Oil free scroll vacuum pumps manufacturer / supplier in China, offering 8.7L/s (50Hz) 1Pa industrial or lab clean oil free scroll vacuum pump, GWSP300 15.5m³/h (50Hz) 2.6Pa lab or industry or freeze dryer dry clean air oil free oil less scroll vacuum pump, 2.4L/s (60Hz); 2L/s (50Hz) industrial or lab dry air scroll vacuum pump and so on.