Features: 2 chamber dual diaphragm Positive displacement On demand operation Chemical resistant polypropylene body 30 to 60 PSI (2.1 - 4.1 bar) The reliable solution for a multitude of air powered applications. The 166 handles tough chemicals and is well suited for cleaning agent injection and foaming. Two-chamber positive displacement design operates on 30-60 PSI (2.1-4.2 bar) supply and gives on demand operation. Will deliver a continuous flow rate of 0.6 GPM (2.3 l/min). Model Description 166-200-36 Viton® Air Pump 0.6 GPM (2.3 l/min) continuous duty Viton® valves and diaphragm 166-200-46 Buna Air Pump 0.6 GPM (2.3 l/min) continuous duty Buna valves and diaphragm 166-200-56 EPDM Air Pump 0.6 GPM (2.3 l/min) continuous duty EPDM valves and diaphragm 166-200-57 Santoprene® Air Pump 0.6 GPM (2.3 l/min) continuous duty Santoprene® valves and diaphragm