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Media / Product and service news / Atlas Copco compressed air filters DD/DDp/PD/QD

Atlas Copco compressed air filters DD/DDp/PD/QD



Atlas Copco range of filters ensure clean compressed air. They cover capacities from 9 to 7,200 litres per second.

The DD range of coalescing filters for general-purpose protection removes liquid water and oil aerosols to 0.1 mg/m³ (0.1 ppm) and particles down to 1 micron.
The DDp range are particulate filters for dust protection. They remove particles down to 1 micron.
The PD range of high efficiency coalescing filters, remove liquid water and aerosols to 0.01 mg/m³ (0.01 ppm) and particles down to 0.01 micron.
The QD range of active carbon filters is used for removal of oil and hydrocarbon odours. The maximum remaining oil content is 0.003 mg/m³ (0.003 ppm).

The design of the filters combines maximum contaminant removal efficiency with minimum pressure drop, minimising the energy consumption of the compressed air system.
Built-in safety features ensure a reliable, safe operation. An audible alarm warns when dismantling is attempted under pressure. A pressure relief valve allows each unit to be depressurised before dismantling and also provides a simple check that the automatic drain is functioning correctly.

Atlas Copco filters have a die cast aluminium housing, with epoxy powder paint on the outside and anodised surface treatment inside to prevent corrosion and ensure an extra long lifetime. As standard these filters (except the QD filter) are equipped with a differential pressure indicator or gauge to allow element replacement in due time.
The filter elements are designed with large effective filtration surface for minimum pressure drop and long life-time, providing reduced operational and maintenance costs. The filter media for DD, DDp and PD filters is of different grades of borosilicate micro-fibres to provide the right purity of compressed air according to ISO 8573.1. For the QD filters the filtration media is impregnated with activated carbon to remove hydrocarbon vapours.

A number of optional components for these filter ranges are available, such as filter connection kits, pressure drop indicator with voltage-free contact, wall mounting kits and quick coupling for drainage.

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