Automatic Vacuum Filter Systems

The Eriez HydroFlow® Vacuum Filter is a fully automatic filtration system specifically designed for the metal working industry

Automatic Vacuum Filter Systems

Proven Throughout the Years –
Vacuum Filter Performance for the Machine Tool Industry

Committed to continuous improvement, still out ranks all other Vacuum Filtration Systems in the market.

Filtration to 10 Microns,
Flow Rates to 2000 GPM

HydroFlow’s commitment to continuous improvement has brought the conventional vacuum filter design to its highest level of performance and reliability. The filter is designed for continuous service with minimal operator attention and provides a consistent quality of solids separation, maximum coolant life and increased productivity.

With the addition of our CBN Series, we offer more sizes, types and configurations of Vacuum Filters than any other Filter manufacturer.

The HydroFlow® Rolled Media Vacuum Filter is a fully automatic filtration system that has been simplified and improved through several stages of redesign since its introduction in 1986. It provides positive filtration levels of 10 microns because of an innovative method sealing the filter media to prevent solids by-pass. The filter is designed for continuous service with minimal operator attention and provides a consistent quality of solids separation, maximum coolant life and increased productivity.

Principle of OperationApplications
1.The bottom of the main holding tank is constructed of filter panels of reinforced perforated steel plate to support synthetic filter media.

2.The filter system pump draws fluid though the media and returns it directly to the point of use of machine tools. The pump handles only clean, filtered liquid, which contributes to long pump life and low maintenance.

3.The solids retained on the media surface form a filter cake. As the filter cake deepens, the fluid path becomes restricted, removing finer particulate and increasing efficiency of filtration.

4.When the pressure drop across the media reaches a preselected set point, the automatic regeneration cycle is started.

5.During the regeneration cycle, the vacuum under the media is dissipated, releasing the media. The system pump now draws fluid from the clean regeneration tank.

6.After a short delay, the conveyor “dragout” is activated and advances several inches to carry media and contaminants for disposal. The dirt cake is discharged in a “near-dry” state because the solids remain on the filter inclined ramp for several regeneration cycles during which excess liquid drains back into the dirty holding tank. At the top of the ramp, solids fall into a hopper.

 
The ideal choice for large or small central systems as well as individual machine tools using oil or water based coolants.

Systems are now in operation:
  • Machining
  • Grinding
  • Creep Feed & CBN Grinding
  • Rolling Mills

Of virtually all material, including:
  • Steel & Stainless
  • Aluminum
  • Cast Iron
  • Aircraft Alloys
  • Carbide
  • Composites

 
HydroFlow’s commitment to continuous improvement has brought the conventional vacuum filter design to its highest level of performance and reliability.
   
Vacuum Filter Features  
The HydroFlow® Vacuum Filter provides the following advantages over conventional flat bed pressure filters, cyclonic and precoat pressure filters:
 
Vacuum
Filtration
Eliminates the costly and complex hydraulic or air closure systems required to seal flat bed pressure filters.
Vacuum
Filter Pump
Handles clean coolant only, as it draws the dirty fluid through the media, eliminating the wear associated with pumping dirty coolant.
Packaged SystemThe Vacuum Filter is a packaged system combining a conveyorized dirty tank and filter section in one assembly, eliminating the settling, backflow and balance problems associated with pressure filters.
 
Conveyorized
Dirty Tank
Provides complete removal of solids from the dirty tank and removes settled solids.
Automatic RegenerationA SHORT, AUTOMATIC, REGENERATION allows for the use of a small clean tank to provide UN-INTERRUPTED flow of clean fluid to the point of use. By introducing only a small section of new media into the filter section, the Vacuum Filter eliminates the filtration spikes caused by pressure filters that index the entire filter bed.
Vacuum
Filter
Does not use air for backwash or to dry the solids discharge, eliminating the need for additional air compressors, accumulators or mist collectors.
  
CBN Series

The HydroFlow CBN Series Vacuum Filter is specifically designed to handle heavy oils, aerated by very high pressure (up to 1000 PSI) and the blinding and short cycling associated with CBN machining.

Advantages
  • Special media which increases cycle time in binding applications.
  • Positive displacement air operated filter pumps which are unmatched in performance on highly aerated heavy oils.
  • High flow rates (up to 100 GPM) at High pressures (up to 1000 PSI)
  • Filters available with refrigeration systems mounted on top of the filter.

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