Vacuum pumps are part of among the final procedures in the repair procedure. After you’ve diagnosed and repaired any leaks or additional issues in the system it is time to recharge. Before recharging you need to make sure the system is free of any undesired gasses, air, or water. If they were to remain in the machine, it would 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 each and every minute. To estimate what your CFM needs, look at the tonnage of the systems you work on. Take the sq . root of that Ac Vacuum Pump quantity 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 need just as much as 6-8 CFM.
