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Provac Blog > technical tips

backing pumps dry pumps roughing pumps technical tips vane pumps
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Wet vs. Dry Roughing Pumps

The new trend in roughing pumps for the last 20 years has been to move from “wet” oil sealed piston and rotary vane pumps to “dry” oil-free screw, hook and claw, diaphragm, and scroll pumps. Many customers prefer to not use oil due to the perceived mess oil changes can cause, but there are upsides and downsides to both types of pumps. Reviewing the benefits and disadvantages for both types of vacuum pumps can give you better insight into which type would work best for your application: Dry Pumps Benefits: No oil changes Disadvantages: Higher purchase price Higher cost to rebuild More propensity for major hard part damage More sensitive to contamination (process cannot be run through many types) More...

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“Smoking" Oil-Sealed Rotary Vane Pump

  Question: What is causing the “smoke” coming out of my oil-sealed rotary vane pump exhaust ? Answer: A common complaint we hear about oil sealed rotary vane pumps is that they create a lot of “smoke” from the exhaust. What is commonly reported as “smoke” is often actually oil mist vapor.  The oil in your rotary vane pump both lubricates the moving parts and seals the fine clearances in the pump. Oil has the benefit  of stopping air leakages inside of the pump, however the rigorous oil flow during operation creates an oil mist on the exhaust side of the pump.  An unusual increase in oil mist vapor can indicate that there is a vacuum leak in your system....

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Oil Changes In Oil-Sealed Rotary Vane Vacuum Pumps

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...

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