Knife Gate Valves

Knife Gate Valves
  • Performance
  • Reliability
  • Experience


    MERRICK Knife gate valves can be utilized as isolation valves located at the feeder outlet, pulverizer outlet or in the burner line at the furnace face. These valves provide “off-on” control of the material of varying sizes.


  • Laminated mild steel plate insert and bolted / welded construction for greater strength, durability and ease of maintenance
  • 3/4” corrosion-resistant Type 304 stainless steel blade polished to a 2B finish with machined cam guides for smooth operation and positive seal
  • Fiberglass packing with high temperature silicone lubricant for positive pressure seal and operation up to 1000oF
  • Low profile design to minimize wear
  • NFPA 85 (2001 addition) rated (50 psi explosion)
  • Standard flange patterns are per ANSI 125/150
  • Abrasion resistant body
  • Designed for coal dust and fly ash contamination
  • Easy field replacement of packing material


  • Manual operator (handwheel or pocket sheave and chain), hydraulic, electrical or pneumatic actuator
  • Complete pneumatic or hydraulic packages with limit switches and solenoid valves, piped and wired, ready for customer connection to power and control source
  • Non-standard bolting patterns and bolt circles
  • Rising stem operator or non-rising stem operator
Knife Gate Valves


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