both sides of the gate makes it independent of flow direction. The through-going gate assures a reliable shut-off of highly concentrated and static media.

A bore with excellent flow characteristics

In open position, the bore has almost no cavity at all, making the flow characteristics really excellent. In this position the PTFE seats are protected by the retainer rings and the gate. The seat and retainer rings can also be supplied in Polyurethane for abrasive duties such as slurry and reject.

Solid design to preserve a first rate sealing

The gate is supported all the way from opened to closed position which, together with a proper dimensioned top works, makes the shut-off reliable and repeatable.

Contact us if you have any questions