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Clarkson Figure OS1700 Knife Gate Valve
Clarkson Figure OS1700 Knife Gate Valve
Bi-directional zero leakage ASME Class 150 rated knife gate valve.
Designed for the rigors of high pressure slurry and oil sands applications
Clarkson Figure OS1700 Knife Gate Valve


316L Stainless Steel, Carbon Steel
Operating Temperature
Less Than 400 F (204 C)
Pressure Class
Process Connection Type
Seat/Seal Type
Shutoff Class
Zero Leakage
ASME B16.34
Valve Size Standard
Valve Type
Gate Valve
Valve Type
Knife Gate Valve, Slurry Knife Gate Valve


  • Full round port and seat design offers low pressure drop across valve and longer service life in abrasive applications.
  • True bi-directional flow and Zero leakage* shut-off, can be installed in either direction.
  • Compliance to the face-to-face dimensions of MSS-SP135 (short).
  • Suitable for dead end service up to full rated pressure.
  • Designed as a repairable asset for a lower cost of ownership.
  • 17-4 ph stainless steel hardened gate provides improved abrasion resistance against the rigors of abrasive applications.
  • Heavy cross section precision molded elastomer seat, held in place by the bolted body to prevent pullout or shifting in the body. Simple to replace, no shimming or trimming.
  • Seat is available in EPDM, NBR, HNBR, Natural Rubber, FKM or other elastomers with a maximum temperature rating up to 200°C (400°F) with proper elastomer selection.
  • Superior all-around the gate packing assembly, no special tools or unique packing materials to maintain or replace. Optional live-loaded packing for high cycle applications provides continual load.
  • Optional fluoropolymer or proprietary SSEC coating can be applied to gate or body. Formulated to minimize media adherence (anti-stick) and improve abrasion resistance; apply to gate to extend seat and packing life or use on the body, interior or exterior, for additional protection.