Control valve

Control valve, also known as control valve, in the field of industrial automation process control, by accepting the control signal output from the regulating control unit, with the help of power operation to change the medium flow, pressure, temperature, level and other process parameters of the final control element. Generally consists of an actuator and a valve. If the stroke characteristics, control valves can be divided into straight stroke and angle stroke; according to the power used by the actuator, can be divided into pneumatic control valves, electric control valves, hydraulic control valves; according to its function and characteristics into linear characteristics, equal percentage characteristics and parabolic characteristics of three. Control valves are suitable for air, water, steam, various corrosive media, slurry, oil and other media. English name: control valve, bit number usually starts with FV. Control valve common classification: pneumatic control valve, electric control valve, hydraulic control valve, self-operated control valve.