What causes oil to spray out from the silencer of a diaphragm pump?
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I would like to ask the experts here: An oil is spraying out from the silencer of a Graco DK331P diaphragm pump that we have on site. The fluid pumped by this pump is dirty oil, and it’s clearly the fluid inside the pump; however, both the pressure and flow rate at the site are normal. Could anyone help analyze what could be the cause of this? Thank you!
It’s certain that the diaphragm is leaking; perhaps the leakage from both diaphragms is minor, so it has little impact on pressure and flow
The oil suction volume through the oil tube in the oil cup at the air inlet of the valve control slide is too high; flatten the oil suction tube slightly to reduce the oil suction volume.
Thank you for your answer! We don’t have a constant pressure valve installed at the air inlet, nor do we have an oil reservoir.....
Thank you for your answer! I think the same...
Leakage of the conveyed medium occurs only when the diaphragm is damaged.
The diaphragm has leaked, but the hole isn’t large