Features and benefits

• Long cycle life bellows (2000 cycles) in Gr. 321 (stainless), Inconel for special applications, (may be replaced with Monel trim to resist corrosion or Hastelloy C for chlorine service).
• Improved body-bonnet joint: Graphite reinforced with SS foil gasket for Class 150 valves. Fully-encased, spiral wound graphite-filled Gr. 316 (stainless) gasket for Classes 300-600.
• Bolted body-bonnet for fast serviceability. Hermetically-sealed bonnets available for Classes 300 and 600.
• Two or three section bellows assembly.
• Non-rotating stemprevents torsion of bellows.
• Two secondary stem seals:
  a) Backseat in open position;
  b) Graphite packing.
• Welded-in seat hardfaced with CoCr alloy.
• Wedge hardfaced with CoCr alloy for long life.
• Seating faces hardfaced with CoCr alloy, ground and lapped.