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Dryflo®

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.
Dryflo Mist Collector Filter Changeout
  • 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

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.

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

Dryflo First and Second Stage Filters

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.

Dryflo Third Stage Filter

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.


See 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.

Average Efficiency of Dryflo on Soluble Oil and Synthetic Fluid
Droplet Size Dryflo Collector with HEPA Dryflo Collector without HEPA
1.8 micron 100% 98%
3.2 micron 100% 100%
Collector Design Standard Optional
Mild Steel Construction  
Inlet Gasket  
Inlet Collar  
Inlet Hopper with Legs  
Inlet Hopper with Vibration Isolators  
Inlet Hopper with Flex-Duct  
Inlet Hopper with Impact Separator  
Machine Mount  
Ceiling Mount  
Collector Stand or Cart  
Junction Box  
Drain Collection Container  

 

Cartridge Filters Standard Optional
First-Stage Wire Mesh  
Variety of Other Prefilters  
High Efficiency First-Stage  
Dryflo Cartridge Filter with Wrap  
Fourth-Stage HEPA Filter  
Fourth-Stage 95% DOP Filter  

 

Paint System Standard Optional
Prime Coated Interior  
Textured Multi-Coat Paint Finish with 2,000-Hour Salt Spray Performance  
Custom Paint Colors  
Premium Duty Coating    

 

Electrical Controls, Gauges, and Enclosures Standard Optional
Minihelic* Pressure Gauge  
Manual Motor Starter  
Type 12 (NEMA & UL) Motor Starter  
Remote Start/Stop  
Machine Tool Interlock  
Mounted and Prewired Motor Starters  

 

Warranty Standard Optional
10-Year Warranty  
* Minihelic is a registered trademark of Dwyer Instruments, Inc.

Q. What Size Are Mist Droplets/Particles?

A. Mist can generally be defined as a liquid droplet 20 microns in diameter or smaller. Oil-based fluids typically produce mist droplets that range from 0.5 microns to 10 microns. A smoke droplet is typically smaller, from 0.07 microns to 1 micron, and is a solid or liquid aerosol.


Q. What Determines the Performance of a Mist Collector?

A. A mist collector can be characterized by pressure drop, efficiency, and flow rate. Pressure drops affects the energy required to pull the airflow through the system. The efficiency of the system determines how clean the air will be as it leaves the collector and flow rate determines how much air will be cleaned.