Maximum Operating Temperature and Pressure. 2.1 bar (210 kPa, 30 psi) at 60 °C (140 °F) or 5.5 bar (550 kPa, 80 psi) at 21 - 24 °C (70 - 75 °F) Typical Differential Pressure < 0.07 bar (7 kPa, 1 psi) @ 1 mL/min; Mean Flow Rate. 1 - 4 mL/min; flow rate will vary with type of solutions, concentration of proteins, and other components