Blending apparatus & method.

摘要

An in-line blender for blending components in the form of liquid or other fluent materials comprises a pipeline 16 having a plurality of injection points 17, each injection point being connected to a set of selector valves 26 each connected to a separate source 10 of component. Only one of these selector valves at a time is connected to the injection point 17. Between the set of valves 26 and the injection point 17 there is mounted a metering apparatus in the form of a positive displacement pump 13 and a meter 14.