According to ISO 2026 3 inch connector.
This International Standard specifies the dimensions of
connections for starting aircraft engines by air,
which are necessary to ensure international
interchangeability of connectors with adaptors.
It also gives the minimum clearances required on the aircraft
to provide adequate access for the ground adaptor.
self-locking design provides visual positive engagement with the aircraft nipple.
a red band around the coupler indicates if not properly engaged – further
enhancing productivity while reducing training requirements.
Red markers appear when not connected correctly
Integrated non return valve
Eight Stainless ball locking system
Elastomer protection
Protective stainless steel screen
less pressure drop through the coupler (at 180 ppm the pressure drop is 1 PSI ) The integrated non-return