Regarding the failure of the isolation valve in the tank area to operate
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There is a shut-off valve in the tank area; it isn’t working at the moment. It has a handwheel. Is it automatic when fully open or when fully closed? How can I identify the problem? Can anyone help analyze this? Thank you
It depends on the condition and location of the accident
If it should be turned off at the time of an accident,
Automatic should be in the full open position. The reason for no action is first to determine whether the interlock has been triggered and whether the solenoid valve has lost power
The original poster’s question is very vague, with an unclear focus. Regarding the valve not operating, it is actually one of the faults that is relatively easiest to diagnose among all kinds of issues.
The valve does not operate; the troubleshooting process is as follows: Check the air supply. Check the power supply and the locator. Inspect the valve body and actuator, including the valve stem, etc. Check the condition of the medium. It varies slightly depending on different companies, different work sections, different media, different operating conditions, and different climate temperatures
The poster is asking whether it’s on in fault mode or off in fault mode? There will be corresponding markings on this valve.
It’s an emergency shut-off valve, right? It should be a valve that operates on air pressure; there might only be a solenoid valve on it. So first, check whether there is a problem with the solenoid valve. If the solenoid valve is fine, then check the valves and pipelines.
Pneumatic cut-off valves are generally divided into fail-open and fail-close valves. Fail-open valves are generally used in emergency pipelines, such as the shut-off valves in tank farm fire suppression systems; they are typically fail-open valves, meaning that in the event of a loss of gas or power, the valve opens automatically when in a remote control mode. The failure to close the valve is the opposite. To determine whether there is a problem with the valve body or the cylinder of the cut-off valve, a simple way is to place the control handle in the manual position and turn the handwheel to check whether the valve can open and close smoothly.
It’s related to the process, as well as settings and so on.