current-production Rotax 582. Use in production engines UK company RCV Engines Ltd uses rotating cylinder liner technology as a specialized form of rotary valve in some of their four-stroke model engine and small-engine line-up. RCV also use horizontal and vertical rotary valves in four-stroke engines in their current range of engines. RCV have developed a 125cc rotating cylinder liner engine, incorporating a rotating valve in the cylinder liner, for scooter applications. PGO Scooters of Taiwan were working with RCV in developing the engine for their applications. The Suzuki RG500 "Gamma" was powered by a two-stroke, rotary valve, twin crank, square four engine displacing 498 cubic centimeters. The power output was 93.7 brake horsepower (69.9 kW) at 9,500 RPM. Use in chromatography Rotary valves are used for loading samples on columns used for liquid or gas chromatography. The valves used in these methods are usually 6-port, 2-position rotary valves. See also Airlock Itala cars Piston valve Poppet valve Rotary feeder Slide valve References Valves Brass instrument parts and accessories