Cytiva Sweden Ab

Bashkar Hv

Klaus Gebauer

Prashanth Hosabettu Mohan

Ajit S Vernekar

Nachiket Karmarkar

Sasi Kumar Nutalapati

Nityananda Maiya

Sameera Simha Hindupur

Sudheer Mygapula

Shashidhar Hedge

Sasikumar Arumugam

The invention discloses a method of controlling a transmembrane pressure (TMP) in a crossflow filtration apparatus, comprising the steps of: a) providing a crossflow filtration apparatus comprising a pump () fluidically connected via a retentate compartment () of a crossflow filter () and a length of flexible tubing to a regulator valve (1; 101) acting on the flexible tubing, wherein the regulator valve is a high precision pinch valve. The apparatus further comprises a first pressure transducer () adapted to measure a pressure between the retentate compartment and the regulator valve, a second pressure transducer () adapted to measure a pressure between the pump and the retentate compartment and a third pressure transducer () adapted to measure a pressure at a permeate outlet () of the crossflow filter, and a control unit () electrically or electromagnetically connected to said regulator valve, the first, second and third pressure transducers and optionally to the pump; b) pumping a liquid with the pump via the second pressure transducer, through the retentate compartment via the length of flexible tubing, the first pressure transducer and the regulator valve; c) controlling the regulator valve with the control unit, such that a TMP calculated by formula (I) TMP=(P+P)/2−Pcorresponds to a predetermined TMP value or to an interval between two predetermined TMP values, wherein Pis a pressure reading from the second pressure transducer, Pis a pressure reading from the first pressure transducer and Pis a pressure reading from the third pressure transducer.

Method for pressure control in crossflow filtration

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Bengaluru, India

Bashkar Hv