The vacuum pump does not achieve sufficient negative pressure, and the current level is also above the limit
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This post was last edited by foam_ZPTK on 2018-4-27 23:13. The vacuum pump does not create a sufficient negative pressure, yet the current level remains above the normal range – what could be the reason?
The back pressure is too high. The normal back pressure for a vacuum pump should not exceed 50 kPa; or maybe there’s too much water in the water ring vacuum pump
The outlet pressure is around 20 kPa, which isn’t high, right?
We use oil-free vertical vacuum pumps
There is a leak in the system, causing the pump’s load to be too high and resulting in overcurrent. So the vacuum level cannot be achieved
Could it be due to high temperatures? Do high temperatures cause some changes in the components of the pump, and can the outlet temperature reach 100 degrees?
It is very likely due to an excessive gap at the rotor end face
For reciprocating pumps, check the valve plates; it’s harder to say the same for claw pumps
It depends on the type of vacuum pump you are using. Different pumps have different ultimate vacuum levels, and there is also a leakage rate when the pump itself is used for vacuum creation. If the system requires a high vacuum level and the pump itself is not capable of meeting this requirement, operating at its limit continuously will result in excessively high current levels; prolonged operation can even cause the motor to overheat and get damaged.