Vacuum pumps are component of one of the final processes in the repair process. After you’ve diagnosed and repaired any leaks or various other Ac Vacuum Pump issues in the machine it is time to recharge. Before recharging you desire to make sure the machine is free of any undesired gasses, air, or water. If these were to stay in the machine, it could turn the oil it runs on into sludge and leave 
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 requirements, look at the tonnage of the systems you work on. Take the sq . root of that quantity and you’ll obtain the approximate CFM you must have to utilize that system. Typical home systems need 4-5 CFM, while industrial and rooftop systems generally need just as much as 6-8 CFM.