Introduction to an online chromatography sample preparation external backflushing system

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This post was last edited by lowod on 2019-3-25 at 10:28. Background: Siemens online chromatography system, with Vici injection valves; the presence of soluble impurities in the medium caused wear of the rotors, and the new rotors started leaking within 2 days of being installed. A small back-blowing system was designed, and the test results were satisfactory; it enables an extension of the rotor’s service life without lengthening the cycle time, from 2 days to around 15 days. The previous PLC read specific signals from the chromatography RS485 address via the network; after the injection time was up, nitrogen was introduced for purging. Friends who are interested can discuss it in detail. I’ve been considering using a valve island recently, as there are 9 chromatographs in the cabin that need to be used simultaneously. Moreover, the internal programs of the Siemens chromatographs experience lagging, which is really frustrating