Testing seals with fluorescent powder

Leak detection powder: Principle

To validate installation of a new set of bags or pockets, or to locate any leaks if dust emission peaks are noted, it is advisable to carry out a test with fluorescent powder.

This test is carried out using fluorescein, a coloured, inert, non-toxic tracer that reacts to ultraviolet light (the choice of colour is important to obtain the sharpest possible contrast with the dust).

Carrying out the test

Inspecting the filter

• Inspection of the filter on the clean air side prior to injecting the tracer.
• Inspection of the bags via the hopper
• Obstruction or removal of any perforated bags noted during this brief inspection.

Injecting the powder

• Injection of the powder upstream from the filter, using suction, and creating sufficient turbulence to spread the powder evenly throughout the suction current.
• Introduction of the optimum quantity of powder as compared with the filtration surface of the filter.

Detecting leaks

• Opening the filter doors and using an ultraviolet lamp to inspect the clean air casing, the cleaning nozzles, the venturi and the tops of the bags.
• The presence of coloured tracer shows that there is a leak. Traces of coloured powder can be seen around the zone where the leak is located.
• The inspection using an ultraviolet lamp must be carried out in complete darkness. Any presence of light or sunlight affects the quality of detection.

Associated products and services

		Complete services Having a leakage test carried out by our TTL Maintenance teams. > Request for estimate
		Fluorescein Fluorescent powder colours available: yellow, green, orange and pink.   > Request for estimate
		Ultraviolet lamp Lamp used to detect the presence of fluorescent powder.   > Request for estimate