Porous Metal Filters offers a full line of diffusion bonded sintered wire cloth and sintered wire mesh sintered metal filter products under the brand SinterPore™.
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Sintered Metal Mesh is a wire filtering cloth made by pressing multi-layer stainless steel woven wire cloth, then sintered together in a vacuum furnace. This kind of filtering cloth is much better than common metal woven wire mesh with good strength, hardness and good positioning of opening. Its comprehensive property is superior to sintered metal powder and porcelain.
Sheet Sintering or true diffusion bonding, is a process that utilizes time, temperature, pressure and atmosphere to realign and permanently bond the molecular elements of the alloy where they intersect or touch each other. This product is available in single or multiple layer construction. The process produces a stable, secure mesh that can be used for filtering in high pressure applications.
SinterPore™ sintered metal filter wire mesh is available in a wide range of micron ratings, mechanical properties and alloys. The standard product is available in 24” x 48” sheets produced from 316LSS stainless steel. Many other alloys are and sizes are available up to 48” x 55”.
We offer several standard series of SinterPore™ wire mesh laminates.
In addition to our standard products, we offer custom weaves, a wide range of alloys and materials and layering configurations to provide you with a product that meets your exact specifications.
Ensures that all warp and shute wires are locked securely. It also allows for easy in deep drawing and forming.
Standard sheet size is 24” x 48”.
Mesh Layers: 1
Our filter plate series is used in many applications that require a robust and strong filter media. Nominal filter ratings from 1 micron to 100 are available.
Standard Sheet Size: 24” x 48”.
Number of Layers: 5 layers.
Common Construction: Protection / Filter / Drainage / Support Structure / Support Structure
wdt_ID Nominal Micron Lay Up Structure Laminate Thickness Air Permeability 1 2 100/325X/100/12X64/12X64 0.066 19.00 2 5 100/200X/100/12X64/12X64 0.066 25.00 3 10 100/165X/100/12X64/12X64 0.066 45.00 4 20 100/165X800/100/12X64/12X64 0.066 70.00 5 25 100/80x700/100/12X64/12X64 0.066 34.00 6 40 100/325/100/12X64/12X64 0.066 124.00 7 60 100/250/100/12X64/12X64 0.066 119.00 8 75 100/200/100/12x64/12x64 0.066 132.00 9 100 100/150/100/12X64/12X64 0.066 119.00Our high-flow filter plate are the ideal media when high flow and robust construction are required. This series offers a wide range of options in support and drainage mesh.
Nominal filter ratings from 2 – 500 microns are available.
Standard Sheet Size: 24” x 48”.
Number of Layers: 2 layers, 3 Layers, 4 Layers, 5 Layers
2 Layer Common Construction: Protection / Filter: The protection layer is normally a plain or twill weave. Filter layer can generally be almost any mesh construction or weave pattern.
3 Layer Common Construction: Protection / Filter / Support: The protection layer is normally a plain or twill weave. Filter layer can be almost any mesh construction and the support layer is normally a plain weave. This construction provides a media that is easy to clean.
4 Layer Common Construction: Protection / Filter / Drainage / Support: : The protection layer is normally a plain weave. Filter layer can be almost any mesh construction or weave pattern. The drainage layer is normally a plain weave with a high percent of open area. The support layer is normally a plain weave.
5 Layer Common Construction: Protection / Filter / Drainage / Support /Heavy Support: The protection layer is normally a plain weave. Filter layer can be almost any mesh construction or weave pattern. The drainage layer is normally a plain weave with a high percent of open area. The first support layer is normally a plain weave and the heavy support layer can have a wire diameter of .020” or larger.
Super robust media that incorporates woven wire cloth and perforated plate. This media has very high compressive and mechanical strength. Many designs can have safe margins designed into the panel (non-perforated area) to aid in fabrication and handling.
Nominal filter ratings from 5 – 200 microns are available.
Standard Sheet Size: 24” x 48” (Custom sizes available).
Number of Layers: 2 layers, 3 Layers, 4 Layers, 5 Layers.
3 Layer Common Construction: Filter / Drainage / Perforated Plate: Filter layer is exposed and can be almost any mesh pattern. Drainage layer is normally a plain weave. The perforated support layer is normally at least 35% or greater open area.
4 Layer Common Construction: Protection / Filter / Drainage / Perforated Plate: The protection layer is normally a high open area plain weave. Filter layer can be almost any mesh construction or weave pattern. The drainage layer is normally a plain weave with a high percent of open area. The support layer is normally a plain weave.
Custom diffusion bonded laminates have endless design possibilities. We can design sintered wire cloth laminates to fit your application and optimize your process. Sintered metallic fiber felt can be incorporated into our wire mesh laminates.
Nominal filter ratings from 5 – microns are available.
Standard Sheet Size: 24” x 48” (Custom sizes available).
Number of Layers: 2 – 200 or more layers of wire cloth.
Stainless Steel Sintered Wire Mesh is a filtering cloth made by pressing multi-layer woven wire cloth, then sintered together in a vacuum furnace. This kind of filtering cloth is much better than common metal woven wire mesh with good strength, hardness and good positioning of opening. Its comprehensive property is superior to sintered metal powder and porcelain. The major characteristics are: excellent strength, no inner support is required for making filter elements, no material, easily repeated cleaning, long lifespan and good anti-corrosion.
Fine woven wire filter mesh provides micron-rated pore size but it is too thin and can be damaged. The best solution is to laminate the fine mesh to a coarser mesh supportive layer to provide increased strength and thickness. The common sintered wire mesh laminates are 5-layer or 6-layer, which is extensively used in filtration.
DWT produces a wide range of filter elements utilizing sintered wire cloth. Sintered Wire Mesh elements have many advantages over standard filter elements.
All of our Sintered Metal Filters are available in a wide range of micron ratings and alloys. In almost all cases, sintered metal filters can be cleaned multiple times. Contact us today for a detailed quote or if you have any questions about our diffusion bonded sintered wire cloth capabilities.
The company is the world’s best sparger ring supplier. We are your one-stop shop for all needs. Our staff are highly-specialized and will help you find the product you need.
Most common stainless alloy used in wire weaving. Excellent corrosion properties and can withstand temperatures of Degrees F.
Similar properties as 304ss but lower carbon content to permit better welding.
Similar properties to 304ss but is stabilized by the addition of Molybdenum for increased resistance to chemical corrosion.
Similar properties as 316ss but lower carbon content to permit better welding.
Hight resistance to corrosion and rust for sea water applications.
Used in applications where high corrosion properties are required. Some applications could include several chemicals, caustics, and certain organic acids.
One of the most widely used alloys for high corrosion resistance. Used in many food and chemical processes. Monel is a registered trade mark for International Nickel Co INCO.
We invite you to explore and discover how PMF can transform your filtration and separation challenges into opportunities for growth and success. Join us on this exciting journey as we reshape industries, one innovative filter at a time. Together, let's unlock the true potential of porous metal filtration. Give us a call, stop by for a free tour of the facility, or fill out our contact form and we'll gladly assist you.
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Porous Metal Filters provides solutions for industrial filtration, separation, flow control, noise reduction, powder fluidization, and other applications through our SINTERPORE® brand of diffusion bonded (sintered) porous metal materials. Porous Metal Filters’ goal is to utilize its extensive experience to promote porous metal filters for the next generation of advanced filtration and separation products.
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Are you new to filtration? Then first read our paper Basics of Filtration
Liquid filtration is an important step in many industrial processes. Controlling contaminants is important to protect your equipment and instruments, as well as to assure the quality of your product. A filter can help control these problems, but can also act as a monitor for the whole process. For example, a filter that plugs earlier than expected indicates there may be some undesired conditions somewhere in the process.
Filtration removes suspended particles from a fluid or gas by passing the fluid through a porous or semipermeable medium. Not all filtration processes are self-cleaning or without consumables. Filtration at lower micron ratings often requires consumables (filter elements), these are operational expenses (OPEX). Therefore, it’s important to get the highest quality and value to perform consistently every time. Choosing the right filter process with the right filter elements can help you to get a grip on these costs. To protect your supply chain and maintain production it’s important to have stock available when you require it.
All our filter consumables and equipment are fabricated in the Netherlands. We keep stock at our warehouses located in the Netherlands, North America, Australia and Norway. We have a large stock of filter cartridges and equipment ready for delivery to the users. Our team is ready to answer all your technical questions. We know the importance of meeting your production targets and improving your quality, Dutch Filtration provides a reliable filter solution.
Every application requires a different filter solution. It depends on factors such as reliability, cost, efficiency, simplicity and consistency. The decision what filter cartridge you need to use for your process can be challenging. That’s why it’s important to understand the different types of cartridges.
Pleated filters are made from materials like polypropylene, polyester, glass fiber or PES. The pleated sheet media creates a large surface area, so more contaminants can be captured on the surface of the filter material. These filters work best when all particles are nearly all the same size. These particles create an extra filtration layer, but when there are also larger particles they will stick to the surface increasing the differential pressure. Pleated filters are often used as pre-filtration with a micron range of 0,5 – 75, the micron rating of pleated cartridge filters is more precise than spunbonded or wound filters. In general, you select a surface filter over a depth filter when you require filtration for a narrow particle size distribution.
Some high end absolute pleated filters can be cleaned and reused a couple of times before change out, but this depends on the application. Pleated filters are made from synthetic materials and multi layered because this thicker type of material has a higher capacity to capture particles than thinner material.
Our pleated filters have a solid core and all components are Fully Thermal Bonded offering no leakage and no contamination by additives/glues, offering chemical compatibility and are suitable for most fluids, solvents, chemicals. Another advantage of thermal bonded technology is all cartridges can be used for operating at higher temperature and pressure.
Spunbonded or Meltblown cartridges are a very effective type of depth filter. These filters are usually made from polypropylene or nylon. Fibers are blown from a nozzle and thermally bonded on a rotating spindle. This creates a dense and permeable structure. Often the two types are named the same. Another type of depth filter is the melt blown filter, the difference between melt blown filters and spunbonded filters is in the mold construction (see figure 1.1 and 1.2) During the process of Spunbonded filters hot air flows at a cross flow of the emerging fiber, while in the melt blown process, hot air converges with the fiber as it emerges from the mold construction.
These filters can be used when for example wastewater contains various sizes of particles. Compared to pleated filters, spunbonded filters have a smaller filter area but they have the advantage of depth filtration. Due to their different layers, they can hold a large number of different size particles. So spunbonded cartridges are ideal for applications with high contaminant levels with a wide variety of particle sizes. Spunbonded filters do have micron ratings from less than 1 micron to over 100 microns. Spunbonded cartridges are a good cost-effective substitute for wound cartridges. But they aren’t suitable for many industrial applications because they can can collapse by even moderate differential pressure and at higher process temperatures.
String wound filters use multiple layers, wound tightly over a support core in diamond/ v-shaped patterns. The first layer catches particles with same size of the micron rating or larger particles. The second inner layer catches smaller particles. This depth filtration is better athough it is at the expense of the filter surface area. So depth filters (string wound and melt-blown) need to be changed more often than pleated cartridges when the dirt particles have the same size. This type of filter cartridge works very well for fluids with a wide range of solid sizes. The wound cartridge is adaptable for many different applications and is cost-effective. It is extremely suitable for surface water filtration or pre-filtration of waste water. From all the filters mentioned above, the string wound filter is the most original, it has stood the test of time. The string wound medium is not a fixed pore matrix, as with thermally affixed pleated media. For this reason, most depth cartridges can’t handle high flow rates as pleated cartridges can. The string wound cartridges of Dutch Filtration are fully thermal bonded with end caps, and this ensures no binders, lubricants or additives leach into the filtered water.
The choice between the different types of filter elements, depth versus surface, often becomes a complex issue and depends on many factors.
Economics: Generally pleated filters (surface filters) cost more per 10” than depth cartridges. However, below approximately 3 micron it becomes more economical to use pleated cartridges. Pleated filters can be subjected to higher flows, so if the system needs to be sized based on flow data, they can be a more economical choice. For a high flow application fewer pleated cartridges are needed than depth filters. So this requires a smaller housing, fewer replacement cartridges and lower disposal costs.
Clarification versus classification: A depth filter can remove a wider range of particles compared to a surface filter. This type of removal is referred to as clarification, it refers to the wide range of particle sizes. A surface filter is ideal for removing a small range of particles above a specific micron rating, all particles below that rating will pass, classifying the particles of the fluid.
Flow rates/Pressure drops: As mentioned before pleated filters can handle higher flow rates than depth filters and will have lower initial pressure drops.
It’s not easy to decide which filter element is the best solution for your application. We made an overview with a couple of applications. For the best solution always contact us so we can help you with your choice.