Filter elements made from woven wire cloth laminated panels

HAVER POROSTAR® - filter elements

Metal wire mesh laminated panels: stable, precise, custom-made

POROSTAR® filter elements made from metal wire mesh laminated panels consist of a large number of wire mesh layers that are firmly bonded together by diffusion. After initial heat treatment, the mesh laminates are sintered a second time. This duo-sintering technique leads to a firm connection of the layers.

Diverse areas of application

As a filter medium, HAVER POROSTAR® enables you to achieve foreign particle-free filtration in the range < 1 µm to 200 µm. No particles come loose, even at the maximum operating pressure.

Metal wire mesh laminated panels / mesh laminates are used as filter cartridges, in centrifuges and nutsche filter systems. HAVER POROSTAR® has proven itself for solid-liquid filtration and hot gas filtration in the following industries:

  • Chemistry and petrochemistry
  • Pharmaceutical industry
  • Plastics industry
  • Food industry
  • Automotive industry
  • Mechanical engineering, etc.
Top of three Porostar patterns
Underside of three Porostar patterns

Duo sintering technology

This is how strong connections are made

The duo-sintering technology results in the diffusion of all wires in contact with each other without changing the geometric structure of the individual cloth layers. The result is a stable, porous filter medium with characteristics that can be determined in advance:

  • Pore size
  • Pore distribution
  • Porosity
  • Permeability

The mesh layers are put together in such a way that they optimally meet your filtration requirements. HAVER POROSTAR® can be formed and welded. We can also connect the mesh laminates with additional support materials such as perforated metal sheets.

Description Description Description
Cross-section of the POROSTAR® STANDARD, 5 layers

Formats and materials

We manufacture HAVER POROSTAR® in sheet formats in the standard format 1,200 mm x 1,200 mm up to a maximum of 1,520 mm x 1,900 mm or 1,400 mm x 2,050 mm without a weld seam.

We use modern welding methods to join the panels to create the desired larger formats. For example, filter plates with diameters larger than 1,200 mm or filter cylinders larger than 400 mm in diameter are produced.

The material used is mainly chrome-nickel-molybdenum steel, 1.4404 = AISI 316-L. Various special alloys are also used.

Customised constructions according to requirements

HAVER POROSTAR® are available in the STANDARD version as well as in the special versions LIGHT, HIFLO and COMBI. Versions up to 10 mm thick are already successfully in use.

POROSTAR standard

is used in filter plates and cylinders. It consists of five or six mesh layers and is particularly suitable for one-sided loads.


is suitable for the production of pleated filter cylinders or filter discs with the smallest diameter, e.g. 2.5 mm. It consists of three layers of fabric.


is particularly suitable for screening and filtering processes with minimised differential pressures due to its high flow rate. All fabric layers have square mesh openings.


is suitable for the highest differential pressure load, even in counterflow. In this process, the metal wire mesh and perforated plate are joined together by sintering to form a single unit. POROSTAR-COMBI is available in a STANDARD version as well as in the special versions LIGHT or HIFLO. The number of mesh layers and the thickness of the perforated plate are variable.


HAVER POROSTAR® can be welded and formed into customised filter media.
The welding competence at Haver & Boecker is certified according to DIN EN 1090 and DIN EN ISO 3834-2.

Do you have any questions?
I will be happy to help you:
Sven Lohmann
Head of Business Unit
Wire Weaving Division
Ennigerloher Str. 64
59302 Oelde, Germany