In the daily use of Axial on-off valve users, people often reflect a problem, namely Axial on-off When the valve is used on a medium with a large differential pressure, such as steam, high-pressure water, etc., it is often difficult to close. No matter how hard it is closed, it is always found that there is leakage, it is difficult to close, causing the cause of this problem. It is caused by the structural design of the valve and the insufficient output torque of the human limit level.
The main reasons for the internal leakage of the Axial on-off valve are:
Axial on-off valves are generally used in boiler outlets, main sub-cylinders, steam mains, etc. These locations have the following problems:
1) The general pressure difference of the boiler outlet is relatively large, so the steam flow rate is also larger, and the erosion damage to the sealing surface is also greater. Another furnace igniting high efficiency is not 100%, which will result in a large amount of vapor moisture in the inlet and outlet of the furnace, which is very easy to cause cavitation and cavitation damage to the gate surface.
2) For the shut-off valve around the inlet and outlet of the heating furnace and the sub-cylinder, there is intermittent over-temperature condition due to the steam just coming out of the heating furnace. In the whole process of the saturated state, if the heating furnace water becomes soft, it is not very good. If you get it, it will dissolve some of the strong acid and alkali chemicals, which will cause erosion and erosion on the surface. Some crystallized chemicals will also adhere to the crystal of the gate valve, resulting in a tight seal of the gate valve.
3) The cylinder inlet and outlet trade gate valve, due to the use of steam after the valve due to production regulations, etc., the use of steam is large and small, in the case of large changes in water flow, it is very easy to cause flashing, cavitation, etc. The condition, in turn, causes erosion and cavitation damage to the gate surface.
4) Usually, when the large pipe is opened by the pipeline, the pipe must be heated. The whole process of heating usually stipulates that the total flow rate of steam is not based on, so that the pipe is slowly and evenly heated to a necessary level, and the shut-off valve can be completely opened to prevent the pipe from being caused. Extremely warming caused too much soaring, destroying a part of the joint position. But throughout the process, Axial The on-off valve opening degree is therefore very small, which leads to the erosion rate far exceeding the actual effect of all normal applications, and the use period of the gate valve face is seriously reduced.
Related News
- Axial flow regulators have been so useful, no wonder so hot
- Axial flow control valves are now the world's core components
- Self-operated gas pressure regulating valve worm gear transmission adjustment and wiring method
- Axial valve manufacturers have years of experience delivering positive energy
- Principle and maintenance of safety shut-off valve for gas pressure regulating device
- Knowledge collection of pressure reducing valve for gas pressure regulating device
- What is the role of axial flow safety shut-off valves in various fields?
- Axial flow electric pressure regulator common problem diagnosis and maintenance
- Axial Control Valve professional structure, a new development pattern
- What are the main features of the axial flow regulator?
- Compressor anti-surge valve successfully passed the national new product identification
- The maintenance of the axial flow control valve must be in place to improve efficiency.
- Routine maintenance and maintenance of nitrogen axial flow regulator
- 防喘振阀的应用可以防止浪涌的影响
- 自力式气体调压阀原理可用于节流应用或开/关应用
- 做好一个阀 为工业强基贡献力量