Acoustic Cleaning Technical Advice
One of the most important installation aspects to get right is the provision of the correct compressed air piping, air volume & pressure. Failure to provide the Primasonics® systems stipulated requirements is by far the major reason for the poor performance of our Audiosonic™ Acoustic Cleaners. The compressed air metal piping up to the point of connection onto the Primasonics®; must have a diameter not less than 25 mm - 1".
Acoustic Cleaners require a volume of 21.25 l/s 45 SCFM @ 5.5 bar/80psi and a pressure of 480-620Kpa (4-8 – 6.2bar) 70-90psi for optimum performance. When using the PAS 60 model there is a minimum air requirement of 5.8 bar. The pressure reading should be made while the horn is operating and the gauge situated near the cleaner, downstream of any accessories that may cause a pressure drop. Plant air is satisfactory; instrument air may be used, but is not required.
We recommend the installation of an entrainment separator positioned upstream of other accessories, as dirt and water can greatly reduce the sound pressure level. Pressure drop can vary widely amongst various separators, and should be weighed carefully against available air supply.
A permanently installed pressure gauge is also beneficial. At the very least, a plugged-off tee should be installed to facilitate easy pressure checks. A shut-off valve (straight through type) and a pipe union installed upstream of other components will permit easy addition of other accessories in the future, and are essential when servicing the diaphragm. It is important to use a ball valve, or another straight through design with full size port to avoid creating a pressure drop.
The inlet adapter is 3/4" [20 mm] to encourage the use of 1" [25 mm] pipe (or larger if desired) from the main air supply to the horn. This is very important to bear in mind, even though the adapter has a 5 mm orifice.
The outlet or back pressure exhaust is ¼" BSP.