Pneumatic valve manufacturer analysis of the use of pneumatic valve actuator and valve installation accuracy is closely related
The installation accuracy of pneumatic actuator and valve is correct, which directly affects the safe operation and service life of the actuator. Reasonable installation is the central shaft of the actuator and the valve stem absolutely coaxial, reasonable connection installation.
Before installing the actuator and valve, the valve torque to pass the required torque should be measured. After assembly, test the pneumatic actuator and valve at the same time, press the valve to the rated sealing pressure,
The air source pressure of the actuator is 0.4 ~ 0.7mpa or according to the air source pressure required by the user, switch the two air intakes of the pneumatic actuator and observe the switch of the pneumatic valve.
Do not stop, crawling phenomenon, switch should be flexible rotation, should be repeated test.
Pneumatic actuator: Pneumatic actuator is mainly divided into single function and double function, single function for the spring return structure, double function for the pneumatic switch principle, type adjustment generally choose double function pneumatic actuator.
Manual actuator: Manual actuator is to improve the current instability and air pressure when the manual control. When air pressure and current cannot be controlled or installed and maintained under special circumstances,
Open the manual feedback device for quick manual control. Automatically detects the phase sequence of the three-phase power supply connected to the power supply terminal by proper logic operation.
To ensure that the motor is connected to the correct phase sequence, decide which AC contactor to excite during actuator operation. The valve may be damaged due to the wrong phase sequence.
Because of the automatic phase sequence adjustment function, the connection of the actuator power supply cannot consider the phase sequence.
