Back To Top
Clarkson Model ZP300 Zero Pocket ASME 300 Knife Gate Valve
Model ZP300 Zero Pocket ASME 300 Knife Gate Valve
Designed for the extremes of oil sands applications, the zero pocket provides an uninterrupted flow across the valve, increasing service life and minimizing wear on downstream components
Clarkson Model ZP300 Zero Pocket ASME 300 Knife Gate Valve


ASME B16.34
Valve Size
PS 10 / DN 250, NPS 12 / DN 300, NPS 14 / DN 350, NPS 16 / DN 400, NPS 18 / DN 450, NPS 20 / DN 500, NPS 24 / DN 600, NPS 3 / DN 80, NPS 30, NPS 36, NPS 4 / DN 100, NPS 42, NPS 48, NPS 6 / DN 150
Valve Size Standard
Valve Type
Knife Gate Valve, Slurry Knife Gate Valve


  • Full round port, adaptable to match specific pipe I.D.s offers lowest possible pressure drop across valve and longer service life in abrasive applications.
  • Shut-off conforms to the requirements of ASME Class V.
  • True bi-directional flow and shut-off, can be installed in either direction.
  • Designed as a field repairable asset for a lower overall cost of ownership.
  • Heavy cross section precision molded urethane seat, simple to replace, no shimming or trimming.
  • Seat is held in place by the bolted body to prevent pullout or shifting in the body.
  • Cast bolted body available in CF8M, 2507, WCB/LCB or other materials.
  • Polymer chest liners to support gate through the full length of the stroke.
  • Two styles of replaceable and rotatable integral flow rings available: Internal rings are suitable for dead-end service; External rings are not for dead-end service.
  • Superior packing assembly is standard with live-loaded gland studs, providing continuous load.
  • No special tools or unique packing materials to maintain or replace packing, can be repacked with valve in-line (line pressure must be relieved).
  • Gate is standard with SSEC, formulated to improve abrasion resistance and extend seat and packing life. Other gate materials available.