The dual-coil solenoid valve cannot open properly with a 6 kg air supply, but it opens normally with a 4 kg air supply
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As the title suggests, with a gas supply pressure of 0.6 MPa, the valve fails to open properly; it releases air as soon as it is actuated, suggesting that the gas is going through a bypass route rather than reaching the cylinder. Trying to lower the air supply pressure to 0.4 MPa allowed it to open properly. The valve closes properly. Analysis: The cylinder should not have any air leaks (otherwise, it wouldn’t shut off properly either). The seal ring of the spool in the solenoid valve body should be in good condition (no leakage at 0.4 pressure, but leakage at 0.6 pressure? It doesn’t make sense). The seal ring of the pilot system should also be fine (the entire set of pilot valve components was replaced, but the problem persisted after a couple of strokes). Suspecting insufficient suction force of the solenoid coil? (A low-power 1.8W coil is used.) Experts or brothers who have encountered similar situations could offer some advice. Thank you first! ! !
It is recommended to check whether the operating conditions of your solenoid valve are within the specified range. Also check whether the valve seat gasket has been damaged by blowing. For such issues, it is necessary to determine whether they are problems inherent in the equipment from the start or issues that arise later on. For problems that arise later on, it’s best to replace everything at once and try again. If it is congenital, then issues related to design selection need to be studied.
Is the air pressure too high? However, the operating pressure of this valve is within 1 MPa. The operating voltage was also checked under a load of 22.8V DC; the data showed that an operating voltage of 85% of the nominal value, namely 20.4V DC, was sufficient.
The operating conditions, including voltage, air pressure, and air source cleanliness, are all within the specified range. The manufacturer’s after-sales inspection showed that the sealing ring inside the valve was in good condition; meanwhile, the entire pilot valve core and its seals were replaced. Yet the problem persisted after two or three attempts at fixing it, and replacing the entire solenoid valve also did not resolve the issue fundamentally. Currently, it is planned to replace the coils with higher power consumption in order to determine the impact of the holding force. And confirm again whether there is internal air leakage in the cylinder.
This post was last edited by CHANGBAISHI on 2019-3-20 09:47. Try changing the brand, or give it a cleaning; check whether there is a problem with the \"trinity\" system for supplying air to the solenoid valve (i.e., filtering, pressure reduction, and oiling). Such as clogged filters, issues with pressure relief valves, and problems with the amount of oil injected.
That’s impossible; 6 kilograms of air pressure is within the normal range. It shouldn’t be a problem with the solenoid valve
The issue is still under analysis, so specific model numbers cannot be provided for now. It would be awkward if the problem isn’t related to the solenoid valve itself, right?