Patent ID: 8313701

Claim:
A chemical feeder system for administering a desired concentration of a treating chemical to a flowing fluid stock, the system comprising: a first ejector fluidicly connected with the flowing fluid stock; a second ejector fluidicly connected with the flowing fluid stock; a metering assembly comprising a flow rate sensor and a metering device interconnected to form a chemical flow path between a chemical inlet and a metered chemical outlet, the flow rate sensor positioned upstream of the metering device in the chemical flow path; an aqueous chemical in fluid connection with the chemical flow path through the chemical inlet; a metered chemical conduit extending from the metering assembly to the first ejector and the second ejector; and an ejector switchover operationally connected within the metered chemical conduit to selectively route the flow of the aqueous chemical from the metered chemical conduit to one of the first ejector and the second ejector.