FIRG/ISO A Adapter Series

The FIRG/ISO A series adapter provides dimensional compatibility between old and new equipment, by adapting imperial nominal size to ISO metric size in a flat face coupler. This avoids changing mismatched couplers, saving time and resources. These bi-directional flow adapters are ideal in systems with high pressure that require reliable leak-free coupling.


  • Size range: 1/2”
  • Working pressure: 250 bar/3750 psi
  • Provides compatibility between old and new equipment
  • Avoids changing mismatched couplers
  • Bi-directional flow
  • Wherever several ‘generations’ of equipment exist
  • High pressure situations that require reliable, leak-free connection

Additional information

Body Size


Port Size

Valve Style


Working Pressure



Download: ISO A ID Chart

thumbnail of stucchi_firg-iso_details
Download PDF