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High efficiency and low noise， heavy-duty aluminum alloy casing oil drain plug positioned at bottom of oil reservoir internal high volume cooling fan for extended use exhaust port with exhaust cap, direct drive motor allowing easy starting which is maintenance free comes with a bottle of vacuum oil specification: volta, benefits of an ac vacuum pump. when it comes down to it, there is truly an abundance of uses for a vacuum pump. while these products are primarily utilized by hvac professionals, they can also be used by scientists..
With so many hvac vacuum pumps to choose from how can you make sure you’re purchasing the right one for your job?. main things to look for when buying a hvac vacuum pump. cfm (cubic feet a minute) stage (1-stage or 2-stage) cfm the cfm (cubic feet per minute) on hvac vacuum pumps is how fast it can pump out air and can vary between 2-10 cfm.