Which type of electric valve can return to its closed position automatically after a power outage?
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There is an electric valve on the gasoline pipeline at the oil depot. As you know, when power is suddenly cut off to a regular electric valve, it remains in the state it was in during the power outage and cannot return to its closed position. Are there any electric valves that can be used to close the valve urgently in the event of a power outage? Please let me know the brand, model, and price. Thank you all**.
Yes, there is; the one chosen for accident-related purposes is the so-called FC
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The fault shutdown mentioned on the 2nd floor probably doesn’t refer to a power outage; how can a valve be closed if there is no power supply?
It’s that type of solenoid valve: it operates with electricity and instrument air, functions as a shut-off valve, and has only two states – on or off – with no possibility to adjust the valve position.
There are a few points that need your confirmation: 1. Is your valve equipped with an electric actuator? 2. Does your control room have a UPS? 3. The wiring should be set up in ESD mode so that the valve can be closed in case of an emergency. Pneumatic single-acting actuators are the most reliable option, as they cause the valve to close under the action of a spring in the event of a power or air supply failure. In the case of an electric actuator, the UPS must be able to supply power for at least 30 minutes, and it is necessary to ensure that the wiring cables are not damaged; shutdown can also be achieved by connecting it in ESD mode.
Just select the valve that controls the shutdown in case of an accident. http://bbs.hcbbs.com/thread-1485160-1-1.html
I really haven’t seen any electric valves that can be shut off when the power is cut off. It’s sufficient to set the pneumatic control valves to shut off in an interlocked manner. Why do electric valves need to shut off when there’s no power? A normal electric valve is in a power-off state; it is powered only when in use
This post was last edited by shiwendong on 2016-10-7 00:10. Tank farm systems: Piston-type electro-hydraulic valves are recommended, as they ensure that the main valve closes in the event of a power loss. Oil depot systems are now commonly equipped with them; contact information is provided below
This post was last edited by vszxp on 2016-10-7 at 19:43. There are many options: as long as your actuator has a spring-return mechanism, it will work; or you can purchase valve bodies without actuators and buy an actuator separately. You can search on Baidu for spring-return electric actuators or actuators that return to their original position when power is cut off
1. Yes, it’s an electric actuator – a Korean ITORK actuator – but it doesn’t have a power-off reset function.
2. There is a UPS; it was there before, and UPS failures have occurred, resulting in the electric valve not being able to close when power is lost.
3. What does ESD wiring refer to? Without a pneumatic actuator, can an electric actuator achieve this function? I’ve searched a lot; the IQ series from Rotrok, as well as certain electric actuators from Siemens, seem to be capable of doing this, but there’s very little information available in China. Could you give examples of specific models?
2. There is a UPS; it was there before, and UPS failures have occurred, resulting in the electric valve not being able to close when power is lost.
3. What does ESD wiring refer to? Without a pneumatic actuator, can an electric actuator achieve this function? I’ve searched a lot; the IQ series from Rotrok, as well as certain electric actuators from Siemens, seem to be capable of doing this, but there’s very little information available in China. Could you give examples of specific models?