Vacuum pumps are part of one of the final procedures in the repair procedure. After you’ve diagnosed and repaired any leaks or various other issues in the system it is time to recharge. Before Ac Vacuum Pump china recharging you desire to make sure the machine is free from any unwanted gasses, air, or drinking water. If they were to stay in the system, it would turn the essential oil it operates on into sludge and keep behind damaging impurities.
The draw on a vacuum pump is usually broken down into its “CFM,” or Cubic Feet per Minute. To estimate what your CFM needs, look at the tonnage of the systems you work on. Take the sq . root of that number and you’ll obtain the approximate CFM you need to have 
to utilize that system. Typical residential systems need 4-5 CFM, while commercial and rooftop systems generally need as much as 6-8 CFM.