Suitable for all applications where low or high-viscosity liquids or pastes have to be filtered and homogenised
AF 71 G METAL-EDGE FILTER
AF 71 G METAL-EDGE FILTER
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MECHANICAL
PROCESSING OIL – COOLANT LUBRICANT – TEST BENCHES
HOT MELT
ADHESIVE TAPES – GLUE
MARINE
FUEL
INDUSTRIAL
INK – WATER TREATMENT
Filtration Group (ex Mahle) automatic metal-edge filters are suitable for all applications where low or high-viscosity liquids or pastes have to be filtered and homogenised.
These compact inline filter systems can be designed for semi or fully automatic cleaning. The system is cleaned by rotating the filter cartridge against a spring actuated scraper.
With radial scraper cleanings
Multiple advantages
Extended filter
Extended filter service life due to the use of a cleanable element
No interruption
Cleaning is possible without interrupting filtration
Separation quality
Precise separation quality in accordance with the metal-edge principle
Filter cartridge
Sturdy filter cartridge made of triangular stainless steel wire on a rugged core element
Efficient cleaning
Efficient filter cleaning assures maximum process stability
Long service life
Solid construction and high-quality materials for a long service life
Modular system
Modular Filtration Group Vario system for optimum filter selection
Wide range of applications
Material variants open up a wide range of applications
Application Ex zone
Application in Ex zone 1 and 2 optional
Maintenance
Easy maintenance
Distribution
Worldwide distribution
Operating principle
The Filtration Group (ex Mahle) AF 71 G metal-edge filter belongs to the small Vario series. The Filtration Group metal-edge filter system is used to filter and homogenise a wide range of liquids and pastes. This compact, inline filter system consumes no filter material, which means there is also no need for subsequent disposal. The filter is cleaned either automatically or semi-automatically without interrupting operation. Optional a pneumatical rotary drive is also available. Its advance is given by use with the differential pressure measure and display unit with integrated control funtion PiC 3170 MFC. Autarcic automatic filters can be combined without need of a power station for a 3-phase motor. 24 V DC field voltage and compressed air as auxilliary energy are sufficient. The concentrated solids are drained off simply by opening the system for a short time. The medium to be cleaned is guided into the filter housing under pressure or in suction mode. It flows inward through the Filtration Group filter cartridge. The solids are separated on the surface of the triangular filter cartridge wires. The filtered fluid exits the filter housing at the top opposite the inlet connection. The filter is cleaned either when a preset differential pressure limit is reached or after a specified cycle time elapses. The Filtration Group filter cartridge is rotated against a spring actuated scraper for this purpose. The special gap geometry of the filter cartridge guarantees efficient cleaning. The particles or agglomerates are skimmed from the surface and settle in the collection cone. The patented filter cartridge bearing (AKF system) prevents high axial forces and facilitates the cleaning process. The residue that has settled in the collection cone can be emptied via the drain valve either when the machine is at a standstill or during filtration.
- Optimum cleaning by means of sharp-edged triangular wire
- Large effective filter surface
- Small, precise gap widths
- High differential pressure stability and torsional strength
- Several material combinations possible

- High wear resistance to abrasive media
- Sturdy trapezoidal profile for high-viscosity media
- Welded design
- Manufactured in stainless steel


Technical data
Connections and nominal diameters:

Materials:

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— Viscosity in 1 mm²/s
— Viscosity in 33 mm²/s
— Viscosity in 100 mm²/s
— Viscosity in 500 mm²/s
y = volumetric flow V [l/min]
x = gap width f [µm]
The curves represent the volumetric flow through the entire filter system (filter housing including one filter element as an example) and refer to a differential pressure of 0.3 bar. Specific information about process data is essential for reliable operation of automatic filters.
The curves represent the volumetric flow through the entire filter system (filter housing including one filter element as an example) and refer to a differential pressure of 0.3 bar. Specific information about process data is essential for reliable operation of automatic filters.