Selection issues for electric control valves
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In the chemical industry, pneumatic control valves are generally preferred, while electric control valves are used to a lesser extent. Let’s discuss together the considerations for selecting and using electric control valves in the chemical industry.
1. The failure rate of electric control valves is higher than that of pneumatic control valves. 2. If explosion protection is required in the installation site for electric control valves, their price is also higher. 3. The response time of electric control valves is slower than that of pneumatic control valves. 4. In the event of a gas supply failure, pneumatic control valves can be set to either on or off mode, whereas electric control valves cannot do this. 5. Electric control valves are larger in size compared to pneumatic control valves; using pneumatic control valves helps save space! These are the reasons why electric control valves are less commonly used in the chemical industry. These are just my personal opinions for reference only! QQ: 928976489 (Your control valve consultant)
What was said on the second floor is completely correct: electric control valves are suitable for applications where the medium is stable and of a single type. Therefore, they are widely used in power-related applications. High and low pressure bypasses for steam turbines, electric butterfly valves for exhaust gas, and high-pressure electric gate valves for steam turbine main pipes all fall under the category of electric control valves. 3# shlapar
I also have a question: for the two valves/programmable valves, is it better to use electric ones or pneumatic ones?
For two-valve/programmable valves, it is better to choose pneumatic types, as they offer fast response and simple control.