UD+ Filters


Reduce Cost, Protect, and Maintain System Performance.

Two-in-one filtration with supreme energy savings

Atlas Copco’s UD+ oil coalescing filters efficiently reduce oil aerosol, wet dust and water drops in your compressed air stream to protect your investment, equipment and processes. The UD+, combines two filtration steps (DD+ and PD+) into one, a unique technology to meet the high-quality requirements of diverse applications and provide ultimate energy savings.

UD+ Filters are suitable for flow rates up to 1165 cfm @ 100 psi and are available with threaded connections ranging from 3/8” to 3”.

40% Energy Savings

A 40% lower pressure drop than the conventional filter combination results in 40% higher energy efficiency.

Pure Air

Air purity is equal to that obtained using two filters in line, thanks to the thick filter package of UD+ filters.

Save Space

The two-in-one filtration concept reduces installation space and complexity, making UD+ filters particularly suitable for applications where space is at a premium.

Save Money

Install UD+ filters to enjoy significant cost savings compared to conventional filters.

Call 800-289-2224 - Quote - Install

Features and Benefits

Suitable for Most Industries

The UD+ filter is designed for most industries with a compressed air system*.  

*Flow rates up to 1165 cfm @ 100 psi and are available with threaded connections ranging from 3/8” to 3”.

Protection, No Matter the Manufacturer

The UD+ filter is compatible with all compressor and dryer manufacturers. Its purpose is to protect the dryer and downstream equipment and tools from moisture, oil vapors, and other contaminants that may come out of the compressor and dryer.

Solve Problems and Get Results

  • Eliminate problems caused by moisture or water, oil and particulates from your air system
  • Increase uptime
  • Realize cost savings with a two-in-one filter construction
  • Less pressure drops
  • Protect down-the-line equipment
  • Easy replacement

Brandon and Clark, Your Full Service Provider

  • Air system design
  • Air pipe installation
  • Filter installation
  • Air Compressor sales, service and repair
  • Routine maintenance service contracts available


Combining the coalescing performance of a DD+ and a PD+ filter installed in series into a single filter that has 40% less pressure drop than the 2 individual items

Filter rating Type Liquid ppm (part per million) Particles micron ISO class
UD+ Submicronic 0.01 0.01 1:-:2

Installation Examples

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]

* 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 after cooler including a drain or a water separator (WSD). Always install a water separator in front of a coalescence filter. In case of critical applications, install extra air treatment products at point of use for the removal of pipeline contamination and condensation.

Images Courtesy of Atlas Copco

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800-289-2224 - compressors@brandonclark.com

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