Exhaust filter/silencer Parker Filtration and Separation

Types 9955-05-DX, 9955-11-DX,
9955-12-DX, 18/18-DX and ECSB-4

Balston Filter/Silencers are remarkably efficient sound mufflers, far more efficient than the felts, pleated paper, sintered plastic and sintered metal products commonly used in other exhaust silencers. A sound attenuation efficiency test comparing a 9955-12-DX, 1/2" Filter/Silencer with a sintered polyethylene silencer is described below. This silencing efficiency test simulates the action of an air cylinder discharging rapidly to atmosphere. A length of 1/2" line between two ball valves is pressurised with air to a controlled pressure. The upstream valve is closed and then the downstream valve is opened rapidly to discharge the fixed volume of air under pressure to atmosphere. Noise levels were measured at a 0.75 metre distance, firstly with no silencer on the end of the line, secondly with the Balston Filter/Silencer and lastly with competitive silencer.

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