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How to maintain the vacuum pump

First of all, customers should check the oil level frequently, and adjust it to meet the requirements when it does not meet the requirements. When the vacuum pump is running, the oil level should be in the center of the oil mark. The quality of oil should be checked regularly, and new oil should be replaced in time to ensure the normal operation of vacuum pumps. The oil change period shall be determined by the user at his discretion, taking into account the actual conditions of use and whether the performance requirements can be met or not. Generally, when pumping clean and dry gas, it is recommended to change oil once in about 100 hours. When the black metal powder can not be seen in the oil, the oil exchange period can be extended appropriately in the future.


In general, the vacuum pump should be repaired after 2000 hours of work, check the aging degree of the gum seals, check whether the exhaust valve disc is cracked, and clean up the dirt deposited on the disc and the exhaust valve seat. Clean the parts in the whole vacuum pump, such as rotor, rotor, spring, etc. It is usually washed and dried with gasoline. Rubber parts can be cleaned and dried with a dry cloth. When cleaning and assembling, it should be gently handled and carefully bruised. If conditions permit, the pipeline should also be cleaned up to ensure that the pipeline is unblocked.


After reassembling the vacuum pump, it should be put into trial operation. Generally, it should run empty for 2 hours and change oil twice. Because there will be a certain amount of volatile substances in the vacuum pump during cleaning. When the vacuum pump is in normal operation, it should be put into normal work again, and the loosening of the vacuum pump pipeline and joint should be checked. Turn the vacuum pump by hand to see if it is flexible. Adding bearing lubricating oil to the bearing body, observing the oil level should be at the center line of the oil mark, and the lubricating oil should be replaced or supplemented in time.


Start using the gate valves and outlet pressure gauges of the outlet pipeline and the imported vacuum gauge, and point the motor to see if the motor steering is correct. Start the motor. When the vacuum pump is in normal operation, open the outlet pressure gauge and the import vacuum pump. After it shows the appropriate pressure, gradually open the gate valve and check the load of the motor. Control the flow and head of the vacuum pump as far as possible in the range indicated on the sign to ensure that the vacuum pump runs at the most efficient point, in order to achieve the greatest energy-saving effect. During the operation of the vacuum pump, the bearing temperature should not exceed the ambient temperature of 35C, and the maximum temperature should not exceed 80C. If abnormal sound of vacuum pump is found, stop immediately to check the cause.


To stop the use of vacuum pump, first close the gate valve, pressure gauge, and then stop the motor. During the first month of operation, the vacuum pump replaces the lubricating oil after 100 hours, and every 500 hours thereafter, the oil is changed once. Regularly adjust the packing cap to ensure that the drip leakage in the packing room is normal (drip leakage is appropriate). Periodically check the wear condition of the sleeve, and replace it in time after the wear is serious. When the vacuum pump is used in cold winter season, after stopping, it is necessary to unscrew the lower discharging bolt of the pump body to remove the medium. Prevent frost cracking. When the vacuum pump is out of service for a long time, it is necessary to dismantle all the pumps, dry the water, and coat the rotating parts and joints with grease for proper storage.

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Rotary vane vacuum pump

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