Vacuum oil filter start and stop steps

Vacuum oil filter start and stop operation steps (standard process)

The correct start and stop operation of the vacuum oil filter directly affects the oil purification effect and equipment life. The following is a standardized operation process, which is suitable for the treatment of industrial oils such as transformer oil and lubricating oil.

Preparation before starting

1. Check the oil source and power supply

- Confirm that the oil to be treated matches the oil filter model (such as transformer oil, hydraulic oil, etc.).

- Check whether the power supply voltage (380V/50Hz) and grounding are normal.

2. Equipment inspection

- Vacuum pump oil: Observe the oil window; the oil level should be within the marked range (if insufficient, add special vacuum pump oil).

- Filter element: Confirm that the filter element has been installed and is not damaged (coarse filtration + fine filtration).

- Pipeline connection: The oil inlet pipe, oil outlet pipe, and drain valve are sealed without leakage.

3. Environmental safety

- Ensure that the working area is well ventilated and away from open flames (oil vapor is flammable).

- Check whether the emergency stop button can be triggered normally.

Startup steps

1. Turn on the auxiliary system

- Open the cooling water valve (if the equipment is equipped with a water cooling system).

- Start the condenser (some models need to be turned on in advance).

2. Start the vacuum pump

- Press the vacuum pump start button and observe the vacuum gauge pointer rise.

- Target vacuum degree:

- Ordinary oil: ≤-0.095MPa (absolute pressure below 5kPa).

- High-requirement oil (such as transformer oil): ≤-0.099MPa (below 1kPa).

3. Turn on the heating system

- Gradually heat: Set the thermostat to 50-65℃ (strictly prohibited from exceeding 70℃).

- Note: Heating must be performed after the vacuum is stable to avoid local overheating.

4. Start the oil inlet pump

- Open the oil inlet valve and start the oil pump.

- Adjust the flow rate to the rated value of the equipment (such as 2000L/h).

5. Monitor operating parameters

- Vacuum: Keep stable (fluctuation range ±0.005MPa).

- Oil temperature: Control at 60±5℃ (transformer oil recommended ≤65℃).

- Filter element pressure difference: When it exceeds 0.3MPa, the filter element needs to be replaced after shutdown.

Normal operation and maintenance

1. Regular drainage:

- Check the condensate collector every hour, drain manually or automatically.

2. Observe oil quality:

- Take samples to test moisture (≤10ppm) and breakdown voltage (≥60kV).

3. Record data:

- Fill in the operation log (vacuum, temperature, flow, abnormal conditions).

Shutdown steps

1. Stop the oil inlet

- Close the oil inlet valve → stop the oil pump.

2. Turn off the heater

- Turn off the heating 30 minutes in advance and use the residual heat to evaporate the residual moisture.

3. Stop the vacuum pump

- After confirming that there is no oil in the vacuum tank, stop the vacuum pump.

- Key steps: open the vacuum valve first (to prevent pump oil from being sucked back).

4. Drain the equipment

- Open the drain valve to drain the residual oil and condensed water.

- Clean the filter element and oil circuit (flush with new oil when shutting down for a long time).

5. Turn off the power

- Disconnect the main power supply and hang the "Stopped" sign.

Safety precautions

1. Dry burning is strictly prohibited: the heater must be started after the oil circulation.

2. Explosion-proof operation: Explosion-proof equipment must be used when handling flammable oil products.

3. Emergency shutdown:

- In case of abnormality (oil spraying, abnormal sound, smoke), immediately press the emergency stop button → cut off the power → contact maintenance.

Common Problems

| Fault Phenomenon | Possible Causes | Solutions |

|--------------------|-----------------------|----------------------------------|

| Insufficient vacuum | Seal leakage/pump oil contamination | Check pipeline seal, ｒｅｐｌａｃｅ vacuum pump oil |

| Oil temperature is too high | Thermostat failure/insufficient flow | Calibrate thermostat, increase oil flow |

| Filter element frequently clogged | Oil product is seriously contaminated | Add pre-coarse filtration, reduce single processing volume |

Strictly following this process can ensure oil purification efficiency (water content ≤ 5ppm, cleanliness NAS 6 level) and extend equipment life.