Type 1711HD Severe Service Control Valve


The U.S. Type 1711HD High-Pressure Severe Service Control valve has a working pressure of up to 10,000 psi (689 bar). The 1711HD
features a high-pressure bar stock body with a union bonnet. This unit features an oversized stem and extra heavy-duty guided inner valve for added strength and longevity. The stem packing is designed for tight sealing, long life, and easy maintenance. The union bonnet with a graphite gasket provides excellent sealing without having bonnet threads in contact with the process fluid. The multi-spring, field adjustable 35 square-inch, diaphragm actuator can be either ATO or ATC action. Maximum corrosion protection on all non-stainless actuator components is standard.


The valve has performed in some of the most extreme environments in the world. Tough applications within the chemical and the oil and gas markets is where you can find this valve.




  • 1/2 in. (12 mm) model
  • Interchangeable trim sets
  • Heavy-duty union bonnet
  • Different trim characteristics available (linear, equal percent,
    quick open or double taper)
  • TFE chevron packing
  • Stellite inlaid inner valves
  • ANSI Class IV shutoff
  • High pressure and temperature rating
  • Encapsulated graphite body bonnet gasket
  • Dual IEC 534 (NAMUR) accessory mounts
  • Adjustable spring preload and up-travel stop


  • Butt and socket weld ends, BSPP, tube connection, and others
  • Bonnet extensions for different temperature extremes
  • Bellows packing solutions
  • Reduced Emissions Kalrez (REK), graphite, spring-loaded chevron and others
  • Exotic alloys available for complete valves or trims
  • Stellited trims & Soft seats (PTFE & Kel-F) available
  • TiN coating of inner valve stem and seat
  • Purge or leak ports available