Leslie K-Max Rotary Control Valve

K-Max Control Valves

K-Max is designed and engineered to handle nearly all industrial process control requirements. For over 15 years, the K-Max has been in successful service, worldwide, in thousands of applications, including: high- and low-pressure steam; clean, dirty, and corrosive liquids and gases; and erosive and abrasive slurries. Other features include reduced port trim options, class V shutoff option, Alloy 6 trim hardening option, bi-directional flow capability (while maintaining shut-off class in either direction), and triple bearing large diameter precision splined shaft for tortional and flexural rigidity with excellent radial support. Efficient straight-through flow design allows for a much lower cost per Cv than conventional globe style valves, with the same degree of quality people have come to expect from Leslie. Includes:

  • High and Low Pressure Steam
  • Clean, Dirty and Corrosive Liquids
  • Clean, Dirty and Corrosive Gas
  • Erosive and Abrasive Slurries


  • Dual Spline Driven Shaft
  • Large Diameter 17-4PH Stem
  • Triple Bearing Shaft Support
  • Long Packing Life and Minimized Emissions Hazard
  • Fewer Possible Leak Paths
  • Easy Trim Size Changes
  • Customized Trim Options
  • Tight Shutoff Over Extended Service Life
  • Easy Maintenance and Clean-out

Highly Customized Trim Options: Stainless Steel and Stellite for a Variety of Applications Such as Slurry Service, Corrosive Chemicals, Erosive Conditions, Superheated Steam.


CS, SS, WCB, CF8M, Exotics




Eccentric Rotary Plug Action, Self-aligning Orbital Seat, 100:1 Rangeability, Bi-directional Flow Capacity


Wafer Style, Separable Flanged, Integral Flanged


150 - 600#

Leslie Spring and Diaphragm Actuator

Spring and diaphragm actuators

Spring and diaphragm actuators are rugged high thrust units with flanged yoke to bonnet connections for simple maintenance and better access to stem packing. These workhorses of our control valve lines have been proven and perfected for nearly forty years of in-service usage. They are available in four sizes: 35, 55, 85, and 135 in.


  • Compact with strength for quick, accurate control
  • Rugged cast iron or aluminum yoke with steel covers for long, trouble-free service


35, 55, 85, 135


Aluminum, Cast Iron


Max air pressure:60

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