Globe Valve
Globe valve is a linear motion valve, mainly used to open and close the flow of fluid in the pipeline. It has a simple structure, easy operation and good sealing performance. It is widely used in various industries such as petroleum, chemical industry, electric power, metallurgy, and pharmaceuticals.
Structure And Working Principle Of Globe Valve
Globe valve is mainly composed of valve body, valve cover, valve stem, valve disc, valve seat and other components. There is a fluid channel inside the valve body, and the valve disc controls the opening and closing of the channel through the up and down movement of the valve stem.
- Open state: The valve stem drives the valve disc to move upward and leave the valve seat, the fluid channel is opened, and the medium can flow.
- Closed state: The valve stem drives the valve disc to move downward and fits tightly with the valve seat, the fluid channel is closed, and the medium cannot flow.
Characteristics Of Globe Valve
Advantages:
Good sealing performance
The globe valve adopts the line contact seal between the valve disc and the valve seat, and the sealing surface is precisely processed to ensure zero leakage of the valve in the closed state.
Small opening and closing torque
The valve disc and the valve stem of the globe valve are threaded. When opening and closing, you only need to rotate the valve stem, which is easy to operate.
Simple structure and convenient maintenance
The stop valve has a simple structure, is easy to disassemble and assemble, and is easy to maintain and repair.
Disadvantages:
Large Fluid Resistance
The flow channel of the stop valve is S-shaped, and the fluid flow direction changes, resulting in large fluid resistance.
Long Opening And Closing Time
The valve disc of the stop valve needs to completely leave the valve seat to achieve full opening, and the opening and closing time is long.
Advantages Of The Stop Valve
- Reliable sealing performance: The stop valve adopts a line contact seal between the valve disc and the valve seat, and the sealing surface is precisely machined to ensure zero leakage when the valve is closed.
- Accurate flow control: The valve disc of the stop valve can accurately adjust the opening to achieve precise control of the flow rate and meet the needs of different working conditions.
- Wide applicability: The stop valve can be applied to a variety of media such as water, steam, oil, gas, etc., and the appropriate material and structure can be selected according to different media and working conditions.
- Easy to maintain: The stop valve has a simple structure, is easy to disassemble and assemble, and is easy to maintain and repair.
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