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Clarkson KS3 Severe Service Knife Gate Valve
Clarkson KS3 Severe Service Knife Gate Valve
Emerson’s Clarkson KS3 Knife Gate Valve is a high-performance, bi-directional valve specifically designed to meet the rigors of severe service applications.
This ASME Class 300 valve is characterized by its exceptional zero-leakage performance, ensuring extend valve life and service intervals, leading to a lower total cost of ownership.

Clarkson Knife Gate Valves in Mine Tailings

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Clarkson KS3 Severe Service Knife Gate Valve


Size Range
NPS 3 - 30 (DN 80 - 750)
Temperature Rating
Up to 400 °F (205 °C)
Pressure Rating
ASME Class 300
Mining and Minerals, Oil Sands, Pulp and Paper, Coal Preparation, Power, Steel
Design Standard
MSS SP-135, ASME B31.3
Face to Face
MSS SP-135 Short
End Connections
ASME 300, AS 2129 Table H, PN 50


  • True bi-directional flow and zero leakage shut-off - ensures that the valve effectively controls the flow of fluid in both directions, without any leakage
  • Heavy cross-section precision-molded elastomer seat - provides more surface area for superior isolation
  • Full round port and seat design - offers lower pressure drop across the valve and a longer service life in abrasive applications, enhancing the overall performance and durability of the valve.
  • Enclosed body design prevents any leakage to the outside environment
  • Field-adjustable, patented gate edge seal system prevents leakage through top of valve
  • Standard inlet and outlet replaceable, rotatable Ni-Resist wear rings extend service life
  • Modular frame design allows for installation of any standard accessory without modification