Patent ID: 7776275

Claim:
A chemical feeder system for administering a desired concentration of a treating chemical to a fluid, the system comprising: an aqueous chemical contained in a chemical source, the aqueous chemical connected with a flowing fluid stock through a chemical flow conduit; an ejector drawing the aqueous chemical into the flowing fluid stock; and a feeder assembly connected within the chemical flow conduit and oriented substantially vertical to ground level, the feeder assembly comprising: a metering device comprising a shaft having a collar seal disposed at a first end and a second end connected to a motor, the shaft moveably disposed with an orifice; a flow rate sensor positioned upstream of the metering device; and a controller operationally connected between the flow rate sensor and the metering device, the controller operable to actuate the shaft in response to a flow rate reading at the flow rate sensor to achieve a desired application flow rate of a treating chemical through the chemical flow path, wherein the aqueous chemical flows in a substantially vertical direction relative to the ground through the flow rate sensor and then through the metering device.