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U406 Breakaway


U406 Breakaway

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" .


Body: Aluminum

Main Seals: Viton

Main Spring: stainless steel

Guide and poppet: POM

Protective Sleeve: PVC


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.

Unique double-poppet design-features low pressure drop.

Flow rate: 0-60L/Min(3/4")


Working pressure: 0.18Mpa

Low pressure drop- the integral check valve design allows for minimal pressure drop for faster, high-volume fill-ups.

100% Factory Tested.


Product ID Net Weight Cross Weight Sizet

U406-A 23kg/case of 100 26kg/case of 100 26.8x48x26 cm /case of 100

U406-B 23kg/case of 100 26kg/case of 100 26.8x48x26 cm /case of 100

U406-C 19kg/case of 50 22kg/case of 50 29x29x30 cm /case of 50

U406-D 19kg/case of 50 22kg/case of 50 29x29x30 cm /case of 50

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technical archives

    is provided for maintenance. Check floater. Disconnect upper cover, check ball floater and returned oil floater and find whether oil flow into floater. Ball floater is made of two brass bowls through welting each other. If welding line exists defect it is easy that oil flow into. It is suggested to change a floater or weld the broken. Putting repaired floater into water more than 80 degree, if found no foam at welding line the repaired one could continue to be used. Some manufacturers replace ball floater, returned oil buoy and exhausting valve seat with ball valve subassembly. Adopting Oil-resistant plastic subst fuel dispenser itute thin brass board to make returned oil floater. Suggesting change a new floater as found any abnormal transformation of floater. Inspect returned oil valve. There are two situations exhausting pipe leakage caused by the returned oil valve. One situation is that returned oil valve is cemented due to extensive oil. In this case it is suggested to clean valve and reassemble it. Another situation appears because the returned oil valve is stuck. Taking away burr or waste on leader and reassemble it reference to Diagram 2-13. 3.3 No delivery or inefficient discharge caused by vapor separator Examine filter. A blocked filter not only affects fuel the suction capacity, but also gen fuel dispenser erates abnormal noise. It is suggested to clean and reassemble filter. Don’t use brush to clean metal net so as not to increase net hole and fuel dispenser affect filter accuracy. Inspect check valve. If check valve is stuck fuel dispenser can’t discharge any oil. The method to solve the problem is to clean waste after disconnecting spring seat, spring and check valve, and reassemble it. Make sure that the movement of check valve is agile. Inspect the leakage between tank and fuel dispensers. The inspection is conducted with filter check. If no oil or oil level go down slowly in low pressures chamber, there must leakage in bottom valve or pipeline. If there is still leakage occurred after solve above problem, carefully examine

technical specification

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