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What should you watch out for when using a large circulating water vacuum pump?

Technical Knowledge 2019-05-08 11:47:48
Large circulating water vacuum pumps are used in many industrial sectors such as petroleum, chemical, machinery, light industry, medicine and food. Circulating water vacuum pumps are widely used in many processes of industrial production, such as vacuum filtration, vacuum water diversion, vacuum feeding, vacuum evaporation, vacuum concentration, vacuum regain and vacuum degassing. The use of large circulating water vacuum pumps should not neglect some details. Pay attention to the following when using:

1. If you find that the vacuum pump has abnormal sound, stop it immediately and check the cause.

2. When the vacuum pump is to be stopped, first close the gate valve and pressure gauge, then stop the motor.

3. The vacuum pump will change the lubricating oil after 100 hours in the first month of operation, and then change the oil once every 500 hours.

4. Regularly adjust the packing gland to ensure that the drip in the packing chamber is normal (it is better to make a drip leak).

5. Regularly check the wear of the bushings and replace them in time after the wear is large.

6. When the vacuum pump is used in the cold winter season, after parking, the water plug of the lower part of the pump body should be unscrewed to release the medium. Prevent freezing cracks.

7. The vacuum pump is to be deactivated for a long time. It is necessary to disassemble the pump completely, wipe off the moisture, and apply the grease to the rotating parts and joints, and keep them in a safe place.

8. Always check the position of the oil level. If it does not meet the requirements, it must be adjusted to meet the requirements. When operating with a vacuum pump, the oil level is at the center of the oil standard.

9. Check the oil quality frequently and find that the oil should be replaced in time to ensure that the vacuum pump works normally.

10. The oil change period is considered according to the actual use conditions and whether the performance requirements can be met, at the discretion of the user. Generally, when the new vacuum pump is used to remove clean and dry gas, it is recommended to change the oil once every 100 hours. After the black metal powder is not visible in the oil, the oil change period can be extended in the future.

11. Under normal circumstances, the vacuum pump should be inspected after 2000 hours of operation, check the aging degree of the rubber seal, check whether the exhaust valve piece is cracked, and clean the dirt deposited on the valve piece and the exhaust valve seat. Clean the parts of the entire vacuum pump chamber, such as rotors, rotary vanes, springs, etc. Usually cleaned with gasoline and dried. After cleaning the rubber parts, dry them with a dry cloth. Care should be taken when cleaning and assembling.

12. Conditionally clean the tube to ensure that the pipeline is unblocked.

13. After re-assembly, test run should be carried out. Generally, it must be operated for 2 hours and oil change twice. Because there is a certain amount of volatile matter in the vacuum pump during cleaning, it will be put into normal work after the operation is normal.

14. Check the vacuum pump piping and joints for looseness. Turn the vacuum pump by hand to see if the vacuum pump is flexible.

15. Add bearing lubrication oil to the bearing body. Observe that the oil level should be at the center line of the oil mark. The lubricating oil should be replaced or replenished in time.

16. Unscrew the water plug screw of the pump body of the vacuum pump and pour the water (or the slurry).

17. Close the gate valve and outlet pressure gauge of the outlet pipe and the inlet vacuum gauge.

18. Jog the motor and see if the motor is turning correctly.

19. Start the motor. When the vacuum pump is running normally, open the outlet pressure gauge and the inlet vacuum pump. After displaying the appropriate pressure, gradually open the gate valve and check the motor load.

20. Try to control the flow and lift of the circulating water vacuum pump within the range indicated on the label to ensure that the vacuum pump operates at the highest efficiency point to obtain the maximum energy saving effect.

21. During the operation of the vacuum pump, the bearing temperature must not exceed the ambient temperature of 35C, and the maximum temperature must not exceed 80C.

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