Abstract: A fluid mixer providing improved fine mixing of a rough mixture of liquid and gas. The mixer includes a plurality of grooved annular plates defining an annular array of flow passages leading inwardly from a delivery space receiving the rough mixture to an inner central outlet space for discharging the fine mixture. The gas is introduced into the liquid to define the rough mixture in the form of an annular stream directed toward an inlet opening delivering the liquid to a mixing space. The rough mixture is delivered through a transfer space to the annular space about the fine mixer. The annular inlet space has a relatively large volume to provide a low flow rate therethrough to the fine mixer. Confronting grooves of the fine mixer plates may cross, and in the illustrated embodiment, the grooves of one face cross a plurality of grooves of the opposite face. The grooved plates may be arranged in aligned relationship or may be randomly disposed as desired.

Abstract: A readily disassembleable fluid flow rate controller arranged for facilitated sanitizing whereby the controller is adapted for use in controlling the flow rate of fluid food products and the like. The controller includes an adjustable orifice device and a spring-biased regulating device. The orifice and regulating devices are removably installed in a separable housing. Removable securing structure is provided to permit facilitated disassembly and assembly of the controller for facilitated sanitizing of the elements thereof.