Parker OFAS LE (Low Energy) Oil Free Air Systems deliver clean, dry, technically oil-free compressed air in accordance with all editions of ISO 8573-1, the international standard for compressed air quality.

They are energy efficient and can provide pressure dewpoints of ≤-70°C, ≤-40°C or ≤-20°C at flow rates between 408 m³/hr and 2040 m³/hr @ 7 barg, 35°C for a single bank, higher flows available with multi-banking.

Using clean, dry compressed air improves productivity whilst reducing maintenance costs and downtime. Many products claim to provide this, however OFAS LE Oil Free Air Systems provide high levels of compressed air purity with 3rd party validated performance in accordance with international standards.

Energy efficient, vacuum assisted heatless regeneration significantly reduces the volume of regeneration air (purge air) required to regenerate the offline desiccant column. The combined cost of operating the vacuum pump plus the generation cost of the reduced volume of purge air provides a dryer with an average energy saving of around 63% when compared to an equivalent heatless dryer.

Many applications specify the need for ‘oil-free’ compressed air. Ambient air drawn into an air compressor contains oil in a vapour phase, which after compression, cools and condenses in the compressed air system to produce liquid oil and aerosols of oil. No matter which type of air compressor is installed (oil lubricated or oil-free), if the application requires ‘oil-free’ compressed air, treatment is required.

The coalescing filters and OVR adsorption filter fitted as standard to Parker OFAS models treat both the oil vapour from the ambient air as well as oil from a lubricated compressor, providing technically oil-free compressed air from both oil-free and oil lubricated compressors.

Using clean, dry, oil-free compressed air improves productivity whilst reducing maintenance costs and downtime. Many products claim to provide this, however OFAS HL Oil Free Air Systems provide the highest levels of compressed air purity with 3rd party validated performance in accordance with international standards.

Product Features
• Supplied with 5 Stages of purification, treating 8 of the 10 main compressed air contaminants (9 with optional liquid separator)
• Constant outlet dewpoint in accordance with ISO8573-1 classes 1, 2 or 3 for water vapour
• Clean, dry purge air used for regeneration
• Dryer tested in accordance with ISO 7183
• Dewpoint performance 3rd party validated by LRQA
• ISO 8573-1 class zero technically oil-free air (total oil ≤0.003mg/m³)
• Low energy vacuum assisted heatless regeneration
• No heat required for regeneration
• Inlet pressure, temperature and outlet dewpoint measurement as standard
• Colour HMI touch screen for dryer monitoring and outlet dewpoint display
• Two energy saving systems included as standard: Purge Economy (compressor synchronisation) and DDS-EST dewpoint dependant switching
• Web server for dryer monitoring via local area network (LAN)
• MODBUS TCP/IP & MODBUS RTU

To ensure quoted performance, a compressed air dryer must be sized using the correction factors found in the product information sheet.

To discuss your specific requirements please contact Parker or an authorised Parker distributor.

OFAS HL/LE 100-170 Large Flow Heatless Regeneration Compressed Air Treatment System