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SLH & SLX Series

About SLH & SLX Series

Stafsjö’s SLH & SLX series are push through slurry knife gate valves designed for high pressure and demanding mineral processing applications. The SLH is designed to operate and provide a bi-directional tight seal in applications up to 20 bar/290 psi while the SLX has the features for applications up to 50 bar/725 psi.

Technical Specifications

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Description

Stafsjö’s SLH & SLX series are push through slurry knife gate valves designed for high pressure and demanding mineral processing applications.

The SLH is designed to operate and provide a bi-directional tight seal in applications up to 20 bar/290 psi while the SLX has the features for applications up to 50 bar/725 psi.

The SLH and SLX are modular designed and can easily be customized with actuators and related automation accessories to different process standards. They are also available with mechanical lock out. As standard, the SLH and SLX are supplied with a very robust and precision machined nodular iron valve body. The gate is supplied in strong duplex for the SLH and hard 17-4ph stainless steel for the SLX. Independent of material, the gates are specially grinded and hard anti-stick coated with the purpose of reducing the friction when they cycle through the valve’s rubber seats.

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

Available in sizes ranging from DN 80 – DN 450 (3” – 18”).

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.

In addition to these slurry valves, Stafsjö also offers the compact SLV series up to DN 900/36″ and another wide body flanged slurry valve, the SLF. Those series are designed for application up to 10 bar.

Features
  • • Bi-directional push-through shut-off
    • A precise gate alignment extends the service life
    • Reinforcements rings ensure stability and performance
    • Expansion areas reduce stress and actuation force
    • Wafer or semi lugged
  • Body materials:
    • Nodular iron
  • Valve seat materials:
    • EPDM
    • Natural rubber
Downloads
SLV - SLF - SLX Knife Gate Valve
Overview