Your browser does not support the HTML5 canvas element. Please use an up-to-date browser.

To view on Desktop

  • Click and drag using your mouse to rotate the model.
  • Zoom in and out using the scroll wheel on your mouse.
  • Right click and drag or hold CTRL + move your mouse to pan the model horizontally and vertically.

To view on a Mobile Device

  • To move the model around, use your finger to swipe left, right, up or down.
  • To zoom in and out on the model, pinch your fingers together or apart on the screen.
  • If you want to rotate the model, use two fingers to twist the screen.

Loading 3D model...

GVG 3000 Main steam safety valve

SEBIM®

GVG 3000 Main steam safety valve

The SEBIM® POSV type GVG 3000 is designed for overpressure protection of the nuclear steam supply system in all designs of nuclear reactors. The SEBIM® POSV GVG series was developed for overpressure protection of the steam generator or the main steam lines of all designs of nuclear reactor. The GVG series is the tubeless design of the previous SGSV series and uses some tubing interface with piloting systems in operation since the 1990’s.

MAIN CHARACTERISTICS

  • Autonomous piloting system using the fluid in the protected process (no external source of energy is needed for operation)

  • No-Flow piloting system

  • Compact & tubeless design (drilling integral through valve body; reduced size & weight)

  • Excellent leak tightness (the disc and the nozzle are leak tight up to the point of opening and immediately again after closing)

  • No erosion of sealing faces; no chattering

  • Proven perfect repeatability and reliability

  • System insensitive to back pressure

  • Stable system: no mass spring effect

APPLICATIONS

  • Steam Generator Safety Valves

  • Main Steam Lines Safety Valves

DESIGN RATINGS

  • ASME Class 150 to 2500 or customized

PRESSURE CLASS & POWER

  • 43 - 2,900 psi (0.3 - 20 Mpa)

MATERIALS

  • 393 T/h - 5,6 Mpa (Saturated Steam) adaptable

UPGRADES & ADAPTATIONS

  • Stainless steel

  • Carbon Steel

  • Special materials upon request

KEY FEATURES & BENEFITS

  • Excellent operation irrespective of fluid type; steam, gas, liquid or two-phase

  • Leak tightness up to the set-pressure minimises the mechanisms rate of ageing

  • Non-flowing pilot valve minimises the mechanisms rate of ageing

  • Proven reliability

  • Excellent accuracy (better than 1%)

  • Repeatability (lower than 1%)

  • Soft opening/closing decreases load on surrounding equipment

  • Low or high pressure in-situ test during operation for preventative maintenance

  • In situ testing with or without pressure in the protected system

  • Maintained stability even when flow capacity is below the maximum rate

  • Reduced maintenance over a 10 years operating cycle

  • Tubeless design

DESIGN STANDARDS

  • All main standards including RCC-M level 2, ASME section III Sub.NB Class 2, OTT, IEEE, NNSA

SIZE RANGE & DIMENSIONS

  • 0.5 - 16 inches (15 - 400mm) (DN 25 - DN400)

TEMPERATURE RANGE

  • Up to 576°C (1069°F)

Downloads