A pneumatic filter is a device which removes contaminants from a compressed air stream. This can be done using a number of different techniques, from using a "media" type that traps particulates, but allows air to pass through to a venturi, to a membrane that only allows air to pass through. Usage It is now common to have various stages of filtration employed in a filter-regulator-lubricator form factor, usually with the different filter housings connected. Air filtration applications are diverse and include end-user sectors such as cleanroom environments, biomedical, analytical instrumentation, food processing, marine and aviation, agriculture, manufacturing, food and beverage packaging and a host of other uses. Source: wikipedia
Source:
http://en.wikipedia.org/wiki/Pneumatic_filter
