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Advantages and disadvantages of pneumatic control valve and electric control valve

  Release time: 2021-01-25   

The first difference between pneumatic control valve and electric control valve is the performance characteristics of electric control valve
 
   electric control valve is composed of electric actuator and control valve
 
Light weight and beautiful appearance.
 
   2. It can replace many products with incomplete functions, simplify the modeling, and solve the shortcomings of complex factory management, complex model selection and heavy maintenance workload.
 
   3. The adjustable ratio of the electric control valve is large, generally up to 100, and it has good adjustability from 10% to 90% of the opening.
 
   4. The action is stable, which can solve the fatal structural defect of traditional valve with large leakage.
 
   5, excellent on-off characteristics, zero leakage, solve the fatal structural defects of traditional valve leakage.
 
Good ability to overcome pressure difference, anti blocking function, the simplest flow path, no resistance adjustment, large Kv value, good "self-cleaning" performance.
 
   7. The flow characteristics of the electric control valve are approximately equal percentage. Because of the pressure difference between the front and back of the valve, the actual curve of the traditional control valve will be greatly distorted, but it is also relatively small. Therefore, it not only has good regulation performance, but also has good economy and energy saving.
 
8. Compared with the pneumatic control valve, the power supply for the electric control valve is convenient and economical, which saves a series of troubles in establishing the gas source station.
 
   9. The electric regulating mechanism has high precision, resolution up to 1 / 1000, low operation cost and no maintenance.
 
   10. According to the actual use environment, PTFE lined ceramic ball valve or full lined ceramic hard seal ball valve can be used to obtain higher corrosion resistance and wear resistance.
 
Performance characteristics of pneumatic control valve:
 
   pneumatic control valve is composed of pneumatic actuator and control valve
 
   1. The extruded high-strength aluminum cylinder block has long service life, low friction coefficient and quick action after fine grinding and hard anodizing treatment on its inner surface.
 
   2. Beautiful, compact, modern shape, multi specification series products make the selection more economical.
 
   3. High quality bearings are selected for all moving surfaces, with low friction, long service life and no noise.
 
   4. Two independent stroke adjustment mechanisms are installed externally to facilitate the adjustment of ± 5 ° full open or full close position.
 
   5. The piston and end cover are made of die-casting aluminum alloy with high strength and light weight.
 
   6. Change the seal, can be used in high or low temperature occasions.
 
   7. A variety of angular stroke and three position pneumatic actuators can be provided on demand.
 
   8. Simple control and intrinsic safety. No additional explosion-proof measures are needed.
 
   9, but its basic error and sensitivity are too low to be improved.
 
   it can be seen from the above that the basic error and sensitivity of the electric control valve can reach 0.3%, so it is not necessary to establish another air source, and it is not suitable for the occasions with too high explosion-proof requirements. The basic error and sensitivity of pneumatic control valve can reach 0.5%, and the gas source station should be set up, but it is intrinsically safe. It is suitable for the occasions with high explosion-proof requirements.