Flameproof electric head DZB120 flameproof grade BT4;
Multi turn valve electric device, known as Z, is suitable for the linear motion of the valve valve for the valve, cut-off valve, throttle valve, diaphragm valve, derivative products can be applied to the ball valve, butterfly valve, and the throttle, used to control the opening and closing of the valve or regulator, it can accurately according to the the control commands, the valve is to achieve remote control, centralized control and automatic control of the essential drive device. Yangzhou Yangxiu Power Equipment Co., Ltd. produces electric actuator, which has all functions, reliable performance and advanced control system. It is widely used in power, metallurgy, petroleum, chemical industry, papermaking, sewage treatment and other sectors.
The main types are:
DZW10-WK, DZW20-WK, DZW30-WK, DZW45-WK, DZW60-WK, DZW90-WK, DZW120-WK, DZW180-WK, DZW250-WK, DZW350-WK, DZW500-WK,
DZZ10-18W, DZZ20-18W, DZZ30-18W, DZZ45-18W, DZZ60-18W, DZZ90-18W, DZZ120-18W, DZZ180-18W, DZZ250-18, DZZ350-18W, DZZ500-18W,
Working environment and main technical parameters
Power supply: conventional, three phase 380V (50Hz)
Special, three phase 660V, 440V, 415V (50Hz, 60Hz);
Single phase 220V, 110V (50Hz, 60Hz)
Ambient temperature: -20~+60 C (special order -40~+80 C).
Relative humidity: less than or equal to 95% (25 C).
Outdoor type: places for non flammable, explosive and non corrosive medium;
Explosion proof grade of flameproof type: EXdIIBT4 is suitable for explosive gas mixture of IIA and IIB class T1-T4.
Protection grade: IP65 (special order IP67, IP68)
Working mode: the regulation type is S5, the load duration is 10%, and the number of work is 630c/h.
The switch type is S2, 10min.
The DZW multi rotary valve electric device has the properties of dustproof, waterproof and anticorrosion.
Adjustment of 1.1 switching and regulating electric devices
Adjustment of 1.2 moment control mechanism, stroke control mechanism and opening indicator
Open the electrical box cover, loosen the fixing screws on the electrical mounting plate (see Figure 10), turn the electrical installation board to 90 degrees, then adjust the torque control mechanism, the travel control mechanism and the opening indicator mechanism. The methods of adjustment are 7.1, 7.2 and 7.3.
1.3 local / remote operation
Switching and regulating electric actuators have state selection knobs, which provide two ways of field control and remote control for users.
Field control: dial the state knob to the site and show the spot sign on the panel. At this time, the operating mechanism can be controlled by opening and closing the operation knob through the panel.
Remote control: dial the state knob to the remote position, and display the remote flag on the display panel. At this time, the actuator is controlled by a remote switch or an analog signal.
1.4 parameter setting
1. The operation of the knob
The red knob is the mode button and can be switched on the spot / stop / remote. The black knob is the operation button, which can be opened or closed in the field mode. When the field knob is operated, it acts as a moving mode for a short time. When the operation button is effective for more than 3 seconds, the lower right corner of the display shows that BC enters the scene maintenance mode automatically, reversing the operation button or turning the way button to stop.
2. The operation description of the remote control (the remote control is for the selection of parts and special instructions when the order is required).
Open -- the field open key
Close -- field close key
Stop - field stop key
In the field, press the "Open" key to keep the valve open, and press the "Close" key to keep the valve and press the "Stop" key.
One key calibration condition of 3. valve position
1. ensure that the electric actuator is closed clockwise.
2. adjust the opening position of the limit switch and the torque switch.
3. adjust the rotation interval of the potentiometer or the absolute value encoder.
4. valve position one key calibration
The spot position, hold the open key or the switch key for about 3 seconds to light the light, then release the button to enter the one key calibration state.
The actuator turns on the limit switch to the closing direction, the red light and the letter L flash two, the output feedback the low end, then the actuator automatically opens the direction action to open the limit switch, the green light and the letter H flash two, the output feedback high-end, displays 100%, the calibration completes the automatic exiting.
Note 1: no release of the button when the light is lighted is unable to enter the one key calibration state.
Note 2:LCD the two indicator lights on the liquid crystal and the button corresponding to the key are in the same state.
5. dead zone settings (this function is only applicable to modulating type)
The dead zone is self - adjusted, no need to set up, and the precision is higher and no oscillation.
Switch type: control system and electric actuator are integrated into one. It is called switch electric actuator. Its electrical part is mainly composed of switch module, knob assembly, opening meter (or digital indicator), contactor and so on, as shown in Figure 10. The electrical components are mounted on a flip sheet to adjust the torque control mechanism, the stroke control mechanism, and the opening indicator. There are two knobs on the knob device, one is the state knob (the right side), the other is the operation knob (left side), depending on the electric housing, the arrow indicates the operation mode, the operation knob clockwise swirling to the arrow is the opening valve, and the counterclockwise is the closing valve.
Regulation type: the regulating system is introduced on the basis of switch mode, that is, the regulating electric device is formed. Its electrical part is composed of adjusting module, knob assembly, opening meter (or digital indicator), contactor and so on. 4~20mA standard signal can be received and output