Electric Actuator DQ Series
Overview
DQW electric actuator are suitable for butterfly valves, ball valves, plug valves and other rotary valves and similar equipment. The product has compact structure, large starting torque, high control precision, complete functions, reliable performance and convenient installation and adjustment. DQ is superimposed (DZW type plus secondary reducer) / DQJ is an electric actuator with lever angular travel of bearings and dampers. It cooperates with the valve to form an electric valve for driving and controlling the opening and closing of the valve. The operator can control the valve over long distances in the control room or on site. This product is widely used in water supply and drainage, heating, power station, chemical, food, textile, paper, pharmaceutical, shipbuilding, steel, coal and other industrial sectors.
According to the use environment: DQW / DQJW is outdoor type, DQB / DQJB is explosion-proof type, DQZ / DQJZ is integral type, DQT / DQJT is integral adjustment type, DQBZ / DQJBZ is full explosion-proof type, DQBT / DQJBT explosion-proof overall adjustable type. Torque range: 100N.m - 165000N.m
DQ is superimposed (DZW type plus secondary reducer) / DQJ is an electric actuator with lever angular travel of bearings and dampers. It cooperates with the valve to form an electric valve for driving and controlling the opening and closing of the valve. The operator can control the valve over long distances in the control room or on site. This product is widely used in water supply and drainage, heating, power station, chemical, food, textile, paper, pharmaceutical, shipbuilding, steel, coal and other industrial sectors.
Structures
Working environment
1. Power supply: three-phase four-wire, 380V, 50Hz (special orders can be 415V, 660V, etc., frequency can be 60Hz)
2. Working environment: (If it is explosion-proof, please refer to the instructions of the first-level electric actuator)
2.1 Ambient temperature: -20C-60C.
2.2 Ambient relative humidity: ≤90% (at 25C)
2.3 The working environment does not contain corrosive, flammable, and explosive media;
2.4 Protection level IP55
3. Short-time work system, the time is 10 mins;
Adjustment
Since this actuator needs to be assembled with the valve, the stroke mechanism, torque mechanism and opening indicator mechanism of the electric actuator must be adjusted before operation after assembly. If the fully open and fully closed positions of the valve are controlled by the stroke mechanism, the torque mechanism does not need to be adjusted. If the fully closed position of the valve is controlled by the torque mechanism or the fully open and fully closed positions are controlled by mechanical limits, the torque mechanism must be readjusted.
1. If the fully open and fully closed positions of the valve are controlled by the stroke mechanism or the torque mechanism, the mechanical limit must be loosened before adjusting the stroke or torque.
2. If the fully open and fully closed positions of the valve are controlled by the mechanical limit and the torque mechanism sends a signal, the adjustment method is as follows: Manually operate the electric actuator to put the valve in the predetermined position; Adjust the corresponding mechanical limit so that it just hits the output shaft, and tighten the locking nut and cap nut of the striker pin; Adjust the torque mechanism and gradually increase the output torque value until the valve can be turned into place.
1. Gearbox worm (sector) worm gear pair
2. Opening pointer
3. Connecting screw
4. Control box
5. Travel control mechanism
6. Torque limiting mechanism
7. DZW electric actuator worm gear pair
8. Travel transmission bevel gear pair
9. Manual-to-electric clutch
10. Handwheel
11. Switching handle
12. A, B gear pair
13. Valve motor
14. DZW electric valve actuator
15. Coupling 16. Mechanical limit
17. Connecting plate
18. Gearbox
Installation and Adjustment
Installation
This electric valve actuator is adjusted to the fully closed state of the valve (i.e. the "closing direction mark" position) before leaving the factory, so the valve disc should be placed in the fully closed state before installing the valve, and then fixed with the corresponding screws after installation. After installation, it can be used without further adjustment. DQW part-turn electric valve actuator, since the output shaft of the electric actuator rotates 90°, the control box observation window and opening pointer should be facing up during installation. In addition, refer to the space dimensions shown in the electric actuator outline drawing, and leave enough space near the pipeline to facilitate installation, construction, maintenance and repair.
Adjustment
Adjustment steps for electric valve actuator:
a. Turn the switching handle to the manual position, and manually operate the valve to make it fully closed (i.e., the closing position mark).
b. Open the control box cover and adjust the closing adjustment shaft of the stroke control mechanism (counter). Before adjustment, press down the middle push rod and turn it 90 degrees to disengage the transmission gear. Rotate the adjustment shaft in closing direction indicated by the counter sign to make the cam in closing direction move to press the button of the control switch. You can hear a "click" sound, then loosen the push rod to make the transmission gear mesh well. Use the same method to adjust the stroke in opening direction.
c. Adjust the torque control mechanism cam in closing direction to the required torque value (refer to the torque curve diagram of the certificate, generally adjusted near the rated value). The opening direction is also adjusted in the same way.
d. The mechanical limit mechanism has been adjusted before the whole machine leaves the factory, and the user does not need to adjust it during normal use. If the user needs to adjust the mechanical limit, the following steps should be followed: first, unscrew the sealing screw and the locking screw, and adjust the limit screw outward appropriately. Secondly, manually make the final control element fully closed. At this time, the opening pointer of the gearbox should be aligned with the "closing mark" position (if the opening pointer is not aligned with the "closing direction mark" position at this time, the power supply should be disconnected, the electric actuator should be disconnected from the valve, and the spline position between the output shaft sleeve and the worm gear of the gearbox should be adjusted to ensure that when the final control element is in the fully closed state, the opening pointer of the gearbox should be aligned with the "closing direction mark" position), adjust the limit screw until it cannot be screwed in, then turn the limit screw outward 2 turns, tighten the locking screw, and finally screw on the sealing screw. Use the same method to adjust the opening mechanical limit.
Applications
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