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.

[5] Headquartered in Irving, Texas, which is in the Dallas–Fort Worth Metroplex, Flowserve employs close to 16,000 employees in more than 50 countries.

[6] Flowserve sells products and offers aftermarket services to engineering and construction firms, original equipment manufacturers, distributors, and end users.

Acquisitions include HydroTechnik Olomouc in 2006,[9] Sealing Systems in 2007,[10] Calder AG in 2009[11] and Valbart Srl in 2010.

They are in alphabetical order: ACEC Centrifugal, Accord, Aldrich, Anchor Darling, Argus, Atomac, Automax, BW Seals, Byron Jackson, Cameron, Calder, DuraClear, Durametallic, Durco, Edward, Five Star Seals, Flowserve, IDP, Innomag, Interseal, Jeumont-Schneider, Kammer, Limitorque, Logix, McCANNA/MARPAC, NAF, NAVAL, Noble Alloy, Norbro, Nordstrom, PMV, Pac-Seal, Pacific, Pacific Wietz, Pleuger, Polyvalve, Schmidt Armaturen, Scienco, Serck Audco, Sier-Bath Rotary, SIHI (Siemen & Hinsch), TKL, United Centrifugal, Valtek, Valtek EMA, Vogt, Western Land Roller, Wilson-Snyder, Worcester Controls, Worthington Flowserve has grown through mergers and acquisitions.