Vacuum pumps are part of among the final procedures in the repair process. After you’ve diagnosed and repaired any leaks or various other issues in the machine it’s time to recharge. Before recharging you wish to make sure the Ac Vacuum Pump china system is free from any undesirable gasses, air, or drinking water. If they were to remain in the system, it would turn the essential 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 each and every minute. To estimate what your CFM needs, consider the tonnage of the systems you work on. Take the square root of that amount and you’ll get the approximate CFM you need to have to utilize that system. Typical 
residential systems need 4-5 CFM, while commercial and rooftop systems generally require just as much as 6-8 CFM.