The U406 is designed to be installed on fuel dispensing hoses,and will separate when subjected to a designed pull force. The dual valves seat automatically, stopping the flow of fuel and limiting any fuel spillage, while protecting the dispensing equipment.
For proper operation, the U406-A/B should be installed with a "straightening"
hose with a minimum length of 9". U406-C/D should be installed with a minimum length of 12" .
Guide and poppet:
Pull force- the U406 will break away with a pull force of 250 lbs ±5%, the
U406 will break away with a pull force of 300 lbs±5%.
Certainty of operation- designed to be replaced after separation, instead of
reassembled, to protect against reassembly errors.