Profile: Mafi-Trench Corporation supplies radial expansion turbines or turboexpanders to the natural gas processing, petrochemical, power generation and hydrogen purification industries. We are ISO 9001:2000 certified. We provide engineering, testing and manufacturing capabilities. Our products are used in hydrocarbon gas processing, LNG, refrigeration and power recovery. Our expander-compressors are high-speed rotating machines used in cryogenic applications. We eliminate high-speed coupling, and the separate expander shaft, bearings, and bearing housing.