AF 71 H METAL-EDGE FILTER

AUTOMATIC FILTER

AF 71 H METAL-EDGE FILTER

AUTOMATIC FILTER
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CASE STUDY
  • MECHANICAL MARKET

    TEST BENCHES 

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

  • INDUSTRIAL MARKET

    PLASTIC

    Suitable for filtration and homogenization of high viscosity PVC (2000 ÷ 4000 mPa∙s at 40° C), plastic material commonly used in the automotive sector.

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.

The AF 71 H filter have been introduced in the production processes which provide for the filtration and homogenization of high viscosity PVC (2000 ÷ 4000 mPa ∙ s at 40 ° C), plastic material commonly used in the automotive sector.

With radial scraper cleanings

HIGH-PRESSURE DESIGN UP TO 400 BAR

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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    Filter selection

    Optimal filter selection

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    Wide range of applications

    Material variants open up a wide range of applications

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    Maintenance

    Easy maintenance

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    Distribution

    Worldwide distribution

Operating principle

This compact, inline filter system consumes no filter material, which means there is also no need for subsequent disposal. The filter is cleaned automatically, semi-automatically or manually without interrupting operation. 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 (ex Mahle) filter element. The solids are separated on the surface of the triangular filter element 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 (ex Mahle) filter element is rotated against a spring actuated scraper for this purpose. The special gap geometry of the filter element guarantees efficient cleaning.

The particles or agglomerates are skimmed from the surface and settle in the collection cone. The patented filter element bearing (AKF system) prevents high axial forces and facilitates the cleaning process.

The residue that has settled in the collection plenum can be emptied via the drain valve either when the machine is at a standstill or during filtration if there are moderate pessure conditions.

  • 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

Technical data

Max. operating pressure:

400 bar
Max. operating temperature:

100 °C
Drive shaft sea:

Cup seal packing and O-ring
Outside coating:

Synthetic resin primer, blue acc. to RAL 5007

Connections and nominal diameters:

A-inlet:

G1¼
B-outlet:

G1¼
C-drain:

All threaded holes:

acc. to DIN 3852 form X
AF-71H-technical

Materials:

Filter head:

Nodular cast iron 40
Filter bowl:

Ck 15
Internals:

St. 1.4301, nodular cast iron
Bearing bushes:

PTFE based
Seals:

FPM (Viton)
Coiled element:

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

Welded cartridge: 1.4571 (∆p max. 10 bar)
AF-71H-technical

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    Performance curves

    AF-71H-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 indicate the volume flow through the complete filter system (filter housing including element) and are referred to a differential pressure of 0.3 bar. Specific process information is essential to guarantee reliable operation of an automatic filter.

    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.

    Related products

    EWH 16 – Filter maintenance

    TECHNOLOGY: STATIC FILTER
    MARKET: ALL

    APPLICATION: ACCESSORIES, TEST BENCHES, ADHESIVE TAPES, GLUE, PAINTS, PLASTIC, OIL

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    For over 30 years Lubropoint identified alternative industrial solutions dedicated to medium and large industries. To ensure customers the best products in the field of high-performance hybrid technologies and industrial filtrations Lubropoint studies the market carefully.