What are the classification of the pneumatic control valve

Pneumatic control valve and control valve, in the field of industrial automation process control, by accepting conditioning control unit of the output control signal, from engine operation to change the medium flow rate, pressure, temperature, liquid level of the process parameters such as the final control element. And valve general, the executing agency. If the trip characteristics of pneumatic control valve can be divided into straight stroke and stroke; By their ticket enforcement agencies use the power, according to its functions and features are divided into linear features, such as percentage and parabolic characteristics of three. Pneumatic control valve applied to air, water, steam, all kinds of corrosive medium, mud, oil, etc. English name: the control valve, the ball on the pneumatic - valve commonly used classification: pneumatic pneumatic control valve, electric pneumatic control valve, hydraulic pneumatic valve, pneumatic - valve themselves. What are the classification of the pneumatic control valve of pneumatic control valve according to the itinerary features can be divided into: straight stroke and stroke. Straight travel include: single-seat valve, two-seat valves, cylinder valve, cage valve, Angle valve, three-way valve, diaphragm valve; Quarter-turn include: butterfly valve, ball valve, eccentric rotary valve, fully functional ultralight pneumatic control valve. Pneumatic - valve drive mode can be divided into: according to the manual pneumatic control valve, pneumatic control valve of pneumatic and electric pneumatic control valve and hydraulic pneumatic control valve, namely to compressed air to power sources pneumatic pneumatic control valve, based on electric power sources of electric pneumatic regulator, as a liquid medium ( Such as oil, etc. ) Pressure as the power of electric hydraulic pneumatic control valve; By adjusting the form can be divided into: external regulation regulation, cut, cut type; According to the flow characteristic can be divided into: linear and logarithmic type ( The percentage) , parabola, quick opening.