Type 1711 Severe Service Control Valve


The U.S. Type 1711 globe control valve is designed for modulating flow or pressure control in industrial and research applications at
temperatures of 850° F (454° C) or less (400° F, 204° C) maximum for TFE chevron packing and standard bonnet). The unit features
an oversized stem and an extra heavy guided inner valve for added strength and longevity. The stem packing is designed for tight
sealing, long life, and quick, 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, 35-square-inch, diaphragm actuator can be either ATO or ATC
action. Maximum corrosion protection on all non-stainless actuator components is standard. The spring preload is fully adjustable.


The valve is suited for many applications in chemical, petroleum and other industries requiring a rugged, compact, heavy-duty valve.




  • 1/2 in. (12 mm), 3/4 in. (19 mm) and 1 in. (25 mm) models
  • Interchangeable trim sets
  • Heavy-duty union bonnet
  • Trim characteristics: Linear, equal percent, quick open or
    double taper
  • TFE chevron packing
  • Stellite inlaid innervalves
  • 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 temperature extremes
  • Bellows packing solutions
  • Reduced Emissions Kalrez (REK), graphite, spring-loaded
    chevron and others
  • Exotic alloys for complete valves or trims
  • Stellited trims and soft seats (PTFE & Kel-F)
  • TiN coating of inner valve stem and seat
  • Purge or leak ports