The Brief Introduction of Forged Steel Gate Valves

Forged steel gate valves are valves whose wedges move vertically along the center line of the fluid, and they are mainly used for cutting off the fluid in the pipeline. The opening and closing part of the forged steel gate valve is a wedge. The movement direction of the wedge is perpendicular to the direction of the fluid. The forged steel gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled. There are two sealing surfaces for wedges of forged steel gate valves. The two sealing surfaces of the forged steel gate valve form wedges and the angle of the wedge varies with valve parameters. Forged steel gate valves can be driven pneumatically, electrically, manually, pneumatically and hydraulically. Forged steel gate valves are used for small diameter pipelines with working pressure of Class150 to 2500. Carbon steel forged gate valves can be used in a operating temperature of from -29 to 425℃ and stainless steel forged gate valves are suitable for working in a operating temperature of from -29 to 500℃. Forged steel gate valves are used to cut off or connect the medium in the pipe, which are mainly applied to petroleum pipelines.
 
There are three bonnet designs for forged steel gate valves.

Bolted bonnets
Forged steel gate valves can be connected by concave and convex surfaces with stainless steel strips and flexible graphite spiral wound gaskets or rings according to requirements.

Welded bonnets
Forged steel gate valves can be welded after sealed by threads or rigid welding can also be used directly based on requirements.

Self-sealing bonnets
Forged steel gate valves can be connected by self-sealing bonnet and threads.

Structural analysis of forged steel gate valves
Full bores or reduced bores
Rising stems with yokes
Packing sleeves with automatic centering at both ends
Bolted bonnets with spiral wound gaskets, welded bonnets with screw sealed, or self-sealing  bonnets
The body being reversely sealed
Socket welding ANSI/ASME B16.11
The threaded end (NPT end) being in accordance with ANSI/ASME B1.20.1

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