Choke Valves

French
The operation of a choke valve is generally by a hand wheel device screwing down a stem, which is connected to a “flow limiter” device (for example a cylinder with a hole in it). As the cylinder rises and falls in the sleeved bore, the cross sectional area for flow increases or decreases accordingly. Choke valve occasionally have “full closure” capability.

The primary function of a choke valve is for flow restriction. Choke valves are highly susceptible to erosion / flow damage by the nature of their operation, particularly where solid particles are present in the process medium. Choke valves are not designed to reduce pressure.
 

Choke Valves Specification

Choke Valves - General Design Criteria  
  • Manual Handwheel, Gearbox, Air or Electric Actuator Operated
  • Special Trim Design Options
  • Manual Over-ride Options
  • Operating temperature and fluids suitability - further information on request
  • Firesafe / Cryogenic / Gas Service certified options
  • Modification service available for all stock options
Standard Pressure Class Ratings / End Connections
  • ANSI 150, 300, 600, 800, 1500 & 2500lb - Flanged RF, RTJ, Butt-Weld and Hub ends
  • PN, API and other Pressure Class Valves available on request

Common Materials of Construction Material Specifications
Standard Carbon Steel ASTM A105
A216 WCB
WCC
Low temperature Carbon Steel ASTM LF2
A352 LCC
LCB
Stainless Steel ASTM A182 F316
ASTM A182 F316L
ASTM A182 F304
ASTM A182 F304L
ASTM A182 F321
ASTM A182 F347
ASTM A351 CF8M
ASTM A351 CF3M
Specials F44
SMO
F51
Duplex
Super Duplex
Monel
Hastelloy
Titanium
Inconel
Bronze
Alu. Bronze
Other Actuated
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