In the specific choice, the following consideration can be made:
(1) the shape structure of the valve core
It is mainly considered according to the selected flow characteristics and unbalance force.
(2) wear resistance
When the fluid medium is a suspension containing high concentration of abrasive particles, the internal material of the valve should be hard.
(3) corrosion resistance
As the medium is corrosive, choose the simple valve as far as possible.
(4) the temperature and pressure of the medium
When the temperature and pressure of the medium are high and large, the valve and valve seat material shall be selected with a small temperature and pressure change. When the temperature is &ge, and the temperature is 250 degrees, the radiator should be added.
(5) prevention of flash and cavitation
Flash and cavitation are produced only in liquid medium. In the actual production process, flash and cavitation will form vibration and noise, shorten the service life of valves, so we should prevent flashing and cavitation of valves when selecting valves.
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