Vacuum pumps are component of among the final procedures in the repair procedure. After 
you’ve diagnosed and repaired any leaks or other issues in the system it’s time to recharge. Before recharging you desire to make sure the system is free of any undesirable gasses, air, or drinking water. If these were to remain in the system, it could turn the oil it runs on into sludge and leave behind damaging impurities.
The draw on a vacuum pump is usually divided into its “CFM,” or Cubic Feet per Minute. To estimate what your CFM Ac Vacuum Pump requirements, look at the tonnage of the systems you focus on. Take the sq . root of that quantity and you’ll get the approximate CFM you must have to utilize that system. Typical residential systems need 4-5 CFM, while industrial and rooftop systems generally require just as much as 6-8 CFM.