High-pressure valves are also divided into electric valves, hydraulic valves and pneumatic valves. Electric valves are driven by corresponding electric devices, and hydraulic valves are equipped with hydraulic drives.Dynamic device, pneumatic valve equipped with pneumatic drive

Moving device, valve electric device is to achieve valve program control, automatic control and remote control indispensable driving equipment, the movement process can be controlled by the size of the stroke, torque or axial thrust.

3. A torque limiting mechanism to adjust the torque (or thrust) so that it does not exceed a predetermined value.

4. Manual and electric switching mechanism, interlocking mechanism for manual or electric operation.

5. The opening indicator is used to show the position of the valve during opening and closing.

Valve electric device is also known as electric actuator. It is a driving device that can provide linear or rotary motion. It uses a certain driving energy source and works under the action of a certain control signal.

electric actuator advantages and disadvantages:

Advantages: 1. Convenient access to energy, fast signal transmission speed, long transmission distance, easy centralized control, high sensitivity and precision, convenient coordination with electric adjustment instruments, and simple installation and wiring.

2. Compared with hydraulic and pneumatic products with the same function, the electric actuator is the most cost-effective. The electric actuator (electric push rod/electric cylinder) is cleaner, easier to operate and more electrically efficient, thus benefiting the user. The integrated design of the electric actuator is easier to program and control, and the maintenance workload is minimized. Except in extreme conditions, there is no need to replace lubricating parts.

Disadvantages: complex structure, small thrust, average failure rate is higher than that of pneumatic actuators, suitable for places where explosion-proof requirements are not high and gas sources are lacking.

Electric actuator main features:

1. Integrated structure design. Position transmitter and servo amplifier can be directly installed into the actuator as two independent components, directly receiving 4-20mA control signal and outputting 4-20mA or 1-5VDC valve position feedback signal. It has self-diagnosis function and is very convenient to use and adjust.

2. Functional modular structure design, through the combination of different optional functions, from simple to complex control, to meet different application requirements.

3. Simple structure, small size, light weight, easy to install and maintain, all mechanical parts are made by CNC machining, and the workmanship is exquisite.

4. The transmission adopts small backlash sealed gears, which has the characteristics of high efficiency, low noise, long life, stability and reliability, and no need to refuel.

With a variety of operating speeds, it can meet the requirements of various control systems to ensure the rapid response and stability of the system.

6. The PSL series is connected with the valve by flexible coil spring, which can avoid the influence of different shafts of the valve stem and the output shaft to the valve. The valve shutdown force can be preset to ensure the reliable shutdown of the valve and prevent leakage.

7. The drive motor is a high-speed synchronous motor made of high-performance rare earth magnetic materials, which runs smoothly. It has the characteristics of small size, large torque, anti-blocking and high control accuracy.

8. Segmental adjustment can be set, I .e. two actuators are controlled by the double time proportional signal output by one regulator (4-12mA corresponds to full opening and full closing of PSL1, and 12-20mA corresponds to full opening and full closing of PSL2).

9. The valve position feedback element adopts a fully sealed high-precision multi-turn potentiometer, which has the characteristics of small size, high precision, small dead zone and long service life.

10. Adjustable stroke, easy to connect with the valve.

11, all electrical components are world famous brand products, reliable quality, long service life.

12. The wiring of electrical components is rigorous and completely isolated from the transmission components, which improves the reliability of the operation of the actuator.

                                  

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