Ultraflo Corporation
- Manufactures resilient-seated butterfly valves and control valves specializing in chemical, petrochemical and petroleum industries.
- http://www.ultraflovalve.com

Posi-flate butterfly valves
- Manufactures inflatable seated butterfly valves for a variety of industrial valve requirements including gas, fluid, dry solids processing.
- http://www.posiflate.com

AMRI, Inc.
- Manufactures butterfly valves, accessories and actuators for application in industries like chemical, petrochemical, pulp and paper, water and semi-conductor.
- http://www.amrivalves.com

Adams Armaturen
- Manufactures butterfly and branded 'triple-offset' valves for application in for steam services.
- http://www.adams-armaturen.de