2) use special booster oil-free compressor, can subpackge various refrigerants like r22/r134a/r410a etc 3) suitable for transferring refrigerants from iso tank or 1000-400l tank to 12-60l cylinder 4) refrigerant filling completely, and auto-stop when the pressure of supply tank is up to -0.04mpa 5) three working-station design, high filling efficiency 6) overall protection system, safe credible 7) filling accuracy is 0.5% 8) can make according to customers' requirements. Product specification/models Model: cm20 refrigerant recovery machine Booster compressor: 1.5hp oil-less Vacuum pump: 2l/s¡¨¢3pcs Refrigerants: r410a/r22/r134a, etc Filling speed: less than 3kg/min Filling range: below 20l tank Model: cm20a refrigerant recovery machine Booster compressor: 1.5hp oil-less Vacuum pump: 4l/s¡¨¢3pcs Refrigerants: r410a/r22/r134a, etc Filling speed: less than 3kg/min Filling range: below 60l tank Application Refrigerant recovery machine for transfer refrigerants on your job-site; Service chillers & other medium cooling systems; On site maintenance of hvac/r products Payment T/t Delivery 7 days Origin China Minimum order 1 Packaging 1-year guarrantee, forever technic support