Regulating valve and name control valve of vehicles, by accepting conditioning control module export control signals from engine operation to change fluid flow. Regulating valve general, the executing agency of the valve. If by their ticket enforcement agencies use the power, control valve can be divided into pneumatic control valve, electric control valve, hydraulic control valve three, namely to compressed air to power sources pneumatic - valve to call for the engine electric control valve for the liquid medium (such as oil) pressure-driven electricity fluid moving control valve, in addition, according to the function and the characteristic points, linear characteristic, equal percentage characteristics and parabolic characteristic three. The total linear regulator, etc.

Control valve body is a lot of more phyletic, commonly used body types is through single seat, through two seater, Angle, diaphragm, small flow, tee, eccentric rotating, butterfly, sleeve, globose, etc. In the concrete when the choice, but do consider as follows:

(1) the valve core shape structure
Mainly based on the choice of flow characteristics and consider factors such as the unbalanced force.
(2) the wearability
When the fluid medium contains high concentration abrasiveness particle suspension, valve internal material should be hard.
(3) corrosion resistance
Due to the medium corrosive, try to choose structure simple valves.
(4) medium temperature, pressure
When the medium temperature, high pressure and great change, should choose valve core and valve seat materials by temperature, pressure changes small valves.
(5) prevent flash and cavitation
Flash and cavitation makes in liquid medium. In the actual production process, flash and cavitation can form vibration and noise, shorten valve life, so the choice valve should prevent valve produce flash and cavitation.