The difference between pneumatic control valves and electric control valves is that the performance characteristics of electric control valves are:

The electric regulating valve is composed of an electric actuator and a regulating valve, and its main characteristics are:

1. Lightweight and aesthetically pleasing in appearance.

2. Functionally, it can replace many products with incomplete functions, simplify the design, and solve the shortcomings of complex factory management, complex selection, and heavy maintenance workload.

3. The adjustable ratio of electric control valves is large, usually up to 100, and can have good adjustability from 10% to 90% of the opening.

4. Smooth operation and high reliability can solve the fatal structural defects of traditional valves with large leakage.

5. Excellent on-off characteristics, zero leakage, solving the fatal structural defect of traditional valves with large leakage.

6. Good ability to overcome pressure difference, anti blocking function, simple flow path, unobstructed adjustment, high KV value, and good self-cleaning performance.

7. The flow characteristic of the electric control valve is approximately equal percentage. However, due to the constant pressure difference between the front and back of the valve, the actual curve of traditional control valves will undergo significant distortion but also relatively small, resulting in not only good regulation performance, but also good economic and energy-saving performance.

8. Compared with pneumatic control valves, electric control valves use power sources that are both convenient and economical, saving a series of troubles in establishing gas source stations.

9. The electric adjustment mechanism has high accuracy, a decomposition degree of up to 1/1000, low operating cost, and no need for maintenance.

10. According to the actual usage environment, PTFE ceramic lined ball valves or fully lined ceramic hard sealed ball valves can be used to achieve higher corrosion and wear resistance performance.

2、 Performance characteristics of pneumatic control valves:

The pneumatic regulating valve is composed of a pneumatic actuator and a regulating valve, and its main characteristics are:

1. The extruded high-strength aluminum cylinder body, with its inner surface finely ground and hard anodized, has a long service life, low friction coefficient, and quick action.

2. The beautiful, compact, and modern design, as well as the multi specification series of products, make the selection more cost-effective.

3. All active surfaces are made of high-quality bearings with low friction, long lifespan, and no noise.

4. Two independent stroke adjustment mechanisms are installed externally to facilitate adjustment of the ± 5 ° fully open or fully closed position.

5. The piston and end cover are made of die-cast aluminum alloy, with high strength and light weight.

6. Changing the sealing element can be applied to high or low temperature situations.

7. Various angular stroke and three position pneumatic actuators can be provided as needed.

8. Simple control without the need for additional explosion-proof measures.

9. But its basic error and sensitivity are too low, which needs improvement.

From the above, it can be seen that the basic error rate and sensitivity of the electric control valve reach 0.3%, and there is no need to establish a separate air source, which is not suitable for situations with high explosion-proof requirements. The basic error and sensitivity of the pneumatic control valve reach 0.5%, and an additional gas source station needs to be established. Suitable for occasions with high explosion-proof requirements.