E-book Compressed Air Filters
23 May, 2022
Filters play a crucial role in the proper treatment of compressed air. In this interactive e-book on filters you will learn everything on contaminants and which filters offer you optimal protection.
QD+, QDT Series
Oil vapor filtration for air compressors
QDT and QD+ series - The ideal solution for oil vapor filtration
Oil vapors pose a serious threat to compressed air systems, they can damage air-powered equipment and contaminate end products leading to increased operating costs. Top-quality air filters developed by Atlas Copco can protect your operation and from oil vapor.
- Description
- QD+ series
- QDT series
- Certification
- Air quality requirement
- Specifications
- Benefits
- Downloads
- Additional readings
- Related products
- Services Contact us
Description
If oil vapours enter the compressed air stream, they can damage air-powered equipment and contaminate end products, which can increase the operating costs of businesses significantly.
That is why Atlas Copco has developed a series of top-quality air filters that can protect your operation and your investments from oil vapor. The filters of the QDT and QD+ series can help your equipment last longer and ensure that your end products meet even the most stringent quality standards.
Know your air quality requirements
Knowing your air quality requirements and which standards to comply with will help you select the right air filter, which could lower your investment costs and ensure that you get the most out of your compressed air system.
If you are uncertain which filter to use and only know that you have to protect your system from oil vapor, then you first have to find out your air quality requirements. For some applications, oil vapor in the compressed air stream does not pose a problem, for example inflating tires. In cleanroom environments, on the other hand, these vapors must be filtered out before they contaminate sensitive end products.
If you are not sure which ISO standard applies to your operation or which type of contaminant you have to protect your system from, you can contact Atlas Copco or consult the tables below.
QD+ series
QD+ series
The macro-structured activated carbon of Atlas Copco’s QD+ series will reduce the residual oil content through adsorption to less than 0.003 mg/m³. In addition, it offers a low pressure drop that remains constant during the lifetime of the filter.
QD+ filters not only ensure a maximum oil vapor removal but also minimal dust release. They minimize operating costs and are extremely reliable thanks to stainless-steel cores, epoxy-sealed caps and a filter housing with anti-corrosive coating.
The filters of the QD+ series are also easy to maintain, which lowers your operating costs further. The push-in element and drain connection were designed for effortless replacement. The service indicator shows (preventive) maintenance alerts.
QD+ performance
| QD+ | ||
| Contaminant | Oil vapor | |
| Filtration technology | Macro-structured activated carbon | |
| Test method | ISO 8573-5:2001 | |
| Maximum oil carry-over (mg/m³)* | 0.003* | |
| ISO class 8573-1 | [2:-:1] | |
| Average dry pressure drop (mbar) | 75 | |
| Element service | After 2,000 operating hours or 1 year | |
| For flanged filters: after 1,000 operating hours or 1 year | ||
| Water separation | ||
| Precede with | UD+ or DD+/PD+ | |
| Dryer | ||
| * In a typical installation with refrigerant dryer and UD+ filter. | ||
QDT series
QDT series
These filters consist of a high-efficiency activated carbon tower that removes oil vapor, hydrocarbons and odors from your compressed air supply. Using adsorption, the activated carbon layers will reduce the residual oil content to lower than 0.003 mg/m³.
Thanks to an optimal internal flow path, the filters of the QDT series also offer a low pressure drop that stays minimal throughout the filter’s lifetime. Their robust design and optimal filter material also make the QDT series highly reliable.
QDT performance
| 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) | ||
| Precede with | Water separation UD+ or DD+/PD+ | |
| Dryer | ||
| * After UD+ or DD+/PD+. | ||
Certification
Certification
QDT series - ISO 8573-5:2001
Check out the brochure for more information on the QD+ and QDT series.
For filtering out oil vapor (as well as hydrocarbons and odors), Atlas Copco also offers the high-pressure H series of filters and its silicone-free SFA series.
The ideal filtration technology
The QD+ series uses the macro-structured activated carbon technology, which provides a larger surface structure than typical carbon filters. Thanks to its supreme adsorption capacity, it delivers a steady performance over a longer period.
inPASS™ bypass
The QD+ series comes with the revolutionary built-in bypass that allows you to service your filter without disrupting the air flow. To you that means big investment savings by eliminating the need install an expensive external piping bypass, lower operating and energy costs as well as reduced maintenance times.
Service indicator
To ensure constant air quality, the QD+ series features a service indicator for an easy check of the filter’s running hours, differential pressure, and the maintenance status. It can even send a remote alert.
Cutting-edge filtration technology
Atlas Copco’s dedicated filtration team is always looking for ways to give you a competitive edge. The new filter generation features several innovations that make your filtration system more efficient and its operation easier. Here are just three examples.
Air quality requirement
Find the right filter for your application
The table below shows the various ISO 8573-1:2010 air purity classes and the Atlas Copco filters and dryer-combinations that meet these classes.
If you are unsure which ISO class you need but you do know what contaminant you have to protect your system from, then check out the general and special applications tables below. It will provide you with an overview of which Atlas Copco filters are the ideal solution for which contaminant.
| ISO 8573-1:2010 class | Solid particles | Water | Oil | ||
| (aerosol, liquid, vapor) | |||||
| Wet conditions | Dry conditions | ||||
| 0 | As specified by the customer* | Oil-free compressor | |||
| 1 | DD+ & PD+ | DDp+ & PDp+ | Desiccant dryer | DD+ & PD+ | & QD+/QDT |
| UD+ | UD+ | & QD+/QDT | |||
| 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 | - | |
Air contaminants
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, micro-organisms.
- WATER: condensed liquid water, water aerosols, acidic condensates.
- OIL: liquid oil, oil aerosol, hydrocarbon vapor.
Dry dust
Micro organism
Oil aerosol
Wet dust
Oil vapor
Water drops
UD+ & QDT: the winning combination
The Atlas Copco UD+ - QDT filter train meets the requirements of air purity class 1 for total oil, according to ISO 8573-1:2010, in a typical compressed air installation.
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 |
Specifications
If you know that a filter from the QDT or QD+ series is the ideal solution for you, then you can find detailed information on the specifications below.
QD+ series technical specifications
Filter size with or without inPASS™ |
Nominal capacity |
Reference pressure |
Maximum pressure |
Connections |
||||
|---|---|---|---|---|---|---|---|---|
|
l/s |
cfm |
bar(e) |
psig |
||||
7+ |
7 |
15 |
7 |
102 |
||||
15+ |
15 |
32 |
7 |
102 |
||||
25+ |
25 |
53 |
7 |
102 |
||||
45+ |
45 |
95 |
7 |
102 |
||||
75+ |
75 |
159 |
7 |
102 |
||||
110+ |
110 |
233 |
7 |
102 |
||||
145+ |
145 |
307 |
7 |
102 |
||||
180+ |
180 |
381 |
7 |
102 |
||||
240+ |
240 |
509 |
7 |
102 |
||||
300+
|
300 |
636 |
7 |
102 |
||||
With inPASS™ |
||||||||
380+ |
380 |
805 |
7 |
102 |
||||
425+ |
425 |
901 |
7 |
102 |
||||
510+ |
630 |
1081 |
7 |
102 |
||||
Without inPASS™ |
||||||||
360+ |
360 |
763 |
7 |
102 |
||||
430+ |
430 |
911 |
7 |
102 |
||||
525+ |
525 |
1112 |
7 |
102 |
||||
630+ |
630 |
1335 |
7 |
102 |
||||
Flanged |
|
|
|
|
||||
550+F/630+F |
550 |
1165 |
7 |
102 |
||||
850+F/970+F |
850 |
1801 |
7 |
102 |
||||
850+T |
850 |
1801 |
7 |
102 |
||||
1100+F/1260+F |
1100 |
2331 |
7 |
102 |
||||
1100+T |
1100 |
2331 |
7 |
102 |
||||
1400+F/1600+F |
1400 |
2967 |
7 |
102 |
||||
1800+F/2200+F |
1800 |
3814 |
7 |
102 |
||||
2200+F/2400+F |
2200 |
4662 |
7 |
102 |
||||
3000+F/3600+F |
3000 |
6357 |
7 |
102 |
||||
4000+F |
4000 |
8476 |
7 |
102 |
||||
5000+F |
5000 |
10595 |
7 |
102 |
||||
6000+F |
6000 |
12714 |
7 |
102 |
||||
7000+F |
7000 |
14833 |
7 |
102 |
||||
8000+F |
8000 |
16952 |
7 |
102 |
||||
QD+ series - Correction factors
| 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 | 1.2 | 1.31 | 1.41 | 1.5 |
QDT series technical specifications
| Filter size | Nominal capacity | Connections G or NPT | |
| l/s | cfm | in | |
| 20 | 20 | 42 | 1/2 |
| 45 | 45 | 95 | 1 |
| 60 | 60 | 127 | 1 |
| 95 | 95 | 210 | 1 |
| 125 | 125 | 265 | 1 1/2 |
| 150 | 150 | 318 | 1 1/2 |
| 185 | 185 | 392 | 1 1/2 |
| 245 | 245 | 519 | 1 1/2 |
| 310 | 310 | 657 | 1 1/2 |
| 425 | 425 | 901 | DN 80 3" |
| 550 | 550 | 1165 | DN 80 3" |
| 850 | 850 | 1801 | DN 100/4" |
| 1100 | 1100 | 2331 | DN 100/4" |
| 1800 | 1800 | 3814 | DN 150/6" |
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.
QDT series - 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 QDT flanged only. | |||||||||||||||
For other compressed air inlet pressures, multiply the filter capacity by the following correction factor (Kp):
| 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 |
Benefits
Technical benefits
Maximum oil vapor removal
Measuring air purity
Easy maintenance
Energy savings
Downloads
Additional readings
Interactive ebooks
Guide Air Treatment
5 June, 2022
In this guide you will learn everything you need to know on air treatment. From different types of contaminants to knowing your air quality requirements; this guide covers all important air treatment topics.