HL & HG KGV - Stafsjo Knife Gate Valves

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

Stafsjö’s knife gate valve HL has a full bore with excellent flow characteristics. The valve is equipped with a through-going gate for secure bi-directional shut-off of concentrated and static media. This shut-off performance, along with its flow characteristics, makes it suitable for severe operating conditions with media such as pulp (pulp concentration > 5%), liquor, reject, powder and ash. The HL is supplied as standard with a valve body in stainless steel, which has integrated purge ports and guiding strips. 

To be able to cope with bi-directional pressures, the HL has a retainer ring system on both body halves. The valve is equipped with a gate in stainless steel, but duplex material and hard chromed surface are options to increase the wear resistance.

The gland boxes are equipped with Stafsjö’s box packing TwinPack™, to secure that no media reaches the surrounding environment. The valve has a rigid two piece precision machined valve body with a high strength top works consisting of aluminium beams and stainless steel tie rods for corrosion resistance and a stable operation. 

The valve is of a modular design and can easily be customised to specific processes requirements and there are several actuator types and accessories to choose from our standard collection. 

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

The HL valve is one of five valves in Stafsjö’s product range with through-going gates. 

• The HG represent the standard.
• The HP is a high-pressure version of the HG
• The HPT is a high-pressure version that is entirely constructed out of Titanium.
• The HX is an extremely high-pressure version.