AF 71 G METAL-EDGE FILTER

AUTOMATIC FILTER

AF 71 G METAL-EDGE FILTER

AUTOMATIC FILTER

Suitable for all applications where low or high-viscosity liquids or pastes have to be filtered and homogenised

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  • MECHANICAL

    PROCESSING OIL – COOLANT LUBRICANT – TEST BENCHES

  • HOT MELT

    ADHESIVE TAPES – GLUE

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

CONNECTION SIZE G1, G1 ½

Multiple advantages

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    Extended filter

    Extended filter service life due to the use of a cleanable element

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    No interruption

    Cleaning is possible without interrupting filtration

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    Separation quality

    Precise separation quality in accordance with the metal-edge principle

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    Filter cartridge

    Sturdy filter cartridge made of triangular stainless steel wire on a rugged core element

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    Efficient cleaning

    Efficient filter cleaning assures maximum process stability

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    Long service life

    Solid construction and high-quality materials for a long service life

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    Modular system

    Modular Filtration Group Vario system for optimum filter selection

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    Wide range of applications

    Material variants open up a wide range of applications

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    Application Ex zone

    Application in Ex zone 1 and 2 optional

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    Maintenance

    Easy maintenance

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    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
Element coiled cartridge
  • High wear resistance to abrasive media
  • Sturdy trapezoidal profile for high-viscosity media
  • Welded design
  • Manufactured in stainless steel
Element welded cartridge
AF 71 G operating principle

Technical data

Max. operating pressure:

40 bar, 63 bar
Max. operating temperature:

up to 63 bar max. 200 °C
Cover fastening:

4x M10 hexagon screws
Drive shaft sea:

Square seal ring
Outside coating:

Synthetic resin primer blue acc. to RAL 5007

Connections and nominal diameters:

A-inlet:

G1, G1½
B-outlet:

G1, G1½
C-drain:

G1
Technical data AF 71 G filter
G-indicator:

G1/8
G-Deltap indicator:

DN25 or ANSI 1"
H-heating jacket (optional):

DN20
H-heating jacket (optional):

DN20

Materials:

Housing and cover:

GGG 40
Internals:

nodular cast iron, steel, optional stainless steel
Bearing bushes:

PTFE basis
Seals:

FPM (Viton)
Coiled cartridge:

1.4571 or 1.4571/Al (∆p max. 40 bar)
Welded cartridge:

Welded cartridge: 1.4571 (∆p max. 10 bar)
Technical data AF 71 G filter

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    Performance curves

    AF 71 G efficiency curves

    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.

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