Plug Valve

Plug valves are very similar to ball valves, again quarter turn operation via manual hand lever or other actuating device. The seat to seal interface is created by the polished plug rotating within the valve body. It can be a straight plug, or a tapered plug depending on the performance required for the process conditions. Energisation is by mechanical force, which is built in to the valve at the assembly stage to the valve. Lubricated and lined plug valves also offer varying degrees of tight shut-off and operating torque requirements.

The primary function of a plug valve is isolation i.e. either fully open or fully closed and the secondary function can be reduction. This is achieved by tapering the valve bore and reducing the aperture in the through port in the middle of the plug.
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Plug Valve Specification

Click for more Plug Valves - General Design Criteria  
  • Tapered or Parallel Plug Options
  • Manual Lever, Gear or Actuator Operated
  • Bolted or Welded Construction
  • Special Seat Design Options
  • Operating temperature and fluids suitability - further information on request
  • Firesafe / Cryogenic / Gas Service certified options
  • Modification service available for all stock options
Click for more Standard Pressure Class Ratings / End Connections
  • NSI 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
Plug Valve