Pneumatic diaphragm pump
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One of the company’s pneumatic pumps stops operating automatically after running for a certain period of time; it resumes normal operation once the air inlet valve is switched on again, or after pressing the pushpin on the valve control mechanism. Or after replacing the diaphragm, it can also operate for a longer period of time. We have cleaned the valve train and lubricated it, but the problem still persists. I would like to ask the experts: what is the fault with this pump and how should it be repaired? Thank you!
Leaking seals inside the valve or insufficient air supply pressure can cause this phenomenon.
What is this pneumatic pump from your company used for? Are pneumatic diaphragm pumps useful for unloading tank trucks?
The valve is worn, the sealing ring is leaking, or there are leaks due to low air pressure. Replace the valve and check the air pressure.
Of course, there is methanol and propanol; pharmaceutical factories transfer these substances from tank trucks into underground storage tanks
The sealing ring is worn out; replace the sealing ring
Check the seal ring of the valve plunger; it is advisable to install an oil cup at the compressed air inlet, as oil lubrication helps prevent sticking
First, determine what type of fluid this pump is used to pump. If it operates in an industrial or mining environment, and the working conditions are clean, then it’s necessary to check whether the internal sealing components are worn and causing leaks, whether the valve elements are damaged, and whether there are any cracks in the internal structure that could lead to leaks. Each component should be inspected carefully