a disc shape of the structure
mainly based on the selected flow characteristics and unbalanced forces and other factors considered.
2 wear resistance
when the fluid medium is a suspension containing a high concentration of abrasive particles, valves internal materials to be hard.
3 corrosion
as a corrosive medium, try to choose simple valve.
4 medium temperature, pressure
when the medium temperature, high pressure and great change, and should be chosen disc and seat materials by temperature and pressure changes small valves.
5 prevents steam and air
steam and air only in a liquid medium. in the actual production process, steam and air will form a vibration and noise, shortening the life of the valve, so the valve to prevent the valve should be chosen to produce steam and air.
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valve of choice to do those types of considerations