Dryflo® Mist Collector

Compact, Machine-Mountable Mist Collection

Donaldson Dryflo Mist Collector hero image | AIRPLUS Industrial

Dryflo mist collectors are effective & efficient mist filtration solutions to reduce work environment coolant & machining oil mists in a machine-mountable package.

Dryflo® Mist Collectors

Dryflo® mist collectors from Donaldson Torit® are effective and efficient mist filtration solutions, providing a more productive work environment by reducing coolant and machining oil mists in a machine-mountable package. The Dryflo provides high performance technology and easy, predictable maintenance.


  • High performance three-stage filtration improves collection efficiency at every stage
  • Provides a cleaner work environment for maximum productivity
  • Reduces risk of mist related hazards
  • Quick and easy filter changes—workers have minimal contact with collected oil
  • Predictable maintenance with a differential pressure gauge
  • Lower plant maintenance costs
  • Mounts directly onto a machining center to collect oil, water-soluble, semi-synthetic and synthetic coolant
  • Low profile
Donaldson Dryflo Mist Collector filter changeout | AIRPLUS Industrial
Dryflo Mist Collector filter changeout

Normal Operation

Donaldson Dryflo Mist Collector Normal Operation | AIRPLUS Industrial
Dryflo Mist Collector Normal Operation

Dryflo Filter Media

Dryflo filter media is made from proprietary synthetic media incorporating both small and large fibers for optimum filtration. The smaller fibers provide increased filtration efficiency; after mist is captured and coalesced, the larger fibers allow the oil to drain from the filter. The media also incorporates a proprietary corrugation method which maintains uniform airflow and lower pressure while the media is saturated with oil.

Donaldson Dryflo Mist Collector Filter Media Closeup | AIRPLUS Industrial
Dryflo Mist Collector Filter Media Closeup

High Performance Three-Stage Filtration

High-Performance Three-Stage Filtration Improves Collection Efficiency at Every Stage

First Stage

A prefilter that removes larger mist droplets, metal dust and swarf captured by the collector. Wire mesh thin screen and polypropylene mesh are available.

Second Stage

A three-layer wrap of synthetic high-loft material collects small mist drops into larger oil droplets, which drain out of the mist collector.


Donaldson Dryflo Mist Collector First & second stage filters | AIRPLUS Industrial
Dryflo Mist Collector First & second stage filters

Third Stage

Collects, coalesces and drains the finer mist droplets generated by metalworking applications. Along with vertically oriented pleats, the third-stage filter cartridge incorporates the Pleatloc™ media spacing system, which enhances drainage and provides a lower pressure drop, higher filtration efficiency and less re-entrainment of collected mist.

Donaldson Dryflo Mist Collector third stage filters | AIRPLUS Industrial
Dryflo Mist Collector third stage filters

Dryflo® Mist Filters

Long Lasting Efficiency

The Dryflo cartridge is a proven, highly efficient mist filter that actually increases efficiency over time when collecting soluble oil or synthetic fluid. In tests conducted by the University of North Carolina (UNC), the Dryflo was shown to offer increased efficiency over time, resulting in longer HEPA filter life and reduced HEPA filter replacement costs.

Gauging Efficiency

Using UNC’s protocol for evaluating the cartridge efficiency, Dryflo mist collectors with HEPA final filter are a reliable, high performance filtration solution. To prolong HEPA filter life, the upstream filter stages must also be highly efficient. HEPA life depends on the cumulative loading it receives, which in turn, depends on the performance of the upstream collection stages.

Evaluating efficiency as a function of droplet diameter and pressure drop over 14 days, UNC protocol determines the size distribution of droplets generated during a variety of wetmachining operations. Droplet sizes ranging from 1.8 micron to 3.2 micron were tested to determine the average efficiency of Dryflo collectors on soluble oil and synthetic fluid.


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Choosing the Right Mist Collector for Your Facility

Choosing the proper mist-collection system for your application is dependent upon many factors. AIRPLUS Industrial has 30+ years of experience in designing, sourcing, installing and maintaining mist collection systems, we can help you choose the right system for your facility.