LB Bentley designs and manufactures specialist bespoke filters. Each filter is specifically designed to meet customers’ precise requirements.

Low, Medium and High-pressure air filters remove moisture, oil, vapours, odours, carbon monoxide and other gaseous vapours and solid particulates commonly present in compressed air.


Deployment of our air filters results in high quality, clean air suitable for breathing applications.  They conform to  BS EN 12021 and DEF STAN 68/284 standards, we can also achieve other standards on request. 

The filters are constructed of carbon steel or stainless steel. The filter head can be unscrewed by hand and all filter parts can be renewed in minutes without the use of tools. All units can also be provided with manual drain valves.  The available filters are:

> Adsorption Filters
> Particulate (dust) Filters
> Pre-filters
> Water/Oil Demister Filters




Adsorption Filters

Adsorption filters are available as three, four or five stage systems and normally comprise of a glass microfiber coalescer filter.

 Our adsorption filters are manufactured to remove liquid oil from the compressed air stream with an activated carbon, desiccant and/or catalytic canister to remove water and hydrocarbon vapour and odours, and/or to reduce carbon monoxide concentrations. They also have an in-line filter for final removal of dust particles. 

Particulate (dust) Filters

Particulate (dust) filters are fitted with elements of various grades to remove and prevent the carry-over of dust or other particles to 0.01 micron and above. 

The capabilities our our Particulate (dust) filters makes them ideal as an after-filter for desiccant dryers or for applications where a high standard of filtration is required.

The filter element is constructed of pleated layers of glass fibres in an in-depth arrangement, which has the ability to accumulate large amounts of solid particles and resist clogging. This allows a gradual increase in pressure drop across the filter, resulting in a long operational life.


Our pre-filters feature a mechanical 1 micron separator element to remove heavy condensates. The filter also has the ability to retain large quantities of solid particles without clogging.

Water/Oil Demister Filters

LB Bentley’s water / oil demister filters incorporate unique cartridges for silencing and separating water / oil mist from low and high pressure compressed air exhaust drainage points.

They remove 100% of water / oil mist particles from air being exhausted at pressures up to 6,500psig (450 bar g) to atmosphere. They also eliminate water / oil mist and smoke within buildings and ensure a clean working atmosphere.

The filters can be installed inside or outside buildings, allow the use of compressed air drainage points where environmental regulations would not normally allow (especially new industrial estates) and provide suitable collection points for waste disposal.

They have been designed for compressed air systems where it is necessary to silence, separate and collect all condensate and sludge discharge from air compressor inter-cooler stages such as, after cooler, air dryers, air receivers, filters and automatic drain traps. They are ideal for areas where cleanliness is important and where site water/oil condensate and sludge cannot be sent direct to drains or wasted over a floor area. Their special cartridges combine excellent liquid separation characteristics with fine filtration and a large capacity for containment of liquid condensate.

Our oil demister filter vessels are constructed of carbon steel and are available with either a large removable top lid to allow air to be exhausted direct to atmosphere, or a flanged pipeline unit with bottom swing bolt closure for applications where the exhaust has to be piped to a suitable discharge point.


> Filters and dryers brochure
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