Edward Vacuum Pump Maintenance Precautions

Leakage of oil

Edward Vacuum Pumps are experiencing oil leakage primarily at three locations: the oil window, the sealing kit, and the bearing shaft seal. The cause is due to the aging of the seals. Replacing the corresponding parts should resolve the issue. After the repair, remember to clean the oil tank and then refill it with Edward vacuum pump oil.

2. The vacuum level does not meet the required standard.

First, check the airtightness of the vacuum pump and verify for any leaks. Next, open the vacuum relief valve and let the vacuum pump operate for 30 minutes to exhaust the compressed steam inside, eliminating the impact of the compressed steam on the vacuum pump. If the above methods do not achieve the desired vacuum pressure, pay attention to the following: whether the vacuum pump oil is contaminated or sludge has formed, if the oil lines are clogged, if the filters are deformed, if the blades are worn, deformed, or if the exhaust valve is deformed. Conduct an inspection of the vacuum pump body, use a detection instrument to check for deformation or wear, and if wear is detected, replace the corresponding parts.

Regularly inspect the oil condition, and replace with fresh oil promptly upon discovering oil deterioration to ensure the vacuum pump operates normally.

4. Generally, vacuum pumps should be inspected after 2,000 hours of operation. Check the aging of the gasket seals, inspect for cracks in the exhaust valve blades, and clean debris accumulated on the valve blades and exhaust valve seats. Wash all components inside the vacuum pump cavity, such as rotors, vanes, springs, etc. Typically, gasoline is used for cleaning and then dried. For rubber parts, simply dry them with a cloth after cleaning. Handle parts gently during assembly to avoid damage.

5. Add bearing lubricating oil to the bearing housing, ensuring the oil level is at the centerline of the oil mark. The lubricating oil should be replaced or supplemented promptly.

6. Inspect the vacuum pump piping and joints for any signs of looseness. Roll the vacuum pump by hand to test its sensitivity.

7. After reassembly, a trial run should be conducted, typically requiring two hours of empty operation and two oil changes. This is due to the presence of a certain amount of volatile substances left in the vacuum pump during cleaning. Once the operation is normal, normal operations can then commence.

Start the motor. Once the vacuum pump is operating normally, open the outlet pressure gauge and the inlet vacuum pump, and check that the correct pressure is displayed. Then, gradually open the valve while monitoring the motor load.

9. Ensure the vacuum pump operates within the flow and head range specified on the label to maintain high-power operation and achieve better energy-saving effects.

When shutting down a vacuum pump, first close the valve and pressure gauge, then stop the motor.

During operation, the vacuum pump's bearing temperature must not exceed the ambient temperature by more than 35°C, and it must not exceed 80°C.

Vacuum pumps are to be lubricated every 100 hours during the first month of operation, and then every 500 hours thereafter.

Regularly adjust the packing gland to ensure normal dripping conditions within the packing chamber (preferably dripping in drops).

14. Regularly inspect the wear on the shaft sleeve; replace it promptly when excessive wear is detected.

15. For vacuum pumps that have been inactive for an extended period, disassemble the pump completely, dry all moisture, apply lubricant to the rolling parts and joints, reassemble properly, and store carefully.

16. When using a vacuum pump during the harsh winter, after parking, the water drain plug at the bottom of the pump body should be unscrewed to drain the medium completely.