Stafsjö’s SLV and SLF series are push-through slurry knife gate valves with superior flow characteristics, offering reliable and bi-directional shut-off performance, particularly in abrasive and demanding mineral processing applications with pressure up to 10 bar.

The SLV series features a fully-lugged design while the SLF series features a flanged design.

The SLV and SLF valves are modularly designed and can easily be customized with actuators and related automation accessories to fit different process conditions. The valves are also available with mechanical lock out. As standard, the SLV is supplied with a robust and precision machined nodular iron valve body and strong duplex stainless steel gate, which is also specially grinded to reduce friction when it cycles through the valve’s rubber seats.

The SLV and SLF automated assemblies come standard with proximity switch sockets to confirm the valve’s opening and closing. The valve design also allows for magnetic limit switches mounting.

Available in sizes ranging from DN 50 – DN 900 (2” – 36”).

A precise alignment to extend service life. A solid top works, a robust gland box system, and precision machined gate support ensure accurate gate alignment throughout the full stroke, thus reducing stress and wear on the seats. The front reinforcement rings ensure the seats’ shape, position, and strength remain during operation while the flange sealing reinforcements secure a tight and exact position of the seats towards the gate and connecting flanges. The seat entrance area is designed to give a smooth gate entry and the expansion areas allow the seat to be axially flexible with minimal actuator force.

Stafsjö also offers two high-pressure versions SLH & SLX series for pressure up to 50 bar.

Valves can be assembled with a manual, pneumatic, or electric actuator.