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STV Valve Technology Group Co., Ltd.
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  5. STV - Model ANSI 300lb - Bellow Seal ...

STV - Model ANSI 300lb -Bellow Seal Gate Valve

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ANSI 300lb Bellow Seal Gate Valve,Wcb Body,3 Inch,RF Flange End. STV Valve Technology Group Co., Ltd is a professional leader China Ansi 300lb Bellows Seal Gate Valve,Wcb Bellows Seal Gate Valve,3 Inch Bellows Seal Gate Valve,RF Flange End Bellows Seal Gate Valve Manufacturer with high quality and competitive price.

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  • 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.
  • Hot oil system, steam system, hot and cold water system etc.
  1. Bellow seal element. The key part of bellow sealed globe valves is mental bellow. It is the connection between cover and stem with automatic roll welding. The mental bellow can keep the stem part no leakage.
  2. Double seal design(bellows+packing). Bellow and packing can protect against leakage and provide a excellent seal.
  3. Grease nipple. It can direct lubricate the stem, nut and sleeve.
  4. Ergonomic hand wheel. It provide longer service life and easier operation.
  • Design standard: ASME B16.34
  • Face to face dimension: ASME B16.10
  • Flanged ends: ASME B16.5
  • Test & inspection: API 598