Through the above test, if the vacuum pump has no other faults, whether its limit vacuum degree has indeed become lower, can be better confirmed by measuring with a compression type vacuum gauge. Usually after long-term operation of the pump as long as the value below the label, it should be repaired. First of all, check whether the oil quantity is lower than the center of the oil gauge, whether the oil has deteriorated and whether the oil circuit is open. If there is a problem in this respect, you can add oil or change the oil properly.
If the vacuum still can not go up, you can adjust the oil valve of each axle or exhaust valve, increase or decrease the oil quantity and dredge the oil way. If there is no effect or the vacuum degree changes little, the sealing inspection can be carried out. If the vacuum gauge needle suddenly changes after pouring the sealing part with cleaner vacuum pump oil, it indicates that there may be a leakage at the dripping place. It is a relatively simple method to use shellac paint (commonly known as foreign thousand paint) as auxiliary sealant. At this time, as long as the brush dipped with shellac lacquer is used to brush the suspicious parts, if the vacuum suddenly rises, the loophole has been blocked, and it can be brushed several times to ensure that it is blocked. Of course, it's better to replace the sealing gasket at the leakage. After the replacement, the vacuum degree will go up.
CL Sereis Cone Liquid Ring Vacuum Pump
Roots Blowers
Roots Vacuum Pump
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