Small Forged Steel Bellows Seal Gate Valves for Nuclear Applications

Caractéristiques et avantages

Available for nuclear class 1, 2, and 3 and safety related applications.

• Complies to ASME B16.34 standards.
• A compact but extremely sturdy design for high pressure-temperature service.
• Packing rings are pre-compressed in the packing chamber to ensure equal stress distribution, effectiveness of all rings and a high integrity seal.
• For welded bonnet valves, the bonnet is threaded in and torqued to an engineered torque value and the body bonnet joint is strength-welded, offering double protection against leakage. (body/bonnet threads and strength-weld).
• CoCr alloy disc ensures low friction and long service life.
• For Class 800 valves and for steam service, seats are seal-welded to the body.
• Long cycle life bellows (2,000 cycles). Designed and qualification tested for high pressure/temperature applications.
• Bellows monitoring port (optional). A plug can be connected to the space above the bellows to monitor performance.
• Two secondary stem seals:
  a) Backseat in open position
  b) Graphite packing.
• Superior seating faces. Seats hardfaced with CoCr, disc is solid CoCr.