Types and selection criteria of control valves for refrigeration equipment

Types and selection criteria of control valves for refrigeration equipment The first thing to know is what is a control valve? A control valve, also known as a control valve, is mainly used in the field of industrial automation process control. Its function is to change the flow, pressure, temperature, etc. of the medium. The applicable media are air, water, steam, and various corrosive media. The materials used are cast iron, cast steel, stainless steel, etc. The driving methods are manual, pneumatic, electric and self-operated. This is the concept of the control valve. Then we need to know what kinds of control valves are there? There are many types of control valves on the market. The commonly used valve bodies are straight single seat, straight double seat, angle, diaphragm, small flow, three-way, eccentric rotation, butterfly , Sleeve type, spherical, etc. When choosing, you can refer to the following standards: Consider wear resistance: If the fluid medium is a suspension containing high concentrations of abrasive particles, the internal material of the valve should be harder. ! Consider corrosion resistance: Since the medium is corrosive, you should try to choose a valve with a simple structure. Consider the temperature and pressure of the medium: When the temperature and pressure of the medium are high and the change is large, the valve of the valve core and the seat material should be selected with little change in temperature and pressure. Consider preventing flashing and cavitation: Flashing and cavitation only occur in liquid media. In the actual production process, flash evaporation and cavitation will form vibration and noise, shorten the service life of the valve, so when selecting the valve, it is necessary to prevent the valve from flash evaporation and cavitation. . Consider the shape and structure of the valve core: mainly based on the selected flow characteristics and unbalanced forces. Through the above, the selection criteria of the control valve have been explained in detail. I believe that everyone will use it in the future selection of accessories. No matter what kind of refrigeration equipment is inseparable from these, mechanical parts with related functions, if the machine has problems that it cannot solve by itself, it must communicate with the manufacturer in time and let the manufacturer send someone to adjust or repair.

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