This report compares pressure and flow pulsations from a White Knight closed-loop control system and Levitronix system and evaluates their effect on the retention efficiency of a membrane filter. The White Knight system featured a PSA060 bellows pump; the Levitronix system used a BPS-4 centrifugal pump.
A White Knight PXASD060 bellows pump and Levitronix BPS600 centrifugal pump were run simultaneously in identical recirculation systems. The bath temperature was recorded eight hours. White Knight’s pump maintained a stable fluid temperature. The centrifugal pump heated the fluid bath significantly.