The Flowserve Corporation is an American multinational corporation and one of the largest suppliers of industrial and environmental machinery such as pumps, valves, end face mechanical seals, automation, and services to the power, oil, gas, chemical and other industries. Headquartered in Irving, Texas, which is a suburb of Dallas, Texas, Flowserve has over 15,000 employees in 51 countries. Flowserve sells products and offers aftermarket services to engineering and construction firms, original equipment manufacturers, distributors and end users. The Flowserve brand named originated in 1997 with a merger of BW/IP and Durco International.