Home Dewatering, Product, Valve Isogate® WS knife gate valves

Isogate® WS knife gate valves


Design standards N/A
Design ratings N/A 
Size range/-dimensions50 to 600mm (2″ to 24″)
Pressure class/-power50-400mm 2″ – 16″ 1035kPa (150psi);450-600mm (18″ – 24″) 700kPa (100psi)
Temperature range0-120°C

Key features/benefits

  • Unibody design and rugged heavy duty construction ensures long valve life and greater reliability 
  • Flexible two-piece sleeve system allows valve to cycle in heavy slurries without sticking
  • Sleeves are easily replaced without disassembling the valve
  • Replaceable upper seal design is not only packingless, which eliminates the need for periodic adjustment, it is also a self-lubricating system and is rechargeable without valve disassembly (sizes 2” through 16”)
  • Full port design reduces pressure drop and turbulence
  • Open bottom allows for the purging of large solids and solids in high concentration
  • Bi-directional shutoff
  • Wafer style saves pipeline space
  • Sleeves are available in a variety of materials to handle abrasion and chemical applications
  • Flushing plate option allows for periodic cleaning of the lower discharge vent and allows flushing as needed
  • Enclosed bronze stem bushing with a protected grease chamber means less operating force after long dormant periods
  • Upper stem protector and optional protective lower stem cover prevent external contamination


  • On/Off Isolation of low pressure slurries to 10 bar
  • Cyclone Feed
  • Thickener Underflow
  • Flotation
  • Tailings
  • FGD


  • Slurry transportation
  • Tailings Management
  • Wet sand pumping


Body: Cast ductile iron as standard

Gate: 316 Stainless steel as standard. Other materials including Hastelloy, C-276 alloy and alloy 2205 are also available

Sleeves: Natural rubber as standard. EPDM and other materials area also available

Yoke: Carbon steel