1.Oil-less, non-lube piston and cylinder. 2.Permanently lubricated bearings. 3.Stainless steel valves. 4.Patent valve plate s ItemStandardRated voltage / frequency220V/ 60 HzInput power≤320WRated working pressure-800KPaMax.Vacuum≥7.7mmHG ≥5.0mmHG(at-800 Kpa pm)Rated speed≥-900 RPMThe use of environmental temperature0-40 °CInsulation ClassBThermal protectorAuto-reset 135±5°CRestart pressure0 ...