Control valve type introduction:

Control valve,also known as the regulating valve, general control valve type is electric control valve,pneumatic control valve, self operated control valve,pneumatic control valve body type through the acceptance of the control signal control unit output, the dynamic operation to change the flow.Control valve is generally composed of actuator and valve.If by their ticket enforcement agencies use the power, the control valve can be divided into pneumatic control valve, electric valve, hydraulic control valve, namely to compressed air to power sources pneumatic - valve, with electricity as the power sources of electric regulator, as a liquid medium (such as oil) pressure as the power of electric hydraulic control valve, in addition, according to its function and feature points, and the hydraulic control valves, solenoid valves, electronic style, smart, the total linear regulator, etc. 
 
Control valve body types are many series, the commonly used types of valve body have straight single seat, straight double seat, Angle, diaphragm, small flow, tee, eccentric rotation, butterfly, sleeve, spherical, etc.In the specific choice, can do the following consideration: when the temperature of the medium, high pressure and change, should choose the valve core and valve seat material by temperature, pressure change small valve.