Accuracy in fermenter feed pumping

520 at Cory medicalA well-known pharmaceutical company in Chesterfield, MO was looking for a fermentor feed pump to replace their existing positive displacement unit that was unable to achieve the turndown ratio needed.

The scientists required a pump that could handle extremely low flows in the initial growth stages followed by more moderate flow rates as the organism grew. This run cycle, carried over long stretches of time, would require the pump to rotate anywhere from 0.1 RPM with a max speed of approximately 11 RPM. The precise rotational speeds and flow accuracy was paramount to ensure optimal organism growth.

The huge 2200:1 turndown range and ±0.5% metering accuracy on the 520 pump made Watson- Marlow the logical choice. The scientists loved the simple step-through menu and how easily the pump integrated into their controller.

After the initial installation of ten 520 pumps, the pharmaceutical company decided to make Watson-Marlow the standard nutrient feed pump for all of the company’s facilities worldwide.


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