Features and benefits

• Long cycle life bellows (3000 cycles): Gr. 321 (stainless) for Class 800, Gr. 321 or Inconel for Class 1500, and Hastelloy C for chlorine service. Optional materials available on request. Designed and qualification-tested for high pressure/temperature service.
• Bellows monitoring port (optional): A plug can be connected with 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 alloy and wedge is solid CoCr alloy.