DSS Valves offer zero leakage, bi-directional isolation that reliably meets or exceeds API, ASME and MSS specifications and can isolate from full vacuum to ASME Class 1500/PN 250 pressures (3750 psig/250 barg).
NOVA has supplied over 10,000 GSGs in leaching circuits around the world on six continents, including most HPAL and POx facilities. DSS manufactures a full range of isolation valves and a unique slurry throttling control valve.
The DSS Guided Shear Gate Design (GSG) consists of two key elements: a shearing tip and internal gate guides.
From open to close the gate is guided the entire way, removing any option to deflect when solids are encountered. When the material is struck by the shearing tip, it is fractured and angled away, enabling zero leakage where the gate meets the primary seal.
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