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Wet dust and oil aerosols filtration for optimal protection

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Maximum durability

Lowest pressure drop

8000hr service intervals

Reduces energy cost

Wet dust and oil aerosols filtration for optimal protection

To protect your system from these contaminants, Atlas Copco has developed various top-quality filters that ensure your operation runs smoothly, that the service life of your equipment is maximized and that your end products meet even the most stringent quality standards.

Know your air quality requirements

If you know that a filter from Atlas Copco’s DD+/PD+ or UD+ series is right for you, then check out the below specifications table for more information.

If you are unsure, and only know that you have to protect your system from wet dust and/or oil aerosols, then you need to find out your air quality requirements. For some applications, such as inflating tires, some contaminants in the compressed air do not pose any problems. Others, such as applications in cleanroom environments, require the highest air purity.

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 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  two tables below

DD+/PD+ series

The lubrication of the compressor element or the compressor installation itself can produce oil aerosols, wet dust and water drops that could harm the entire air system. Atlas Copco’s DD+ and PD+ filters efficiently reduce these contaminants and ensure that your system runs more smoothly and efficiently.

These high-performance, oil-coalescing filters are engineered to cost-effectively provide top air purity at a low pressure drop. Thanks to their high-efficiency glass-fiber technology and a coarse 3D-structured layer/barrier, the DD+/PD+ series allows you to meet increasingly stringent air quality demands.

Their stainless-steel cores, epoxy-sealed caps and anti-corrosive coated filter housing make the filters especially reliable.

UD+ series

The UD+ series combines two filtration steps (DD+ and PD+) into a single unique technology that allows you to meet the high quality requirements of various applications while providing ultimate energy savings. However, they do not just save you money, but also space by eliminating the need for a second filter.

At the same time, these two-in-one filters protect your equipment and processes by efficiently reducing oil aerosol, wet dust and water droplets in your compressed air stream.

The UD+ series ensures a lower pressure drop than a conventional filter combination, which results in energy savings. Thanks to the thick filter package, these filters also provide an air purity equal to that obtained by using two separate filters in a row.

With a patented drainage technology, the UD+ series prevents oil droplets from re-entering the air stream.

Performance

 

DD+

PD+

UD+

Contaminant

Oil aerosol/wet dust

Filtration technology

Wrapped

Test method

ISO 8573-2:2018, ISO 12500-1:2007

Maximum oil carry-over (mg/m³)*

0.08*

0.008*

0.001

ISO class 8573-1

[2:-:3]

[1:-:2]

[1:-:2]

Average wet pressure drop (mbar)

119

132

220

Element service

After 8,000 operating hours or 1 year

For flanged filters: after 4,000 operating hours or 1 year or 350 mbar pressure drop

Precede with

Water separation

Water separation & DD+

Water separation

Certification

  • ISO 8573-2:2018
  • ISO 12500-1:2007

For more information on the DD+/PD+ and UD+ series, check out our brochure.

For filtering out wet dust and oil aerosols (as well as other contaminants), Atlas Copco also offers the high-pressure H series of filters and its silicone-free SFA series.

Cutting-edge filtration technology

Atlas Copco’s dedicated filtration team is always looking for ways to give you a competitive edge. Our new generation of filters features several innovations that make your filtration system more efficient and its operation easier. Here are just three examples.


Service indicator

To ensure constant air quality, the service indicator allows for an easy check of the filter’s running hours, differential pressure, and the maintenance status. It can even send a remote alert.

inPASS™ bypass

In addition to outstanding filters, you also get 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 to install an expensive external piping bypass, lower operating and energy costs as well as reduced maintenance times.


The ideal filtration technology

DD+/PD+ and UD+ filters use the wrapped technology that is especially effective for wet particles. The wrapped filtration media offer durability in wet and oil-contaminated environments. The patented Nautilus technology of the series combines multiple wrapped layers to ensure constant air quality in the harshest conditions.

DD+/PD+/UD+/DDp+/PDp+/QD+ series

Technical specifications: sizing

Filter size with or without inPASS™

Nominal capacity

Reference pressure

Maximum pressure

Connections

l/s

cfm

bar(e)

psig

bar(e)

psig

G

NPT

7+

7

15

7

102

16

232

G 1/2

NPT 1/2

15+

15

32

7

102

16

232

G 1/2

NPT 1/2

25+

25

53

7

102

16

232

G 1/2

NPT 1/2

45+

45

95

7

102

16

232

G 3/4

NPT 3/4

75+

75

159

7

102

16

232

G1

NPT 1

110+

110

233

7

102

16

232

G 1 1/2

NPT 1 1/2

145+

145

307

7

102

16

232

G 1 1/2

NPT 1 1/2

180+

180

381

7

102

16

232

G 1 1/2

NPT 1 1/2

240+

240

509

7

102

16

232

G 2

NPT 2

300+

300

636

7

102

16

232

G 2

NPT 2

G 2 1/2

NPT 2 1/2

With inPASS™

380+

380

805

7

102

16

232

G 3

NPT 3

425+

425

901

7

102

16

232

G 3

NPT 3

510+

630

1081

7

102

16

232

G 3

NPT 3

Without inPASS™

360+

360

763

7

102

16

232

G 2 1/2

NPT 2 1/2

430+

430

911

7

102

16

232

G 3

NPT 3

525+

525

1112

7

102

16

232

G 3

NPT 3

630+

630

1335

7

102

16

232

G 3

NPT 3

Flanged

Flanged connection

550+F/630+F

550

1165

7

102

16

232

DN 80

850+F/970+F

850

1801

7

102

16

232

DN 100

850+T

850

1801

7

102

16

232

DN 100

1100+F/1260+F

1100

2331

7

102

16

232

DN 100

1100+T

1100

2331

7

102

16

232

DN 100

1400+F/1600+F

1400

2967

7

102

16

232

DN 150

1800+F/2200+F

1800

3814

7

102

16

232

DN 150

2200+F/2400+F

2200

4662

7

102

16

232

DN 150

3000+F/3600+F

3000

6357

7

102

16

232

DN 200

4000+F

4000

8476

7

102

16

232

DN 200

5000+F

5000

10595

7

102

16

232

DN 200

6000+F

6000

12714

7

102

16

232

DN 250

7000+F

7000

14833

7

102

16

232

DN 250

8000+F

8000

16952

7

102

16

232

DN 300

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.

Filter applications

ISO 8573-1:2010 class


Solid particles

Water


Oil (aerosol, liquid, vapor)

Wet conditions

Dry conditions


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

-

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. liquid oil, oil aerosol, hydrocarbon vapor.

dry-dust
Dry dust

micro-organism
Micro organism

oil-aerosol
Oil aerosol

wet-dust
Wet dust

oil-vapor
Oil vapor

Water-drops
Water drops

 

Flanged design
Flanged design
Threaded design
Threaded design
Tower design
Tower design
 

General applications

Name

DDp+

PDp+

DD+

PD+

UD+

QD+

QDT+

Grade

Rough

Fine

Rough

Fine

Ultimate

Basic

Optimal

Contaminant

Dry dust

Oil aerosol/wet dust

Oil vapor

Special applications

Name

H

High-pressure

SFA

Silicone-free

Grade

Rough & fine

Rough & fine

Basic

Rough & fine

Rough & fine

Basic

Contaminant Dry dust Oil aerosol/wet dust Oil vapor Dry dust Oil aerosol/wet dust Oil vapor




Compressed Air Filters - PD+ filter cutaway

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

Filter open green

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