Electric valve controller installation and adjustment! The difference between electric valve and pneumatic valve

Electric valve controller installation and adjustment! The difference between electric valve and pneumatic valve

Installation and adjustment of electric valve controller:

1. Install and fix it according to the selected model and specifications. The ground terminal on the back panel must be grounded reliably.

2. The circuit drawing number of the controller and the electric device is the same. Connect the controller and the electric device with the same terminal number by cable. When the electric valve controller is used in the automatic control system, terminals 12, 13 and 14 are used to automatically open and close the input terminals of corresponding signals.

3. Press the power button, and the power indicator will light up. The remote control switch on site will point to the remote control, and the remote control indicator will light up.

4, use the hand wheel to open the valve to 50% of the opening, press the open valve or close the valve key, check whether the rotation of the valve and press the key is consistent, such as inconsistent immediately press the rest key, cut off the three-phase power supply, replace any two phases of the three-phase power supply.

5. Press the open valve key, when the valve is fully opened in place, the open valve indicator on the front panel will light up; Press the close valve key, when the valve is fully closed in place, the close valve indicator on the front panel will light up; When the valve in the process of opening or closing need to rest, press the rest key, the valve rest. Short connect terminals 4 and 7, accident light on front panel.

6. When the valve is in the fully open position, adjust the potentiometer on the front panel to make the opening meter show 100%.

7, the site remote control switch points to the site, the site indicator light, short circuit terminals 12 and 13, the valve and open to run, for the point state; Short circuit No. 12 and No. 14 terminals, valve to close to run, for the point state.

8. Fuse 520, 1A on rear panel.

The difference between electric valve and pneumatic valve

The difference between electric valve and pneumatic valve:

1, the pneumatic valve action distance is larger than the electric valve, the pneumatic valve switch action speed can be adjusted, simple structure, easy to maintain, the process of action because of the buffer characteristics of the gas itself, not easy to be damaged by jamming, but must have the air source, and its control system is more complex than the electric valve. Pneumatic valve response is quick, safe and reliable, many factories with high control requirements are designed for pneumatic instrument control elements set up compressed air station. The power source of the pneumatic valve actuator is the air source, and the air source comes from the air compressor. The electronic control signal is converted into the pneumatic control signal by the positioner, and the pneumatic actuator is driven to adjust the valve position.

2, electric valve actuator power source for power supply, if the circuit board or motor fault easily spark, so generally used in the environment requirements are not high and there is no danger on the occasion of pneumatic actuator and electric actuator joint function comparison, pneumatic actuator response speed is faster, can be more suitable for application in regulating conditions, Therefore, the manufacturers of regulating valves all produce pneumatic actuators and supporting them.

3. The regulating response speed of the electric actuator is not fast enough, and the pneumatic actuator on the regulating valve is more than the electric actuator.

4, the essential difference between electric valve and pneumatic valve is the use of different driving devices, that is, the actuator, and the regulating valve itself is no difference. To cooperate with different actuators is mainly the requirements of working conditions, such as chemical industry and other explosion-proof occasions, the use of pneumatic valves, because of high safety requirements, and the price is cheap, with intelligent locator can be on the bus, the control mode is simple.