The silencers are indispensable elements for eliminating or reducing the characteristic noise of com-pressed air during discharge operations. They should always be placed on the outlets of 3/2, 5/2 or 5/3-way valves. When carrying out maintenance, the silencers should be degreased using white spirit or paraffin and compressed air blown through them in the opposite direction to operation.

Flow rate: determined with inlet supply 6 bar and output in atmosphere. Noise level: In order to deter-mine the level of noise, a test is carried out using a phonometer. Placing the phonometer one meter away from the application at the same height for a period of ten seconds gives an average reading of the noise generated.