Sintered metallic filters
AmesPore® porous metallic filters and components are sintered stainless steel or bronze parts with high porosity (between 25% and 60% by volume).
They are produced by the powder metallurgy technology, which consists of shaping a mixture of metal powders in a mould or tool that has the negative shape of the part and then sintering the resulting preform. The preform may be created by gravity filling, by uniaxial or isostatic pressing or by extrusion, depending on the material to be shaped, the desired porosity and the component geometry.
Sintering consists in heating the preform to a temperature lower than the melting point of the base metal (between 700ºC and 1300ºC) under carefully controlled conditions of atmosphere and time. The temperature causes the powder particles to weld together.
The total porosity and the pore size can be varied to obtain filtering efficiencies ranging from 0.02μm (20 nm bacterial level) to 270 μm according to the material.
Because the level of porosity is uniform throughout the filter volume.
This advantage makes the fluid follow an intricate path within the filter, which therefore acts as a depth filter throughout its cross-section.
– The parts can work under elevated temperature and pressure without deforming or degrading. They have a high impact strength (they are not brittle).
– They have good chemical resistance: the sintered filters resist corrosion under a wide range of liquids and gases, especially when they are made of stainless steel.
– They behave as self-supporting structural elements thanks to their great rigidity.
– They are reusable, and therefore have a long useful life. They can be cleaned using countercurrent or solvents.
– They are weldable and machinable, so they can be adapted to specific assemblies.
– The parts (especially the bronze ones) can have complex shapes to incorporate additional features to the filter function.
Using AmesPore® Sintered Filters
The porosity can retain the solid particles contained in a liquid or gaseous fluid and can partially separate liquid and solid phases, or gas phases of different molecular weights. This property is used to filter fluids with a wide range of characteristics.
The porosity reduces the pressure of the fluid passing through it, a phenomenon known as pressure drop that is used to muffle the sound of gases under pressure (mufflers) or to protect hydraulic equipment and electronic devices.
Thanks to the porosity, fluids passing through the porous component have a constant outflow, especially if the flow is generated by capillarity. This allows very precise control of the outflow of pressurized fluids.
When pressurized gas passes through the porosity, the outflow from the porous component is constant, controlled and distributed with the same pressure at all points. This feature makes it possible to gasify or aerate liquids, provide a constant air flow, or handle solid powders through fluidization.
The porosity is able to retain and condense moisture contained in a gas passing through it. This property is used for drying and for protecting devices against corrosion.
The presence of a porous component before a flame prevents flashback. Typical applications include gas boilers, heaters, welding systems, etc.
Oil and gas industry, chemical industry, water purification, nuclear installations, heat exchangers, ozonation, chemical powder transport, catalyst recovery, general drying, manufacturing of chemical products and pharmaceuticals, hydrogen purification, etc.
Gasification of liquids and spirits, evaporators, liquefaction, transport of solid powders, packaging manufacturing, etc.
Pneumatic and hydraulic circuits (compensators, bleeders, regulators, mufflers), protection of sensors and gauges, gearboxes, pneumatic cylinders, welding, industrial gases, industrial filtering, extinguishers, moulds, grinders, boiler parts, etc.
Automotive, marine, aviation, railways, etc.
HOUSEHOLD APPLIANCES/HOME FITTINGS
Boilers, water heaters, gas burners, printers, etc.
Aquariums, underwater fishing, clinical analysis, medical gases, protection of electronic equipment, energy, personal care, measuring equipment, diverse machinery, etc.
RECOMMENDATIONS FOR USE
AmesPore® filters are manufactured in accordance with the ISO 9001, IATF 16949 and ISO 14001 quality standards.
AmesPore® filters comply with the following European directives:
WOULD YOU LIKE MORE INFORMATION?
AMES can create specific solutions of shapes, materials and performance in which the porosity of the sintered product is tailored to the applications.
Please, contact us and we will answer you as soon as possible.