Bellow Sealed Gate Valve

The valve stem of the bellows valve adopts double sealing structure of bellows and packing to ensure the leakage and seal at the stem, especially for flammable, explosive, toxic and valuable medium. Bellows are made of stainless steel or Inconel material. The bellows seal structure is reasonable, fatigue resistant and long service life.

Standard specification

Design and manufacture:API 602,BS 5352,ANSI B16.34.
Connection ends conform to:
    -Socket welded ends:ANSI B16.11.
    -(NPT threaded)Screw ends:ANSI B1.20.1.
    -Butt-welded ends:ANSI B 16.25.
    -Flanged ends:ANSI B 16.5.
Inspection & testing:API 598.
Tag: MSS SP 25.

Special Design

    -Bellow Seal forged gate valve.
    -Cryogenic forged gate valve.
    -Extended body forged gate valve.
    -Venting forged gate valve.
    -Twins forged gate valve.

Construction features

Non-Rising Handwheel,
Outside Screw And Yoke,Rising Stem.
Integral Backseat.
Solid Wedge,Renewable Seat Rings,Sprial Wound Gasket.
Spring Loaded To Ensure That Even In The Low-Pressure Sealing Performance As Well.
Low Leakage Test Stem Packing By.
Automatically Adjust The Preload Gland Packing.

Application

  For valves which size is smaller than 2"(DN50), forged steel valves are recommended. Compared with castings,forged valve offer the advantages of more uniform structure, greater density, higher strength integrity, enhanced dimensional characteristics and closer dimensional tolerances.Owing to so many advantageds,the forged valve can be widely used in the fields of petroleum,natural gas,chemical,power and other industries.