Ultrasonic-Leak-Tester for Fuel-Distributor-Rails

Ultrasonic-Leak-Testing of MACEAS is detecting directly the back scattered sound of leak bubbles when hit by an ultrasound wave. Measuring the time-of-flight, the distance between the transducer and the bubbles can be calculated using the speed of sound in water. Therefore leak bubbles can be easily detected and localised without operator.

Typ: USLT-FDR-SA-1Sx4A

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Machine example
4-fold machine with manual handling of parts
• Manual placement
• Automatic sealing
• Automatic testing

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Technical data

Test method USLT
Test pressure	6 bar (absolute)
Pressure outside	1 bar (Atmosphere)
∆p	6 bar
Test gas	Air
Leak rate	10-3 mbar·l/s

7 bubbles with a diameter of 2 mm within 30 s

Machine capacity
Capacity	120 St./h
Effective cycle time	30 s
Changeover time	< 30 min

Appropriate to
Fuel-Distributor-Rail of different Types

Background
Visual bubble test in the water bath done by an operator is the most common method for leak testing of Fuel-Distributor-Rails. The disadvantage of this method in general is that the operator‘s result strongly depends on the boundary conditions as: lightning, contrast, water quality and not least on the concentration of the operator. Of course operator testing is not an automatic procedure and is increasingly no more accepted in automotive industry. Other automatic leak testing methods are not so convenient for the Fuel-Distributor-Rail and can not localise the leak. Therefore an additional work step is required for analysing the leak.