A controlled cavitation device for mixing and heating of fluids in industries where sanitary conditions must be maintained. The device is easily disassembled for thorough cleaning and then easily assembled for continued operation. All internal surfaces are devoid of angles and are polished to food industry standards to maintain sanitary operation. The controlled cavitation device includes a cylindrical bearing housing for supporting a drive shaft that extends through each end of the bearing housing. An interior end plate is mounted to a C-face mount adjacent to the bearing housing and has a plurality of threaded bores around a periphery. A rotor is mounted adjacent to the interior end plate on the C-face mount. A housing assembly includes a cylindrical housing wall and is mounted on a swing arm assembly that is secured in place adjacent to the rotor. The housing assembly is rotated about a pivot arm in a first direction to fully enclose the rotor during assembly and is rotated in an opposite direction to expose the rotor during disassembly. An exterior end plate is fixed to one end of the housing wall to form a flange for connecting the housing assembly to the interior end plate.