Seeking help with issues regarding the programmable valves in hydrogen production PSA systems
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Our company is an oil refining enterprise, and we have a project for hydrogen production that involves PSA programmable control valves. Some of these valves trigger alarms frequently, and the alarm duration is very short. We have already cleaned the sensors and ensured that there is no water in the air supply lines; we’re not sure what could be causing this issue. Could it be a problem with the quality of the sensors or some kind of blockage? We would appreciate it if experts in this field could provide some insights
The Huixun is a sensor switch, I guess – it’s too far away, water seeping in, or the plug isn’t secure
I think it’s also due to delayed valve operation. Please observe on site to identify the cause
Go to the site to check the actuation time of the valve; if there are no issues with its operation, add some delay time – this is a problem that often occurs with larger valves. For the new system, it is necessary to consider the solenoid valves and the diameter of the air pipes. Sometimes, if the pore sizes of the solenoid valves and air supply pipes chosen are too small, this leads to high air resistance, resulting in slower valve operation
See how the program handles it; generally, a delay is used, for example, the valve is opened for 2 seconds to check for any feedback. If there is only one feedback switch. There is almost no problem in applying a 2-second delay to a DN250 valve.
The response to alarms seems to have little to do with the operation of the programmable valve; if the programmable valve is functioning properly, then the issue lies mainly with the response switch, and a progressive switch can be used
I don’t understand what you mean by an alarm – is it an alarm that triggers when the valve is opened or when it is closed? Our programmable valve outputs a signal for valve inspection, as well as unrelated signals. Valve inspection is optical detection. Very accurate.
Our programmable valve features a contactless probe, and an alarm is triggered after 4 seconds, as set within the valve’s operation timing. The response actually depends mainly on whether the valve moves properly and at the right speed. You can determine for yourself whether the alarm is caused by a slow movement or incomplete operation of the valve, or if there is a problem with the installation of the response mechanism, and then take action accordingly