Ac Vacuum Pump Vacuum pumps are part of one of the final processes in the repair procedure. After you’ve diagnosed and repaired any leaks or other issues in the machine it’s time to recharge. Before recharging you need to make sure the system is free from any undesirable gasses, air, or water. If they were to stay in the system, it would turn the oil it runs on into sludge and keep behind damaging impurities.

The draw on vacuum pressure pump is usually broken down into its “CFM,” or Cubic Feet each and every minute. To estimate what your CFM requirements, consider the tonnage of the systems you focus on. Take the square root of that quantity and you’ll get the approximate CFM you need to have to work with that system. Typical home systems need 4-5 CFM, while commercial and rooftop systems generally require just as much as 6-8 CFM.