Isolation valve testing
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Cut-off valve testing: I would like to ask everyone – the production staff want to conduct a test of the switch’s performance while the valve is under pressure. By using DCS to send interlock signals, or by manually turning off the air supply to the switch on site, are these two methods effective in the same way? Is there any difference in response time?
This test is not simply cutting off the origin. For a valve to operate, air pressure must push one side, while the other side needs to have its existing air pressure released in order to move. Most solenoid valve bodies have test switches. Both types of testing are required; the remote control test is essential, as it involves signal transmission when power is present and when it is not. It is recommended to take a look at the entire set of operating principles. For reference.
The DCS signal should be considered a remote test, while the cut-off of the gas supply signal is considered a fault operation test
Put it this way: the two types of testing have the same effect on process parameters. For valves, DCS testing can be used to determine whether the valve operates properly and whether the control circuit is functioning correctly ； On-site testing can only determine whether the valve body and cylinder are functioning properly.
It is limited to testing whether the valve can operate under pressure and whether the switching time meets the requirements. What about this situation?
Thank you, I’d like to ask another question. The purpose is solely to test whether the switching time of the valve under pressure meets the requirements. Is there a difference between the two methods in this situation?
No, to put it simply, it involves actions of power on and off, as well as actions that involve changing the direction of origin. It still depends on the specific valve style.