... Air pump Pressure,gas flow are self-control 2L-40L,OEM producer producing highly pure quality air little noise,easy operate Air ... control by phase and use the technology of air condensation, separation and purification by step, producing ... for spectrum analysis and atomic absorption. Technical Parameter Type/ SpecificationQL-3QL-10QL-20QL-40Output Volume (ml/min ... Kg)< 26< 30< 34< 36 QL-40 Air Pump type