DLXB pH-Rx-Cl/M Version 0115: PP (Polypropylene) Pump Head PTFE (Teflon®) Diaphragm FPM (Viton®) Seals Duck Bill FPM (Viton®) Valves Flow Rate - 0.26 GPH (1 LPH) at 217 PSI (15 BAR); 0.53 GPH (2 LPH) at 145 PSI (10 BAR); 0.79 GPH (3 LPH) at 72 PSI (5 BAR) 120 Strokes per Minute