oil free pump No oil in either vacuum, pressure or combination application;Quiet operation; oil free pumpContinuous operative vacuum 60kPa or low; capacity 135~1190L/min(50HZ)No oil in either vacuum, pressure or combination application;Quiet operation; long life; gauge and controller equipment standard; Dependable proven design. ItemUnitWQB40-P-VBWQB40-P-VWQB60-P-VBWQB80-P-VBCapacityM3/ ...