What is the function of a pneumatic control valve with a solenoid valve? Can a pneumatic control valve be used without a solenoid valve?
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What is the function of a pneumatic control valve with a solenoid valve? Can a pneumatic control valve be used without a solenoid valve? Are there also electric control valves that can be equipped with solenoid valves for emergency shutdown? If that’s not possible, what can be used to achieve an emergency shut-off for the electric control valve?
The solenoid valves in pneumatic control valves are generally related to the safety status. . For example, with the ESD system, can it be omitted? Of course, you don’t have to bring it. But it depends on the design requirements and safety requirements. There is no need to use solenoid valves in electric control valves; the solenoid valves we use are used to control gas or liquid circuits. Electric ones don’t need this.
Control valves generally do not come with solenoid valves. However, when the process requirements dictate that the control valve must return to a safe position in the event of an accident or under certain conditions, and it should not be actuated accidentally by the DCS, a solenoid valve should be installed. Also, when this control valve is used in safety interlocks, a solenoid valve needs to be added.
This post was last edited by hfrs on 2016-9-5 20:17. Done. To be able to ask such a question. Testing our IQ? You’re not working in the instrumentation field, are you?
It can be brought along; this allows the control valve to have a shut-off function
In fact, whether to include it or not usually depends on whether there is a time requirement for the valve to enter the fault state in the event of an accident or interlock condition. It is much faster to achieve full open or full closed of the control valve using a solenoid valve than using a positioner.
Sir, what is the principle behind installing an electromagnetic valve in an electric valve? A pneumatic valve is equipped with a solenoid valve to regulate the gas passage, right? For example, if the pneumatic valve is shut off and air is allowed to flow into the atmosphere, the pneumatic valve will shut off urgently. But what is the principle behind installing a solenoid valve in an electric valve? Looking forward to your advice!
Is the solenoid valve a certain number of positions and channels? So I understand it is used to regulate the channels; am I correct?
Is there a time requirement for the valve to reach the fault state? Sir, how should this sentence be understood?