In the specific choice, do the following considerations:

    (1) valve core shape structure

Mainly based on the selected flow characteristics and unbalanced forces and other factors.

    (2) wear resistance

When the fluid medium is containing high concentration of wear particles suspension, the valve's internal material to be hard.

    (3) corrosion resistance

As the medium is corrosive, as far as possible to select the structure of the valve.

    (4) the temperature and pressure of the medium

When the medium temperature, high pressure and great change, should the valve core and valve seat materials chosen by temperature and pressure changes in the small valve. When the temperature is more than or equal to 250 DEG C should increase the radiator.

    (5) to prevent the flash and cavitation

The flashing and cavitation produced only in liquid medium. In the actual production process, the flashing and cavitation will form a vibration and noise, shorten the service life of the valve, so in the choice of the valve should be to prevent the valve to produce flashing and cavitation.