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A common question we receive at Provac is "When do I need to change the oil in my oil sealed rotary vane vacuum pump?" Answer: The frequency of oil changes is different for each application. The best way to figure out what frequency works for your organization is to pay attention to the color of your oil. Change in color can indicate contamination or thermal breakdown of the vacuum fluid which leads to decreased pumping quality. If left unchanged, the used fluid can lessen the lifespan of your rotary vane vacuum pump. We recommend changing the oil as soon as you see the color changing. Here are some good practices to follow when changing your oil: Tip: Draining the oil...Full Article