Kelso Technologies Inc., a railroad equipment supplier, produces and sells tank car service equipment used in the loading, unloading, and containment of hazardous materials during transport in the United States and Canada. It offers external constant force spring pressure relief valves that carry hazardous and nonhazardous commodities; manway securement systems; bottom outlet valves; vacuum relief valves; emergency response kits; ETS products; truck tanker equipment; active suspension control systems for combined road-no-road vehicles; wheel cleaning systems for rail cars; and fuel loading systems, such as mechanical and non-pressurized fuel filling valves for locomotives, marine, and military applications. The company was formerly known as Kelso Resources Ltd. and changed its name to Kelso Technologies Inc. in July 1994. Kelso Technologies Inc. was founded in 1987 and is headquartered in Surrey, Canada.