Vacuum pumps are component of one of the final 
processes in the repair procedure. After you’ve diagnosed and repaired any leaks or additional issues in the machine it is time to recharge. Before recharging you want to make sure the system is free of any undesired gasses, air, or water. If we were holding to remain in the machine, it would turn the 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 Ac Vacuum Pump china Minute. To estimate what your CFM needs, look at the tonnage of the systems you work on. Take the square root of that amount and you’ll get the approximate CFM you must 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.