The difference between pneumatic control valves and electric control valves

Time:

2023-05-24

Source:

network

Author:

　　1、 Performance characteristics of electric control valves:

　　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 large maintenance workload.

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

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

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

　　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 characteristics of electric control valves are approximately equal percentages. The flow characteristics of actual work, due to the constant pressure difference before and after the valve, result in significant distortion in the actual curve of traditional control valves, which is also relatively small. Therefore, it not only has good regulating performance, but also has good economic and energy-saving properties.

　　8. Compared with pneumatic control valves, electric control valves use power conveniently and economically, saving a series of troubles in establishing gas source stations.

　　9. The electric adjustment mechanism has high precision, 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 resistance 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. Squeezed high-strength aluminum cylinder body, with fine grinding and hard anodizing treatment on the inner surface, has a long service life, low friction coefficient, and fast 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, which have low friction, long service life, and no noise.

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

　　5. The piston and end cap are made of die cast aluminum alloy, which has high strength and light weight.

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

　　7. Multiple angular strokes and three position pneumatic actuators can be provided as needed.

　　8. Simple control and intrinsic safety. No additional explosion-proof measures need to be taken.

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

　　As can be seen from the above, 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, but it is inherently safe. Suitable for occasions with high explosion-proof requirements.

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