Abstract: An exemplary homogenizer includes a valve plate stack having a shim sandwiched by a pair of valve plates, the stack being concentrically aligned by a center stud. Each of the valve plates includes a middle annulus radially situated between an outer rim and an inner raised hub. Each middle annulus includes annulus apertures that help increase flow rate. When the homogenizer is in a working position, the valve plate stack is compressed, and fluid entering through an inlet is homogenized as it passes through a gap between outer rims of adjacent valve plates. The minimum gap between the valve plates is set by the thickness of the shim. In a cleaned-in-process cleaning position, pressure is relieved from the stack, and a spring between adjacent valve plates separates adjacent valve plates. Enhanced drainage, and springs that are substantially sealed from fluids by spring retainers and O-rings, help promote sanitation.

Abstract: An evaporator for use in a plate freezer utilizing carbon dioxide as the refrigerant has a duct with an elliptical shaped cross section. The duct allows a refrigerant, such as carbon dioxide, to pass through the evaporator to create a low-temperature freezer space.

Abstract: An apparatus for providing access to the casing of a burning oil well near the wellhead includes a sled-like carriage which is moved over the ground surface into a position straddling the well casing. A heat shield carried by the sled shields personnel and equipment thereon from the well fire. An excavator is mounted on the sled behind the heat shield for movement toward and beneath the heat shield to excavate a cavity around the well casing. A platform apparatus on the sled, including a pair of jaws openable to allow receipt of the casing, covers the excavated cavity into which a known well plugging device is moved for attachment to the well production pipe after the outer casing is cut away.