Once the hydraulic unloading valve cylinder is opened, the valve stem moves forward by about ten centimeters
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A discharge valve for a drying tank, hydraulically driven. After the valve is opened to the proper position, release the button; the valve stem moves forward slowly for about ten centimeters before stopping. The three-way four-position valve, hydraulic check valve, accumulator, filter, and other components of the hydraulic system were all found to be in good condition. This phenomenon occurred only after replacing the cylinder; when the old cylinder was connected to the system, the same issue appeared. The after-sales technical engineers from Jueneng Company were also unable to explain why this happens. I turn to all you experienced users for help – I’m extremely grateful
1. Check the pressure of the accumulator; 2. Drain all air from the hydraulic system
Is this valve for on/off operation or regulation? If it operates as a switch, there should be buffer adjustment screws at both ends of the cylinder. It can be resolved by adjusting the screw.
Those without adjustment screws use proximity switches to control the stroke and throttle valves to control the speed
It’s an open system, so no gas will remain. The accumulator inspection is normal
When operating, release the button and check whether the solenoid valve is powered on and off in a timely manner. It’s best to use a flowchart. The information is incomplete now. For common on-site failures, the manufacturer has manufacturing experience but no maintenance experience.
It has a limit after being turned off, with the accumulator maintaining pressure. After it is opened, once the proximity switch detects the correct position, the three-way four-position valve switches to the middle position
Go to the flowchart. It’s hard to explain hydraulic equipment in words
I have come across this type of pneumatic discharge valve before, but I have never encountered this kind of fault; I look forward to getting an answer
Open it; it’s not supposed to be closed. It’s normal for it to be closed