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Filter Solutions. Protecting What Matters.

Reliable, corrosion-resistant filter components - engineered to perform in critical environments where purity, pressure and durability are essential.

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Stainless steel sintered filters.

At Sintex we are able to offer a range of stainless steel sintered filters manufactured in accordance with customer specifications.

We have developed both sintering processes and our own materials that enable steel sintered filters to be produced with a wide range of properties

The exploitation of the porosity enables the filters to be used for:

Gas and liquid filtration
Flow control of gases and liquids
Flame traps and explosion protection
Ventilation

Magnetic Filters.

Metallic particles are harmful in food, medicine, fuel or other high-quality products. Customer satisfaction plummets with small fragments from a knife found in crushed nuts, and rust flakes in a fuel tank can harm the motor of any car or other vehicle.

Pipes and pumps can be damaged if magnetic particles flow freely in a closed cooling water system as they typically settle on the rotor or shaft in the pump resulting in internal wear of the circulating pump.

Therefore, magnetic filtration is essential to reach safety for end-users and high-performance equipment.

At Sintex, we develop magnetic filtration systems and we have specialized in filtration of aggressive material in high-end products. We ensure the best removal of metallic parts using high-grade magnets, typically incapsulated in stainless steel.

We are also able to combine stainless mechanical filtration with magnetic filtration to remove even more particles. In the meantime, our best results have always been achieved through close collaboration with our customers, as helping our customers find smart solutions to their problems often results in a more robust design, less use of expensive magnet materials or longer lifetime of the entire system.

Magnetic filtration is also used for separating media, the most well-known example being the separation of malaria from blood. Furthermore, magnetic separation is used in the pharmaceutical industry to produce high-end chemicals, normally via electromagnets. At Sintex, we have developed and built permanent magnet systems that can considerably reduce power-consumption, thereby reduce the total carbon footprint of manufacturing on the customer’s side.

Possibilities.

The variation of pore size and carefully controlled pore distribution are utilised to produce filters that feature a wide range of different applications.

Sintered components’ special property in terms of porosity is utilised to produce filters that do not suffer from the same shortcomings as conventional solutions. The sintering process holds the material together so that stainless steel sintered filters are both stronger and better than conventional filters.

Sintered filters have fine tolerances and considerable geometrical possibilities. For instance, it is often possible to reduce the number of subcomponents and processes in the final filter solution, since a number of the subcomponents can be replaced by a single filter that is compressed in a single process. This avoids further time-consuming machining. The method chosen depends on the proposed application of the filter.

Sintex production of shaft bearing components

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A single component - A single production process.

The wish to improve a filter in high-tech measuring equipment resulted in a successful cooperation between a customer and Sintex a/s. The starting point was two filters and a machined component which were assembled to form a flame trap. By employing Sintex’ innovative approach, the new solution was reduced to a single component manufactured in just a single production process. The sinter technology thereby reduced the costs of further processing and assembly of subcomponents.

Applications.

Sintered filters can provide significant benefits within a number of sectors of industry. For example, we supply filters in a material certified for use with drinking water. Sintex® stainless steel sintered filters are used today in both the food and pump industries, in the chemical sector and for analytical purposes.

Pore distribution

Filtration

Flow control

Protection (e.g. flame traps, explosion protection)

Ventilation / Pressure equalization

The process.

A filter’s function is primarily determined by the pore size. When the pore size has been established, the relationship between the flow rate, pressure drop and filter area is given.

By varying the size of the powder particles and the density of the material, filters can be produced with different pore sizes. Furthermore, by controlling the pore distribution, components featuring different properties can be manufactured.

The compression process makes it possible to obtain a number of different geometries, and the sintering process ensures that the strength is increased to the point that the filters assume their final properties. The sintered filters can be used as self-supporting structural elements or can make up part of a mechanical construction.

Filter design.

Sintex a/s designs a filter element on the basis of pore size and permeability such that it complies with a given specification.

The pore size and the permeability are determined on the basis of the following ISO standards:

ISO 4003-1994 Permeable Sintered Metal Materials – Determination of Bubble Test Pore Size
ISO 4022-2006 Permeable Sintered Metal Materials – Determination of Fluid

Filter specification.

The specifications of a filter element include:

Dimensions
Geometrical tolerances
Application temperature
Particles or media to be filtered
Size and distribution of particles
Area of application
Quantity, units per year and units per order
Filter parameters

A review of the filter’s application and operating conditions – in addition to the filter specifications – provides the best basis for establishing the optimum filter design.

Material and corrosion resistance.

At Sintex a/s we are able to offer several types of material ranging from extreme corrosion resistance to standard stainless alloys.

The choice of material type shall of course take place on the basis of the application requirements, and we are always happy to place our expertise at your disposal in this regard.

Please contact us for further information about stainless steel sintered filters.

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Halbach array

The Halbach arrays were originally developed for focusing accelerator particle beams, due to high permanent magnetic field strength. The high field strength can also be used in magnet production to make anisotropic magnets.

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Let's talk Filter Solutions.

Separation and filtration are important ways to ensure high purity of your product no matter if we are working with medtec, food industry or drinking water.

At Sintex we have been a strong sub supplier for these industries delivering stainless steel filters with controlled porosity on one side and magnets for magnetic filtration on the other side.

At Sintex we do not have standard products within filtration - all our components are customer specific for their applications.

Please feel free contact us if you want to learn more about the support we can give within stainless porous filters as well as magnets for magnetic filters.

Klaus Brøndum Dorin,

Sales Director

+45 6042 9848 [email protected]

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