Extended Body Gate Valve

Forged steel gate valve refers to the closing piece (gate) along the path of the central line of the vertical movement of the valve. The forged steel gate valve is mainly cut off in the pipeline. Forged steel gate valve is a widely used valve, and its general caliber DN or less 50 cutting device selects it. Forging steel gate valves are more common.

There are two types of valve cover design for forged steel extended body gate valves. The first type is a bolted valve cover. Valves designed according to this design form are connected to the valve cover with bolts and nuts, and sealed with spiral wound gaskets (made of 304 flexible graphite). When customers have special requirements, metal ring connections can also be used. The second design form is a welded valve cover. For valves designed in this design form, the valve body and valve cover are connected with threads, Full weld sealing. When customers have special requirements, penetration welding connection can also be used Extended body valves are suitable for gate, ball, and globe valves

1.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.
NACE MR 0175 on request
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.

2.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.

3.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 advantages,the forged valve can be widely used in the fields of petroleum,natural gas,chemical,power and other industries.   

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