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    DN 80 - DN 1200 (3” - 48”)
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    Superior flow characteristics
    and trusted shut-off on static media columns

Knife gate valves HL and HG

Stafsjö’s knife gate valves HL and HG have excellent flow characteristics and gives a bi-directional tight sealing. 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 flow characteristics, makes them suitable for severe operating conditions with media as pulp (pulp concentration <18%), liquor, reject, powder, ash and highly concentrated slurry.

The HL and HG are two 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.

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 HG valve is avilable from DN 80 - DN 1200 (3” to 48”) and the HL from DN 400 up to DN 800 (16" to 32". 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 valve’s 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 seats and retainer rings can also be supplied in Polyurethane for abrasive duties such as slurry and reject.

Solid design to preserve a first class sealing

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

Contact us if you have any questions