Using and Maintaining Oil-Free Vacuum Pump

Oil-free diaphragm vacuum pump has the advantages of simple structure, good durability, easy operation, convenient maintenance, and no environmental pollution. It is a vacuum pumping, compressing, and dual-purpose vacuum pump. It is basic equipment for obtaining a vacuum with a very wide range of applications. Compared with the oil pump, the oil-free vacuum pump has a low degree of vacuum and a small amount of air, but it is small in size, easy to install, simple to maintain, easy to move, does not generate oil fume, and does not pollute the environment, especially in laboratories with high requirements.

Therefore, the diaphragm vacuum pumps manufacturer advises, when selecting an oil-free vacuum pump, you must first determine the vacuum degree required for work. If the required degree of authenticity is high, and the selected vacuum pump must be higher than the required vacuum degree, otherwise the vacuum pumping requirements will not be met, and the working requirements will not be met. The second is the pumping rate of the oil-free vacuum pump, which should be slightly larger than the required pumping rate during model selection so that it can better meet the needs. Lastly, we need to check whether the extracted gas is corrosive. Corrosive gas will corrode the pump, and special materials must be used to meet the needs.

Oil-free vacuum pump use notes

1. It should have sufficient and good ventilation conditions and an ambient temperature below 40°C.
2. Liquids such as no water and oil will fall on the pump.
3. Do not expose to direct sunlight.
4. It is best to install the pump on a hard foundation similar to concrete.
5. It must be ensured that the pump does not vibrate due to the weak foundation.
6. The connecting pipeline with the pump should not be too long or smaller than the diameter of the pump inlet, which will affect the pumping speed.
7. For a three-phase electric pump, it should be noted that the rotation direction of the motor should be consistent with the direction of the arrow marked on the pump.

Why the vacuum pump does not pump vacuum?

1. Whether the power cord of the vacuum pump is reversed or lacks phase, the motor is not turning right, and it needs to be repaired.
2. The pipeline between the container and the vacuum pump is blocked or leaked, whether the air filter element is blocked, and the garbage needs to be cleaned for a long time.
3. The vacuum pump blade is broken and will not generate a vacuum, and the blade needs to be replaced.
4. The sealing degree of the pumped system does not meet the requirements, and the leakage of the container is too large. Check exclusions.
5. The pump oil is polluted and needs to be changed.
6. The oil filter in the pump is blocked, causing the oil circuit of the compression oil injection system to be blocked, and the oil supply is insufficient, resulting in the poor sealing of the pump body. At this time, the internal oil filter needs to be cleaned; the oil distributor valve is deformed, worn, or damaged, or If the oil supply is insufficient, the value of the oil distributor should be checked and replaced; long-term use will cause wear of the rotary vane of the vacuum pump or insufficient spring tension in the rotor, resulting in the poor isolation of the suction chamber and the exhaust chamber, which will cause the vacuum pump to be evacuated Performance drops.

How to maintain the vacuum pump?

1. The disassembly and cleaning of the mechanical vacuum pump should be carried out in a cleanroom. When disassembling and washing, pay attention to the original installation position, the position of each component, and the tightness of the combination, and make a record together to avoid mis-installation.
2. When taking out the rotary vane and rotor, be sure to hold the rotary vane firmly by hand. The reason is that the rotating blade is subjected to a large tension spring force. If you accidentally fly out of your hand, it will damage the edge or appearance of the rotating blade and cannot be used continuously.
3. The dismantled parts should be properly handled separately to avoid mutual collision or loss. When installing, apply a small amount of vacuum pump oil on the surface of the rolling part to make it flat. Pay attention to cleanliness. Iron filings, dirt, sand, and dust are not allowed to fall into the vacuum pump. The installed vacuum pump should roll easily without uneven weight and clogging.
5. After the final assembly, add the vacuum pump oil from the oil filling hole until the oil mark line is reached.
6. Before starting, a small amount of vacuum pump oil should be injected into the exhaust port to make the vacuum pump fully smooth.