Causes and solutions for smoke emission from vacuum pumps
During the use of vacuum pumps, the problem of smoke emanating from rotary vane vacuum pumps may occur. This is usually due to the oil mist separator inside the pump body's oil tank not being replaced for a long time, leading to increased internal pressure within the pump. Simultaneously, a small amount of carbon buildup inside the pump body cokes under high temperatures, producing smoke. Our solution to this problem includes cleaning carbon deposits from the oil tank, unblocking oil lines and pipes, and replacing the oil filter. Replacing the oil mist separator (also known as the exhaust filter) of the rotary vane vacuum pump is also a crucial step.
It's important to note that it's normal for a rotary vane vacuum pump to emit smoke when it first starts operating. However, if the smoke persists for an extended period, it's necessary to check the pipes, valves, and containers outside the air inlet for any repairs and take appropriate action. Once these steps are completed, the smoke issue should be resolved.
Generally, newly purchased vacuum pumps are mainly affected by the first two situations. So how do you determine whether the problem is caused by too much vacuum oil in the pump or a system leak? Svank teaches you a simple method: Remove the vacuum pump from the system, run the vacuum pump, and then cover the suction port with your hand. Let the vacuum pump run for a while and see if it smokes. If the vacuum pump runs normally without obvious smoke, it can be basically determined that there is a system leak. At this point, you need to check the system, especially the joints. If you find that the vacuum pump is smoking using this method, it means that too much pump oil has been added; simply drain some pump oil. The vacuum pump oil level should ideally be half full.