Vacuum pumps are part of among the final procedures in the repair process. After you’ve diagnosed and repaired any leaks or additional issues in the system it’s time to recharge. Before recharging you really want to make sure the system is free of any undesirable gasses, air, or water. If we were holding to 
remain in the system, it would turn the essential oil it operates on into sludge and keep behind damaging impurities.
The draw on vacuum pressure pump is usually broken down into its “CFM,” or Cubic Feet per Minute. To estimate what your CFM needs, consider the tonnage of the Ac Vacuum Pump systems you focus on. Take the sq . root of that amount and you’ll obtain 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 need as much as 6-8 CFM.