Adjust the pneumatic valve with pneumatic actuator body type selection

to adjust the choice of the pneumatic valve actuator

in order to make the adjustment of pneumatic valve to work properly, with the implementation of the mechanism to produce enough output power to ensure high seal and pneumatic valve opens.

for double-acting pneumatic, hydraulic, electric actuators, are generally not reset spring. The size of the force has nothing to do with its direction, therefore, the selection of the actuator is the key to find out the biggest output force and rotational torque of the motor. For single acting pneumatic actuators, the output power is associated with the opening of pneumatic valve, pneumatic valve regulating on the emergence of the force will also affect the movement characteristics, so the requirement in the whole regulation of the pneumatic valve opening range force balance is established.

the actuator output force is determined, according to the process using the environment requirements, choose the corresponding actuator. For the scene have explosion-proof requirements, should choose pneumatic actuators. From the aspects of energy saving consideration, should try to choose electric actuators. If the adjustment of high precision, can choose hydraulic actuators. Such as power plants transparent machine speed regulation, the refinery catalytic unit reactor temperature regulation control and so on.

regulating pneumatic valve pneumatic valve body is a lot of more phyletic, the commonly used types of pneumatic valve body is through single-seat, pass-through two-seater, angular, diaphragm, small flow rate, tee, eccentric rotating, butterfly, sleeve, spherical, etc. In the concrete when the choice, should pay attention to the following:

, pneumatic valve core shape structure: mainly based on the selected flow characteristic and factors such as unbalanced force.

and wear resistance, when fluid medium is suspending liquid containing high concentrations of wear particles, the interior of the pneumatic valve material is hard.

and corrosion resistance: because of the corrosive medium, try to choose simple structure of pneumatic valve.

, medium temperature, pressure, when the medium temperature, high pressure and large, should choose pneumatic valve core and pneumatic valve seat materials by temperature, pressure changes small pneumatic valves.

and prevent flash and cavitation: flash and cavitation in liquid medium. In the process of practical production, flash and cavitation will form the vibration and noise, shorten the service life of pneumatic valves, should prevent when choosing pneumatic valve pneumatic control valve produce flash and cavitation.