Ac Vacuum Pump china Vacuum pumps are component of one of the final procedures in the repair procedure. After you’ve diagnosed and repaired any leaks or various other issues in the machine it’s time to recharge. Before recharging you desire to make sure the machine is free of any undesirable gasses, air, or drinking water. If we were holding 
to stay in the system, it would 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 requirements, consider the tonnage of the systems you focus on. Take the square root of that number and you’ll get the approximate CFM you need to have to utilize that system. Typical home systems need 4-5 CFM, while industrial and rooftop systems generally require as much as 6-8 CFM.