Description Ultimate service conditions Membrane type Polyamide Composite Membrane Maximum operating temperature 113℉（45℃） Maximum operating pressure 600 psi（41.4bar） pH range, continuous operation 3-10a Maximum Influent SDI 5 Free chlorine tolerance <0.1 ppm b a. When pH > 10, the maximum allowable temperature for continuous operation is 95℉（35℃）. b. Under certain conditions, the presence of free chlorine and other oxidants will lead to premature failure of membranes. Therefore, it is recommended that the membrane be pretreated to remove residual free chlorine before water comes into contact with the membranes.