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Committed to superior productivity
Untreated compressed air can be contaminated by dust, water and oil. This makes filtration a crucial component of your air system. Atlas Copco has developed filtration solutions that protect your air-powered tools, your processes, and your final products. Our extensive offer includes different filter types and a range of purity grades to meet your specific requirements.
Unsurpassed filtration quality
In-house expertise
Because filtration is so important, Atlas Copco’s dedicated engineering team works in close collaboration with universities, regulatory authorities and premium filter material suppliers. Our scientists and engineers are therefore knowledgeable on the latest advances and innovations in the industry. Every step of the engineering process is meticulously executed, from basic research to prototype designs and end-of-life analysis.
Rigorous quality control
To ensure top performance and reliability, all Atlas Copco filters are subjected to rigorous internal and external certification and quality control. Thanks to our testing facility, we conduct all certification in-house, including testing witnessed by independent parties. Capable of testing filters according to all relevant standards and under real-life conditions, our competence continues to grow with every new development in the filtration business.
Engineered and built in Europe
Our entire filter range is designed and produced in Atlas Copco’s European facilities, using state-of-the art production lines and quality controls. This geographic proximity allows us to keep R&D, engineering, production, and testing close together and streamline their collaboration.
Atlas Copco’s filters are certified to meet the following ISO standards:
- ISO 8573-1:2010: Compressed air – Contaminants and purity classes
- ISO 8573-2:2018: Compressed air – Test method for oil aerosol content
- ISO 8573-4:2019: Compressed air – Test method for particles
- ISO 8573-5: 2001: Compressed air – Test method for oil vapor and organic solvent content
- ISO 12500-1:2007: Filters for compressed air – Test methods – Oil aerosols
- ISO 12500-2:2007: Filters for compressed air – Test methods – Oil vapors
- ISO 12500-3:2009: Filters for compressed air – Test methods – Particulates
Complete Filtration
Dirt, water and oil are no match for Atlas Copco’s filters. They are designed to remove one or more of the following contaminants:
- DIRT: dust, solid particles, rust particles and micro-organisms.
- WATER: condensed liquid water, water aerosols, acidic condensates.
- OIL: liquid oil, oil aerosol & hydrocarbon vapor.
A solution for every application
Depending on point of use and application, different compressed air purities might be needed. The table below shows the various ISO 8573-1:2010 air purity classes and the Atlas Copco filter and dryer-combinations that meet these classes.
| ISO 8573-1:2010 class | Solid particles | Water | Oil (aerosol, liquid, vapor) |
|
|---|---|---|---|---|
| Wet conditions | Dry conditions | |||
| 0 | SMT-G* | As specified by the customer** | Oil-free compressor | |
| 1 | DD+ & PD+ UD+ |
DDp+ & PDp+ | Desiccant dryer | DD+ & PD+ & QD+/QDT UD+ |
| 2 | DD+ | DDp+ | Desiccant dryer, rotary drum dryer | DD+ & PD+ UD+ |
| 3 | DD+ | DDp+ | Desiccant dryer, membrane dryer, rotary drum dryer | DD+ |
| 4 | DD+ | DDp+ | Membrane dryer, refrigerant dryer | DD+ |
| 5 | DD+ | DDp+ | Membrane dryer, refrigerant dryer | - |
| 6 | - | - | Membrane dryer, refrigerant dryer | - |
* For more details, please refer to the Atlas Copco process gas filtration brochure.
** Please contact your Atlas Copco sales representative.
Examples of typical installations
| A | Compressor - UD+ | Air purity class ISO 8573-1:2010 [1:-:2] |
| B | Compressor - UD+ - Refrigerant dryer | Air purity class ISO 8573-1:2010 [1:4:2]* |
| C | Compressor - UD+ - Refrigerant dryer - QDT - DDp+ | Air purity class ISO 8573-1:2010 [2:4:1] |
| D | Compressor - UD+ - Desiccant dryer - DDp+ | Air purity class ISO 8573-1:2010 [2:2:2] |
| E | Compressor - UD+ - Desiccant dryer - QDT - DDp+ - PDp+ | Air purity class ISO 8573-1:2010 [1:2:1] |
1.) Compressor
2.) UD+ filter
3.) Refrigerant dryer
4.) Desiccant dryer
5.) DDp+ filter
6.) PDp+ filter
7.) QDT filter
Particle class 1 is reached directly after UD+. As downstream piping & vessels can add particles, it is advised to install particle filters DDp+ and PDp+ just before the application to reach particle class 1 at point of use.
The compressor should be equipped with a liquid water separation system such as an aftercooler including a drain or a water separator (WSD). If this is not the case, install a water separator in front of a coalescence filter. For critical applications, install extra air treatment products at the point of use for the removal of pipeline contamination and condensation.
Options DD+/PD+/UD+/DDp+/PDp+/QD+
- Smart indicator.
- External wiring for smart indicator.
- Potential-free alarm for gauge.
- Filter connection kit.
- Wall mounting kit.
- Mechanical drain WD 80.
- Zero-loss electronic drain (IWD).
| Filter size with or without inPASS™ | Nominal capacity | Reference pressure | Maximum pressure | Connections | Dimensions | Free space for cartridge replacement | Weight | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| l/s | cfm | bar(e) | psig | bar(e) | psig | G | NPT | A mm | inch | B mm | inch | C mm | inch | D mm | inch | kg | lbs | |
| 7+ | 7 | 15 | 7 | 102 | 16 | 232 | G 1/2 | NPT 1/2 | 106 | 4.17 | 90 | 3.54 | 362.6 | 14.3 | 90 | 3.54 | 1.18 | 2.60 |
| 15+ | 15 | 32 | 7 | 102 | 16 | 232 | G 1/2 | NPT 1/2 | 106 | 4.17 | 90 | 3.54 | 362.6 | 14.3 | 90 | 3.54 | 1.24 | 2.73 |
| 25+ | 25 | 53 | 7 | 102 | 16 | 232 | G 1/2 | NPT 1/2 | 106 | 4.17 | 90 | 3.54 | 415.1 | 16.3 | 90.5 | 3.56 | 1.45 | 3.20 |
| 45+ | 45 | 95 | 7 | 102 | 16 | 232 | G 3/4 | NPT 3/4 | 135 | 5.31 | 110 | 4.33 | 442.6 | 17.4 | 110 | 4.33 | 2.35 | 5.18 |
| 75+ | 75 | 159 | 7 | 102 | 16 | 232 | G 1 | NPT 1 | 135 | 5.31 | 110 | 4.33 | 527.6 | 20.8 | 110 | 4.33 | 2.8 | 6.17 |
| 110+ | 110 | 233 | 7 | 102 | 16 | 232 | G 1 1/2 | NPT 1 1/2 | 175 | 6.89 | 143 | 5.63 | 559.1 | 22.0 | 130.5 | 5.14 | 5.4 | 11.91 |
| 145+ | 145 | 307 | 7 | 102 | 16 | 232 | G 1 1/2 | NPT 1 1/2 | 175 | 6.89 | 143 | 5.63 | 629.1 | 24.8 | 130.5 | 5.14 | 5.93 | 13.08 |
| 180+ | 180 | 381 | 7 | 102 | 16 | 232 | G 1 1/2 | NPT 1 1/2 | 175 | 6.89 | 143 | 5.63 | 699.1 | 27.5 | 130.5 | 5.14 | 6.45 | 14.22 |
| 240+ | 240 | 509 | 7 | 102 | 16 | 232 | G 2 | NPT 2 | 222 | 8.74 | 171 | 6.73 | 729.6 | 28.7 | 175 | 6.89 | 9.54 | 21.04 |
| 300+ | 300 | 636 | 7 | 102 | 16 | 232 | G 2 1/2 | NPT 2 1/2 | 222 | 8.74 | 171 | 6.73 | 822.6 | 32.4 | 175 | 6.89 | 10.43 | 23.00 |
| Standard | |||||||
| Drain | Depressurizing valve (for DDp+/PDp+/QD+) | x | x | x | x | x | x |
| Floater drain (for DD+/PD+/UD+) | x | x | |||||
| Electronic drain EWD (for DD+/PD+/UD+) | x | ||||||
| Indicator (excl. QD+) | Pop-up indicator | size 7-25 | size 7-25 | ||||
| Gauge | size >25 | size >25 | |||||
| Smart indicator | x | x | x | x | |||
| Bypass | x | x | |||||
| Options | |||||||
| Smart indicator | x | x | |||||
| External wiring for smart indicator | x | x | x | x | x | x | |
| Potential-free alarm for gauge | size >25 | size >25 | |||||
| Filter connection kit | x | x | x | x | |||
| Wall mounting kit | x | x | x | x | |||
| Mechanical drain WD 80 | x | ||||||
| Electronic drain EWD | x | x | |||||
Correction factors
When working with other pressures than the nominal pressure, the actual FAD capacity is calculated by multiplying the correction factor with the rated AML capacity. The calculated actual flow capacity corresponds to the AML-stated pressure drop.
| Working pressure in bar(g) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 10 | 12 | 14 | 16 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Correction factor | 0.38 | 0.53 | 0.65 | 0.75 | 0.83 | 0.92 | 1 | 1.06 | 1.20 | 1.31 | 1.41 | 1.50 |
Temperature correction factors QD+
At higher temperatures, more compressor oil evaporates. When the actual working air inlet temperature differs from the reference, divide the filter capacity by the corresponding correction factors to obtain the correct capacity.
| Inlet temperature °C | 20 | 25 | 30 | 35 | 40 | 45 | 50 | 55 | 60 |
|---|---|---|---|---|---|---|---|---|---|
| Inlet temperature °F | 68 | 77 | 96 | 95 | 104 | 113 | 122 | 131 | 140 |
| Correction factor oil-free | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Correction factor oil-lubricated | 1 | 1 | 1 | 1.2 | 1.5 | 1.7 | 2.1 | 2.4 | 2.6 |
Some environmental or process aspects could cause a higher amount of hydrocarbons or other volatile organic compounds in the compressed air. Contact Atlas Copco when higher concentrations can be expected.
QDT Series
Activated carbon towers for optimal
oil vapor filtration The high-efficiency activated carbon tower is capable of removing hydrocarbons, odors and oil vapor from compressed air. The activated carbon will, through adsorption, reduce the residual oil content to lower than 0.003 mg/m³. The pressure drop is low and stays minimal during the filter’s lifetime.
Your benefits:
- Maximum oil vapor removal Superb activated carbon material.
- Low pressure drop – Optimal internal flow path.
- High reliability – The QDT’s robust design and rigorous quality control of the activated carbon optimize filter reliability.
- Long service intervals – The high volume of activated carbon material ensures a long lifetime, even in very harsh working conditions.
Options
- Oil indicator ensures pure air.
- Wall mounting kit for easy installation (20-185 l/s).
- Heavy-duty filling for extreme oil load (425-1800 l/s).
- PDp+ post-filter including interconnection pipe (425-1800 l/s).
| QDT | |
|---|---|
| Contaminant | Oil vapor |
| Test method | ISO 8573-5:2001, ISO 12500-2:2007 |
| Maximum oil carry-over (mg/m³)* | 0.003 |
| Average dry pressure drop (mbar) |
125 (QDT 20-310) 72 (QDT 425-1800) |
| Element service |
After 4,000 operating hours or 1 year (up to QDT 310) After 8,000 operating hours or 1 year (from QDT 425) After 12,000 operating hours or 1 year (heavy-duty option) |
| Precede with |
Water separation UD+ or DD+/PD+ Dryer |
* After UD+ or DD+/PD+.
Sizing & Dimensions
| Filter size | Nominal capacity | Connections G or NPT in |
Dimensions | Weight | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| l/s | cfm | mm (A) | in (A) | mm (B) | in (B) | mm (C) | in (C) | kg | lbs | ||
| 20 | 20 | 42 | 1/2 | 490 | 19 | 223 | 9 | 190 | 7 | 7 | 22 |
| 45 | 45 | 95 | 1 | 715 | 28 | 223 | 9 | 190 | 7 | 15 | 33 |
| 60 | 60 | 127 | 1 | 840 | 33 | 223 | 9 | 190 | 7 | 18 | 40 |
| 95 | 95 | 210 | 1 | 715 | 28 | 387 | 15 | 190 | 7 | 29 | 64 |
| 125 | 125 | 265 | 1 1/2 | 840 | 33 | 387 | 15 | 190 | 7 | 34 | 75 |
| 150 | 150 | 318 | 1 1/2 | 715 | 28 | 551 | 22 | 190 | 7 | 42 | 93 |
| 185 | 185 | 392 | 1 1/2 | 840 | 33 | 551 | 22 | 190 | 7 | 50 | 110 |
| 245 | 245 | 519 | 1 1/2 | 840 | 33 | 715 | 28 | 190 | 7 | 67 | 148 |
| 310 | 310 | 657 | 1 1/2 | 840 | 33 | 879 | 35 | 190 | 7 | 84 | 185 |
| 425 | 425 | 901 | DN 80 3" | 2148 | 85 | 710 | 28 | 600 | 24 | 264 | 581 |
| 550 | 550 | 1165 | DN 80 3" | 2190 | 86 | 710 | 28 | 670 | 26 | 302 | 664 |
| 850 | 850 | 1801 | DN 100/4" | 2320 | 91 | 724 | 29 | 805 | 32 | 391 | 860 |
| 1100 | 1100 | 2331 | DN 100/4" | 2450 | 97 | 934 | 37 | 820 | 32 | 602 | 1324 |
| 1800 | 1800 | 3814 | DN 150/6" | 2612 | 103 | 1046 | 41 | 980 | 39 | 882 | 1940 |
Correction Factors
For other compressed air inlet temperatures, divide the filter capacity by the following correction factor (Kt):
| Inlet temperature °C | 10 | 15 | 20 | 25 | 30 | 35 | 40 | 45 | 50 | 55 | 60 | 65 | 70* | 75* | 80* |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Inlet temperature °F | 50 | 59 | 68 | 77 | 96 | 95 | 104 | 113 | 122 | 131 | 140 | 149 | 158 | 167 | 176 |
| Correction factor oil-free | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Correction factor oil-lubricated | 1 | 1 | 1 | 1 | 1 | 1 | 1.2 | 1.5 | 1.7 | 2.1 | 2.4 | 3 | 3.5 | 4.1 | 4.9 |
For other compressed air inlet temperatures, divide the filter capacity by the following correction factor (Kt):
| Inlet pressure bar | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Inlet pressure psi | 44 | 58 | 73 | 87 | 102 | 116 | 131 | 145 | 160 | 174 | 193 |
| Correction factor | 0.57 | 0.77 | 0.83 | 1 | 1 | 1 | 1 | 1.05 | 1.05 | 1.11 | 1.18 |
UD+ & QDT: the Winning Combination
| Inlet temperature °C | 10 | 15 | 20 | 25 | 30 | 35 | 40 | 45 | 50 | 55 | 60 | 65 | 70* | 75* | 80* |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Inlet temperature °F | 50 | 59 | 68 | 77 | 96 | 95 | 104 | 113 | 122 | 131 | 140 | 149 | 158 | 167 | 176 |
| Correction factor oil-free | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Correction factor oil-lubricated | 1 | 1 | 1 | 1 | 1 | 1 | 1.2 | 1.5 | 1.7 | 2.1 | 2.4 | 3 | 3.5 | 4.1 | 4.9 |
| UD+ | QDT |
|---|---|
| Liquid oil & oil aerosol removal | Oil vapor removal |
| Guaranteed 0.0009 mg/m³ aerosol and liquid | Guaranteed 0.003 mg/m³ vapor |
| 40% pressure drop reduction compared to DD+/PD+ | 65% pressure drop reduction compared to previous QDT |
| 50% footprint reduction | Extremely compact compared to vessel designs |
Certified filter trains
| Filter train | Purity class according to ISO 8573-1:2010 | Certified |
|---|---|---|
| UD+ - QDT - DDp+ | [2:-:1] | yes |
| UD+ - QDT - DDp+ PDp+ | [1:-:1] | yes |