1. Check the vacuum pump pipe and joints with loose phenomenon. Rotate the vacuum pump by hand to see if the vacuum pump is flexible. 2. Add bearing lubricating oil to the bearing body, observe the oil level should be at the center line of the oil, the lubricating oil should be replaced or replenished promptly. 3. Unscrew the diversion plug of the vacuum pump, pouring water or slurrying. 4. Close the outlet valve and outlet pressure gauge and import vacuum gauge. 5. Jog the motor to see if the motor is turning correctly. 6. Start the motor, when the vacuum pump is running, open the outlet pressure gauge and the inlet vacuum pump, as it shows the appropriate pressure, and gradually open the gate valve, while checking the motor load conditions. 7. Try to control the vacuum pump flow and lift the range indicated on the sign to ensure that the vacuum pump at the highest efficiency point of operation, in order to get the maximum energy-saving effect. 8. Vacuum pump in operation, the bearing temperature can not exceed the ambient temperature 35 ℃, the maximum temperature shall not exceed 80 ℃. 9. If the vacuum pump is found abnormal sound should stop immediately check the reasons. 10. To stop using the vacuum pump, close the gate valve, pressure gauge, and then stop the motor. 11. Vacuum pump in the first month of work, after 100 hours to replace the oil, after every 500 hours, oil change time. 12. Regularly adjust the packing gland, to ensure that the drip chamber filler normally drip out into the room as appropriate. 13. Check the wear and tear of the shaft sleeve regularly, should be promptly replaced after larger wear. 14. Vacuum pump in winter season, after parking, you need to unscrew the lower part of the drain plug to drain the media to the net. Prevent cracking. 15. Long-term deactivation of the vacuum pump, the pump required to open all, dry the water, the rotating parts and joints coated with grease installed, safekeeping.