What are the main reasons why multiple self-regulating valves fail to open or can only open slightly during the process of driving to pick up gas?
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What are the main reasons why multiple self-regulating valves fail to open or can only open slightly during the process of driving to pick up gas? (All adjustments are normal when parking.)
It might be that the air supply pressure is not sufficient.
It is most likely a problem with the actuator, or the process medium may be dirty and clogged; insufficient air pressure could also be the cause.
It could be a problem with the air supply pressure!
The actuator does not have sufficient thrust; it is due to an incorrect selection
What are the main reasons why multiple self-regulating valves fail to open or can only open slightly during the process of driving to pick up gas? (Adjustments are normal when the machine is parked.) The insufficient air pressure is usually caused by rust and debris in the gas, as well as water blocking the air supply pipes, or even blocking the capillaries of the pneumatic amplifier.
We have encountered this problem while driving as well; after checking, it turned out that the issue was insufficient air pressure, which prevented it from working. I hope this can help you.
Possible cause: Insufficient air supply pressure； The amplifier is damaged or clogged ； The valve seat is aged or the medium is blocked, preventing it from opening fully. Solution: 1. Check the air supply pressure. 2. Check the amplifier. If there are no issues with these two aspects, then it is likely that the valve seat has been corroded, aged, or clogged; repair or replacement is recommended.
The most likely reason is that the air supply pressure is insufficient
Although I don’t know much about on-site instruments and such, I think the problem is likely insufficient gas supply pressure first； In our facility, there is an electric valve in the fire protection piping system that presents a similar issue: when the cooling water pump is not running, the electric valve can open properly. However, once the pump starts operating, pressure builds up in the piping system, and the valve can only be opened to 17% of its full opening degree!
It has nothing to do with the air source pressure, as everything functions normally during shutdown adjustments. It’s because the actuator chosen is too small, resulting in insufficient thrust