Flange globe valve has a reasonable structure, excellent performance, beautiful appearance, and wide applicable pressure range. It is mainly used to connect or cut off the medium in the pipeline. It has the advantages of wear resistance, high-temperature resistance, good abrasion resistance, and long service life.
Structural features of the flanged globe valve:
1. The flange cut-off valve is well-selected, meets domestic and foreign standards, and has a reasonable structure and beautiful appearance.
2. The sealing surface of the valve disc and the valve seat adopts iron-based alloy surfacing or Stellite cobalt-based.
3. Hard alloy surfacing welding, wear resistance, high-temperature resistance, corrosion resistance, good scratch resistance, and long service life.
4. The valve stem undergoes quenching and tempering and surface nitriding treatment and has good corrosion resistance and abrasion resistance.
5. Various piping flange standards and flange sealing surface types can be used to meet various engineering needs and user requirements.
6. The valve body has a complete variety of materials. The packing and gasket can be reasonably selected according to the actual working conditions or user requirements and can be applied to various pressure, temperature and medium working conditions.
7. An inverted seal is made of a screw-connected seal seat or body surfacing austenitic stainless steel. The seal is reliable. The packing can be changed without stopping, convenient and quick, without affecting the system operation.
8. Convenient maintenance, a simple structure of gate valve, the seal ring is generally movable, and it is more convenient to disassemble and replace.
9. When fully open or fully closed, the sealing surfaces of the ball and the valve seat are isolated from the medium, and the medium will not cause erosion of the valve sealing surface when the medium passes.
10. A wide range of applications, from small diameter to several millimeters, large to several meters, can be applied from high vacuum to high pressure.
The opening and closing parts of the flange globe valve are plug-shaped discs, the sealing surface is flat or tapered, the discs move linearly along the centerline of the fluid, and the structure of the valve body has straight-through, DC and right-angle types.
Flanged Globe Valve
The working principle of the method flange globe valve:
Flange globe valve is a compulsory sealed valve, so when the valve is closed, pressure must be applied to the disc to force the sealing surface to not leak. When the medium enters the valve 6 from below the valve disc, the resistance to be overcome by the operating force is the frictional force of the valve stem and the packing and the thrust generated by the pressure of the medium. The force to close the valve is greater than the force to open the valve. The diameter of the stem must be large, otherwise, the failure of the valve top bend will occur.
Globe valve manufacturer introduces the structural features of flange globe valves:
1. Compact structure, beautiful appearance, and excellent performance. The valve disc and valve stem adopt a flexible connection structure, which is flexible to open and close. The valve stem is designed with an inverted seal pair to improve the service life and sealing performance of the valve.
2. The material pairing of the sealing pair is reasonable, and the friction between the valve disc and the valve seat is small and the service life is long.
3. The surface of the valve stem is nitrided and has good corrosion resistance and friction resistance. The packing uses PTFE material, which has the reliable sealing, flexible operation and small opening and closing torque.
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