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Power

Valves That Withstand the Heat of Power Generation

Steam, heat, and cycling wear down ordinary valves fast. Vestra Valve products are different. With chromium-carbide coated seating, mate-lapped surfaces, and high-strength Belleville springs, they resist erosion, maintain seal integrity, and deliver lasting zero-leakage shutoff. Built for thermal shock and constant cycling, Vestra valves help keep power plants online longer.

Applications:
• Steam isolation in combined-cycle plants
• Turbine bypass systems
• Boiler vent and blowdown service
• Safety and emergency shutdown

Why Vestra for Power: Downtime is costly in power. Vestra valves are designed for fast in-line repair, so seating components can be replaced without removing actuators or welding. That means less downtime, less maintenance spend, and more megawatts delivered. With every valve built and tested in Houston, you get performance backed by American craftsmanship.

Features & Benefits

Available sizes

  • 3/4" (20 mm) - 4" (100 mm)

End connections

  • Socketweld
  • Buttweld
  • Flanged (Upon Request)
  • Threaded (Upon Request)

Body materials

  • SA-105
  • SA-182 F22 CL 3
  • SA-182 F91
  • SA-182 F92 (Upon Request)

Seating components

  • Rocket applied, Chromium Carbide coatings
  • Industry leading hardness, resistant to erosion, corrosion, and thermal shock
  • Constant contact seating surfaces protected from flow
  • Mate-Lapped for full, 100% contact seating surfaces
  • Pressure assist seating and high strength Belleville Spring ensure zero-leakage shutoff at all pressure differentials

In-line repairability

  • Split Body Design allows for full replacement of all critical seating components without removal of actuation

Operating mechanisms

  • Integral T-Shoulder blowout proof stem
  • Live-Loaded Packing and 1/4 turn operation for zero fugitive Leakage and minimal wear and tear
  • Robust mounting bracket supports all actuation methods in any position
  • Extended mounting bracket accommodates power industry practices for high temperature insulation thickness
  • Hard stops on the mounting bracket prevent actuation overtravel and guaranties a perfect ball and seat alignment in the open position
Responsive Table (Sticky Header)
Class Mat*† Temperature (°F)
-20 - 100 200 300 400 500 600 650 700 750 800 850 900 950 1000 1050 1100
ASME 3100 Max allowable
pressure
(psig)
A105 7750 7750 7651 7572 7572 7572 7391 7142 6554 5314 - - - - - -
F22 7750 7750 7639 7520 7484 7452 7396 7308 7308 7308 7000 6200 5098 3983 2604 1635
F91 7750 7750 7750 7750 7750 7750 7750 7576 7528 7440 7000 6200 5098 5012 5012 4442
Class Mat*† Temperature (°C)
-29 - 38 50 100 150 200 250 300 325 350 375 400 425 450 475 500 538 550 575 600
ASME 3100 Max allowable
pressure
(bar)
A105 534.3 534.3 534.6 527.4 522.6 522.1 522.1 517.8 505.4 486.7 448.5 371.5 - - - - - - -
F22 534.3 534.3 534.4 527.5 519.0 516.5 514.4 512.5 508.4 503.8 503.8 503.8 487.5 441.8 368.9 274.7 232.8 156.8 -
F91 534.3 534.3 534.3 534.3 534.3 534.3 534.3 531.4 521.9 518.8 513.0 487.5 441.8 368.9 345.6 340.7 277.3 -
Responsive Table – Mobile Toggle (Cards + Show More)
Temperature (°F)
ASME 3100 allowable pressure by temperature (°F)
Class Mat*† -20 - 100 200 300 400 500 600 650 700 750 800 850 900 950 1000 1050 1100
ASME 3100 (Max allowable pressure: psig)
A105 7750 7750 7651 7572 7572 7572 7391 7142 6554 5314 - - - - - -
ASME 3100 (Max allowable pressure: psig)
F22 7750 7750 7639 7520 7484 7452 7396 7308 7308 7308 7000 6200 5098 3983 2604 1635
ASME 3100 (Max allowable pressure: psig)
F91 7750 7750 7750 7750 7750 7750 7750 7576 7528 7440 7000 6200 5098 5012 5012 4442
Temperature (°C)
ASME 3100 allowable pressure by temperature (°C)
Class Mat*† -29 - 38 50 100 150 200 250 300 325 350 375 400 425 450 475 500 538 550 575 600
ASME 3100 (Max allowable pressure: bar)
A105 534.3 534.3 534.6 527.4 522.6 522.1 522.1 517.8 505.4 486.7 448.5 371.5 - - - - - - -
ASME 3100 (Max allowable pressure: bar)
F22 534.3 534.3 534.4 527.5 519.0 516.5 514.4 512.5 508.4 503.8 503.8 503.8 487.5 441.8 368.9 274.7 232.8 156.8 -
ASME 3100 (Max allowable pressure: bar)
F91 534.3 534.3 534.3 534.3 534.3 534.3 534.3 531.4 521.9 518.8 513.0 487.5 441.8 368.9 345.6 340.7 277.3 - -