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Dosing Indigo Blue Dye

Dosing Indigo Blue Dye
150 millilitres of dye concentrate per minute must be continuously introduced into the process for colouring cotton(denim), e.g. for jeans. As potential pressure fluctuations and other variables have a negative effect on the amount to be controlled, this small amount could not be fed into the system directly from a supply tank with a metering pump. A controlled system had to be established. This consists of a process controller, a volumetric flowmeter and a control valve.
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