Sintered filters for industrial filtration
PORAL® designs and manufactures high-performance porous sintered filters for industrial filtration and a wide range of related applications. Available in stainless steel, bronze, and other alloys, and in various shapes such as tubes, discs, cartridges, and custom parts, PORAL solutions deliver reliability and versatility across demanding industrial environments.
Our range of porous
sintered filters.
PORAL offers a wide range of porous sintered filters manufactured from stainless steel and bronze. Available in various shapes both standard and custom parts, our components are designed to meet the needs of multiple industrial filtration applications. Whether for filtration, flow control, gas diffusion, or noise reduction, PORAL products deliver consistent performance and long-term durability across demanding environments.
Products
Stainless Steel &
nickel-based alloys filters.
PORAL® stainless steel sintered filters are engineered for high-performance filtration in demanding industrial environments. Thanks to their controlled porosity and robust construction, they provide consistent flow rates and excellent filtration efficiency. These filters are ideal for applications in fluid processing, gas filtration, and protective component systems.
Available in a wide range of dimensions and shapes, they can be customized to meet specific mechanical and functional requirements.
Our manufacturing expertise ensures precise, repeatable quality, making stainless steel sintered filters a reliable choice for both standard and complex filtration needs.
Products
Bronze
Filters.
PORAL® bronze sintered filters combine mechanical strength and controlled porosity to deliver dependable performance in air, fluid, and gas filtration. They are well-suited for applications such as noise reduction, flow regulation, providing consistent results even in demanding operating conditions.
Available in both standard designs and fully custom-made solutions, bronze filters can be produced in a variety of shapes and sizes to integrate seamlessly into your system.
With our expertise in manufacturing and customization, PORAL® bronze filters can be tailored to meet the unique requirements of your process or application.
What is a
Sintered Filter.
A sintered filter is a porous filtration component manufactured using powder metallurgy. The metal powder is shaped in a mould, by compression or gravity filling depending on the process used, and then heated in a controlled atmosphere at a temperature below its melting point. During sintering, the powder particles bond together through diffusion at their contact points, forming a rigid and homogeneous structure consisting of a three-dimensional network of interconnected pores.
This structure gives the filter high mechanical strength, uniform filtration performance, and excellent resistance to high differential pressures. It also allows sintered filters to be machined, welded, and shaped into complex geometries while preserving their filtration characteristics, provided that these operations are carried out using suitable processes.
Process of Sintering
Typical microstructure of
sintered metal filters.
PORAL metal filters are produced using powder metallurgy. This process consists of two main steps: shaping powdered materials and sintering. Shaping can be carried out in different ways depending on the alloy in question: cold isostatic or uniaxial pressing, gravity filling. Sintering is a heat treatment consisting of heating the part to a temperature below the melting point of the base metal in a controlled atmosphere. The heat treatment allows the atoms to diffuse in the solid state, creating sintering bridges between the powder particles, thus ensuring the cohesion of the part.
Schematic Representation of Sintering Mechanisms
During sintering, the powder particles bond together through diffusion at their contact points, forming a rigid and homogeneous structure consisting of a three-dimensional network of interconnected pores.
Microstructure of Sintered Bronze Filters
This morphology is characteristic of sintered filters produced from spherical-shaped bronze powders.
Microstructure of Sintered Stainless Steel & Nickel Alloy Filters
This morphology is characteristic of sintered filters produced from irregularly shaped stainless steel powders.
PORAL sintered Filters
Advantages.
High temperature resistance
High temperature resistance, stability over a wide temperature range from cryogenic to high temperature (from 150°C to 900°C).
Filtration efficiency
High filtration efficiency, from 0.2 to 270 µm depending on material and grade.
Corrosion resistance
High corrosion resistance, chemical stability.
Mechanical resistance
High mechanical strength, high differential pressure capacity, vibration and abrasion resistance.
Easy to clean
Easy cleaning for significant operating cost savings by reverse flushing with clean fluid, suitable solvents, chemical reagents, ultrasonic washing or calcination (long service life).
Easy to implement
Easy to implement in any installation design (machinable and weldable, complex shapes).
Homogeneity
Regular behavior, homogeneous distribution of porosity.
Applications for
Sintered Filters.
PORAL sintered filters meet a wide range of industrial requirements wherever controlled porosity is needed to manage the flow of liquids, gases, or particles. Their main applications include :
- filtration and separation
- Sparging
- fluidization
- noise reduction
- suction
- flow control
- pressure control.
Visit our dedicated page to explore each of these applications in detail.
FAQ about
Sintered filters.
What materials are used to make sintered filters ?
PORAL sintered filters are mainly manufactured from stainless steel, nickel-based alloys, and bronze. Other materials and alloys can be supplied upon request, depending on the required volumes and the specific constraints of your application, particularly in terms of temperature, pressure, and chemical compatibility.
What micron ratings do sintered filters offer ?
Depending on the material and filtration grade selected, PORAL sintered filters cover a filtration range from submicron levels up to several hundred micrometres. They therefore allow precise selection of the filtration rating suited to the size of the particles to be retained.
Can sintered filters be custom-made ?
Yes. PORAL sintered filters can be produced as standard parts or fully custom-designed components in shapes such as tubes, discs, cartridges, and cones, tailored to your specific mechanical and functional requirements.
How do you clean a sintered filter ?
Sintered filters can be cleaned by reverse flushing with a clean fluid, suitable solvents, chemical reagents, ultrasonic washing, or calcination, allowing for a long service life and significant savings on operating costs.
Talk to our specialists.
Our engineering team works with you from material selection through custom development to help you specify the right sintered filter for your process.