The Innovative, Effective Solution to Coolant and Wastewater Filtration - Utilising a "True Permanent Media"
Herding GmbH Filtertechnik has introduced together with the Monlan Group next generation of filter aid free "Permanent Medium Filtration". The new Delta Force Filtration? system eliminates disposal media and reduces the costs of operation. Applications for this new filter include general machining and grinding for individual machines or central systems, and wash water filtration.
The Delta Force Filtration system provides a constant dependable flow of clean process Fluid back to the machine. These Filters utilise a vacuum system to draw dirty process Fluid through the Herding? Permanent Filter element. Customers will see a reduction in their maintenance and operation costs by eliminating media change out and disposal media purchase. With no media to dispose of and no filter aid disposal, waste hauling charges will be reduced.
Features
- Permanent back flushable media Eliminates maintenance and disposal media costs
- Back flushes with clean process Fluid no additional Fluids or large volume of air is required
- Integral drag out system for removal of solids
- Removal of particulate down to 10 Micron level
- Flow rate nominal 80 l per LPM per m2 filter area
- 100 % filtration - no bypassing of solids or cake build up is necessary to maintain 10 Micron filtration level
Benefits
- Tramp Oils do not effects process flow rate
- Cleaner Fluids results in longer tool life, fewer wheel dressings, better surface finishes, higher production rates and improved housekeeping
- Eliminates the disposal media and filter aid waste stream adhering to ISO EN 14001

System Operation
The dirt laden liquid enters the system via gravity or transfer pump flowing into the receiving tank where The filtration process takes place. Located in the process tank are manifolds of Herding Permanent Media Filter elements. The process Fluid is drawn through these sintered plastic elements, collecting the particles on the filter element surface. When the system vacuum switch reaches its set point, a back flushing cycle is initiated. A series of actuated valves along with a back flushing pump will clean each filter in series without interrupting the clean flow back to the machining Centres.
Filter Tank
The tankage is composed of two (2) sections. The Receiving tank contains the filter elements and drag out Conveyor system. The regeneration tank acts as the Reservoir from which clean Fluid is drawn during the Back flushing cycle.
Applications
· | All Grinding Applications |
| · | General Machining |
| · | Honing & Gear Cutting |
| · | Wastewater Filtration |
| · | Central Systems |
| · | Retrofit of Existing Systems |
| Sample | Coolant | before Delta Force Filtration Number of Particles 5 Micron Above | After Delta Force Filtration Number of Particles 5 MicronAbove | Effectiveness |
| Machining of Cast | Semi-Synthetic 8% Concentration | 2,681 | 93 | 96,5% |
| Aluminium Brass Chips, Steel Grinding Swarf | Synthetic Coolant 10% Concentration | 3,971 | 210 | 95,0 |
| Aluminium Brass Chips, Steel Grinding Swarf | Semi-Synthetic 5% Concentration | 2,447 | 169 | 93,0 |
*Independent Test Conducted to Verify Published Results