| Client name | City | Country |
|---|---|---|
| Fibrant B.V. | Urmond | Netherlands |
| Fichtner GmbH & Co. KG | Stuttgart | Germany |
| Finze & Wagner EMSR Ingenieurges. mbH | Burghausen | Germany |
| Fisher-Gulde Regelarmaturen GmbH & Co. KG | Ludwigshafen | Germany |
| Fisher-Rosemount AG | Wiener Neudorf | Austria |
| Flagsol GmbH | Essen | Germany |
| Flow Control Applications S.L. | Ibarra (Guipúzcoa) | Spain |
| Flow-Tek, Inc. | Houston | United States |
| Flowserve Control Valves GmbH | Villach | Austria |
| Flowserve DALCO | Louisville | United States |
| Flowserve Essen GmbH | Essen | Germany |
| Flowserve Flow Control GmbH | Ettlingen | Germany |
| Flowserve Flow Control GmbH | Nettetal | Germany |
| Flowserve S.r.l. | Cormano | Italy |
| FLOWTEC Industrietechnik GmbH | Graz | Austria |
| Fluid Control Research Institute | Palakkad | India |
| Fluor B.V. | Hoofddorp | Netherlands |
| Fluor Engineering N.V. | Antwerp | Belgium |
| Fluor Limited | Farnborough | United Kingdom |
| FLUVIUS Flow Control GmbH | Wiener Neustadt | Austria |
| Forbes Marshall Arca Pvt. Ltd. | Pune | India |
| Forbes Marshall Pvt. Ltd. | Pune | India |
| Forbes Marshall Pvt. Ltd. | Pune | India |
| FORGAS Sp. z o.o. | Szczecin | Poland |
| Formosa Chemicals & Fibre Corporation | Taipei | Taiwan, Province of China |