Velan Inc
Velan - Cast Steel Bellows Seal Gate Valves
FromVelan Inc
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).
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- 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.
Size range(s)
- NPS 2 - 12
- (DN 50 - 300)
Pressure rating
- ASME Classes 150 - 600
Standard connections
- Flanged, Butt weld