Rotating Shaft Seals provide a very compact and simple solution to seal rotating shafts. These are used in low-pressure applications and the moderate temperature is up to 150°C. These are based on sliding contact between the faces of two rigid rings, or stuffing boxes, based on compression of soft packing material against the shaft. The lip seal is loaded onto the shaft by a combination of the force exerted by the circumferential metal garter spring, the elasticity of the rubber and the fluid pressure. The garter spring is necessary to impart sufficient dynamic recovery. The lip angles are unequal, the inside lip angle being the greater.

Rotating vane flowmeters have the rotor offset toward the bottom of the housing. Through this type of construction, larger volume areas are present at the top. As a result, large volumes of flow can be made to move across the top with little or no return through the bottom. These flowmeters are used in the petroleum industry to measure gasoline, crude oil, and low-viscosity fluids. Metering ranges are available from a few lpm or gpm to 25, 000 barrels per hour for crude oil metering. Accuracies of ±0.1 percent are typical, and values as high as ±0.05 percent are possible with larger instruments.

Rotating washing nozzles has compact design that fits through small openings. It controls the stream or spray pattern of fluid in a spraying, misting, atomizing, and dispensing system. It has a high impact scrubbing action. Its slow rotation speed provides better cleaning and wide coverage.