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Masq Engineers

We are manufacturers of industrial valves.We “MASQ Engineers” are a prominent firm that is engaged in Manufacturing of a wide range of valves meant for large scale industries.We have a comprehensive range of products which can serve your extensive needs. Our product range includes Check Valves, Ball... Read more

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Wafer Lugged Knife Gate Valve

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Wafer Lugged Knife Gate Valve

Specification Details
Manufacturing Standard MSS SP-81
Inspection & Testing MSS SP-81
Material of Construction Cast Iron, Carbon Steel / SS 304, SS 316, SS 304L / SS 316L and Other Alloys
End Connections Flange Type, Two Lugs, Full Lugs, Wafer Type, Flange End
Pressure Rating 150# / 300#
Operation Manual / Gear, Electrical Actuated and Pneumatic Actuator Operated
The Wafer Lugged Knife Gate Valve is a specialized industrial valve engineered for dense, abrasive, or viscous media. Unlike standard gate valves, it features a sharpened stainless steel "knife" edge designed to cut through thick fluids, slurries, and solids, ensuring a positive shut-off in the most demanding conditions.

The Lugged design features threaded bolt holes (lugs) around the valve body, allowing it to be bolted directly to flanges. This enables dead-end service, meaning the downstream piping can be removed while the valve remains securely pressurized in the line.

Key Performance Features:-
  • Self-Cleaning Blade: The beveled knife edge shears through packed solids and wipes the seat clean during every closure, preventing material buildup.
  • Space-Saving Wafer Design: The slim, short face-to-face profile is lightweight and ideal for systems with limited space.
  • Bi-Directional or Uni-Directional: Available in configurations to handle flow from either side or optimized for high-pressure shut-off from one direction.
  • Resilient or Metal Seating: Choose between EPDM/Viton for bubble-tight seals or metal-to-metal seats for high-temperature and abrasive applications.

Common Applications:-

This valve is the industry workhorse for "dirty" applications where standard valves would clog or fail:

  • Pulp & Paper: Handling paper stock, recycled fibers, and wood chips.
  • Mining & Minerals: Managing heavy tailings, coal slurries, and abrasive grit.
  • Wastewater Treatment: Ideal for raw sewage, sludge, and grit chambers.
  • Bulk Handling: Controlling the flow of dry powders, pellets, and cement.
  • Chemical Processing: Managing viscous fluids and chemically aggressive media.

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