With the development of my country's social economy and technological progress, some valve manufacturers have produced a higher level of automation. The role of automatic instruments in the production of enterprises has become increasingly apparent. Especially in petrochemical enterprises, the safety of the operating conditions of the double-coil solenoid valve depends on the monitoring of instruments, and these instruments can also greatly improve the production efficiency of the enterprise.
Control valve
The governor is an important device for adjusting process parameters such as medium flow, pressure, temperature, and liquid level in the field of industrial automation process control. According to the control signal in the automatic control system, the governor's opening is automatically adjusted, so that the solar solenoid valve Realize automatic adjustment of process parameters such as medium flow, pressure, temperature, and liquid level.
As we all know, if the water solenoid valve is replaced frequently, it not only wastes time, but also affects the interests of the enterprise. Then, how to reduce the frequency of replacement, that is, to extend the service life of the water solenoid valve?
There are two specific methods to increase the working opening by reducing the diameter of the solenoid valve for water. One is to change a valve with a small, one-step diameter, and the other is to change the valve body without changing the valve body and replace the valve core with a larger diameter. Small valve seat.
Change the flow direction, flow from open to open, cavitation and erosion mainly act on the sealing surface of the valve core, and the root of the valve core and the sealing surface of the valve seat are easily damaged. The closed type flows in the closed direction. After the ultra-high pressure solenoid valve is throttled, air bubbles and erosion act below the sealing surface of the valve seat to protect the root and sealing surface of the valve core and prolong the service life. Therefore, when the valve is flow-open, when the problem of extending the life is very prominent, only changing the flow direction of the valve can prolong the life of the water solenoid valve by 1-2 times.
Decrease S, that is, increase the loss in the system except the water solenoid valve, so that the pressure drop distributed to the valve is reduced. In order to ensure that the flow passes through the water solenoid valve, the opening needs to be increased. At this time, the pressure drop on the valve is reduced. Small, so that cavitation and erosion are also weakened. The specific method is to set an orifice throttling behind the valve to consume the pressure drop, and close the manual valve connected in series with the pipeline until the working opening reaches the ideal state.
Displace the severely damaged part to the secondary position to protect the sealing surface and throttle surface of the valve core and seat.
In order to prevent cavitation (destroying shapes such as honeycomb holes) and scouring (streamline pores), the throttle can be made of special materials resistant to cavitation and erosion. The special materials include 6YC-1, A4 steel, Stellite, cemented carbide, etc. Good anti-corrosion performance, can be changed to materials with better corrosion resistance and certain mechanical and physical properties. Such materials can be divided into two types: non-metallic materials (such as rubber, tetrafluoroethylene, ceramics, etc.) and metallic materials (such as Monel, Hastelloy, etc.).
Change the regulator structure or choose a valve with a longer life to achieve the purpose of improving life, such as selecting a multi-stage pressure reducing valve, anti-corrosion valve and anti-cavitation valve.
