MANUFACTURING CAPABILITIES

Metal Sintering 

Metal Sintering Services

Diffusion Bonded / Sintered Metal Filter

SinterPore™ Sintered Metal Filter

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 Mesh provides many additional benefits when compared to traditional wire cloth.

• Diffusion bonded wire cloth can be fabricated in single or multiple layers. Multiple layer assemblies provide enhanced mechanical properties for filters and harsh environment applications.
• Sintered wire mesh is stable, making it ideal for mesh with a high percentage of open area or that requires a secure pore size.
• SinterPore™ sintered mesh is easy to fabricate and produces a stable, strong product. It can be constructed as a depth filter media, providing excellent filtration properties. It is an excellent material to use for products that require controlled permeability.
• Sintered wire mesh can be cleaned and re-used for many applications.
• Diffusion bonding locks and secures all wire in the mesh, eliminating loose wires and increasing the stability of the cloth. It can be used for small parts and special shapes without losing shape or loose wires. Traditional wire cloth can become loose and ineffective over time.

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.

• Single Layer Series                             (SL Series)
• Filter Plate Series                               (FP Series)
• High Flow                                            (HF Series)
• Perforated + Mesh Series                (PM Series)
• Custom Laminates                            (CL Series)

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.

SL Series: (Single Layer Mesh Series)

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

FP Series (Filter Plate Series)

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 0.066 119.00

HF Series: (High Flow Series)

Our 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.

PM Series: (Perforated Plate + Mesh Series)

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.

CL Series: (Custom Layer Laminates)

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.

Definition of Sintered or Diffusion Bonded Wire Mesh:

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.

What Are Sintered Mesh Laminates?

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.

Diffusion Bonded Filter Elements

DWT produces a wide range of filter elements utilizing sintered wire cloth. Sintered Wire Mesh elements have many advantages over standard filter elements.

Sintered Metal Filter Elements Advantages

• Many elements can be cleaned and used multiple times.
• Sintered Wire Cloth elements are much stronger than non-sintered elements.
• Sintered elements have a stable pore geometry that is ideally suited for back flush filtration systems.
• Available in a wide range of alloys. Most common is 316Lss and 304Lss.
• Sintered Mesh Elements are available in a wire range of micron ratings (5 to micron) and can be custom designed to meet or exceed your filtration and performance requirements.
• Sintered Metal Filters are commonly used in Hot Gas Filtration, Polymer Filtration and Oil & Gas Filtration.

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.

Sintered Metal Filter Wire Cloth Alloys

304 Stainless Steel Sintered Wire Cloth

Most common stainless alloy used in wire weaving. Excellent corrosion properties and can withstand temperatures of Degrees F.

304L Stainless Steel Sintered Wire Cloth

Similar properties as 304ss but lower carbon content to permit better welding.

316SS Stainless Steel Sintered Wire Cloth

Similar properties to 304ss but is stabilized by the addition of Molybdenum for increased resistance to chemical corrosion.

316L Stainless Steel Sintered Wire Cloth

Similar properties as 316ss but lower carbon content to permit better welding.

904L Stainless Steel Sintered Wire Cloth

Hight resistance to corrosion and rust for sea water applications.

Nickel 200 Sintered Wire Cloth

Used in applications where high corrosion properties are required. Some applications could include several chemicals, caustics, and certain organic acids.

Monel 400 Sintered Wire Cloth

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.

Your One-Stop Solution for Advanced Filtration and Metal Fabrication

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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Sintered stainless steel filters are a pivotal component in numerous industrial processes, ensuring the seamless operation of machinery, the purity of products, and the safety of

operations. These filters, crafted through an intricate process of sintering, provide solutions that are both durable and efficient, catering to a myriad of applications from the medical

industry to the petrochemical sector. This article aims to dive deep into the world of sintered stainless steel filters, highlighting their types, characteristics, and the underlying

technology that makes them so effective. 

Basics of Sintering Process

The art of sintering, though sounding modern, has its roots in ancient metallurgical techniques. At its core, sintering is the process of making objects from powder by heating the material until its particles adhere to each other. Unlike full melting, sintering heats the powder below its melting point, until the particles bond due to diffusion but without large-scale liquefaction.

When applied to stainless steel in the context of filter production, the sintering process achieves a few critical objectives:

1. Density Control:

    The sintering process allows for the control of the material's porosity, ensuring the resulting filter has desired permeability characteristics.

2. Structural Integrity:

    By fusing particles at the molecular level, sintered filters gain superior mechanical strength compared to non-sintered counterparts, making them resistant to wear, tear, and high pressures.

3. Uniformity:

    The sintering process ensures a consistent and uniform pore size distribution throughout the filter, translating to predictable and consistent filtration performance.

4. Chemical Stability:

    Stainless steel's inherent resistance to corrosion is further enhanced through sintering, ensuring longevity and resilience against various chemicals.

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The beauty of the sintering process lies in its versatility. By adjusting the sintering temperature, time, and pressure, manufacturers can fine-tune the properties of the filter, tailoring it to specific industrial needs. This adaptability, combined with the inherent benefits of stainless steel, results in filters that are both functional and durable.

OK, Then, Let's Check Some Features of Popular 4 Types of sintered stainless steel filter, Hope those information can helpful for your to understand more details of sintered stainless steel filters when choose for your filtration system. 

1. ) Plain Sintered Stainless Steel Mesh

One of the most commonly used types of sintered stainless steel filters is the plain sintered mesh. This filter is constructed using layers of woven stainless steel mesh, which are then sintered together to form a sturdy and reliable filtration medium.

Description: Layers of woven stainless steel mesh are laminated and then sintered, creating a filter with consistent pore sizes and a strong structural matrix.

Function: Its primary function is to filter based on mesh size and layering, ensuring a specific size of particles is trapped while the desired medium passes through.

Characteristics:

* High Strength and Stability: Thanks to the sintering process, this filter boasts impressive strength, making it resistant to mechanical stress, high pressures, and temperature variations.

* Good Corrosion Resistance: The inherent properties of stainless steel combined with the sintering process give this filter exceptional resistance to corrosion.

* Heat Resistance: Suitable for high temperature and pressure applications, this filter can function effectively in challenging environments.

Advantages:

* Uniform Pore Size Distribution: This ensures predictable filtration outcomes, making it a reliable choice for many industrial applications.

* Easily Cleanable and Reusable: The structural integrity of the filter means it can be cleaned and reused multiple times, offering cost savings in the long run.

Drawbacks:

* Higher Cost: Compared to other filter materials, stainless steel can be more expensive, reflecting in the cost of the filter.

* Potential for Clogging: In scenarios with high particulate loads, there's a potential for the filter to clog, necessitating regular cleaning and maintenance.

2.)  Sintered Powder Stainless Steel Filters

Stepping away from the woven mesh structure, we find filters made entirely from stainless steel powder. These are pressed into shape and then sintered, resulting in a filter with a gradient structure, offering unique filtration capabilities.

Description: These filters are formed from stainless steel powder that is compressed into a desired shape and then sintered to solidify and bond the particles.

Function: Designed for filtration with a gradient structure, they offer multi-level filtration within a single filter medium.

Characteristics:

* Controlled Porosity: The use of powder allows for precise control over the filter's porosity, tailoring it to specific filtration needs.

* High Filtration Precision: The gradient structure means particles of varying sizes are trapped at different levels of the filter, resulting in high filtration efficiency.

Advantages:

* Good Permeability: Despite their fine filtration capabilities, these filters maintain good permeability, ensuring flow rates are not unduly affected.

* Stable Shape and Structure: Once sintered, the filter maintains its shape and structural integrity even under challenging conditions.

Drawbacks:

* Brittleness: The powder-based structure can sometimes lead to a filter that is less robust compared to mesh variants, especially when subjected to mechanical stresses.

* Higher Manufacturing Complexity: The process of creating a consistent and effective powder-based filter can be more complex, potentially reflecting in its cost. 

3. ) Multi-layer Sintered Mesh Filters

Diving deeper into the realm of sintered stainless steel filters, the multi-layer sintered mesh filters offer a blend of strength and precision that few other filters can match.

Description: This type of filter is an amalgamation of several layers of stainless steel mesh, each with distinct mesh sizes, which are sintered together to form a robust filtration medium.

Function: Designed for detailed filtration tasks, these filters can trap particles at various depths, ensuring both surface and depth filtration. 

Characteristics:

* Multilayer Filtration: The use of multiple mesh layers means particles of different sizes are trapped at different layers, enhancing filtration efficiency.

* High Dirt Holding Capacity: Multiple layers provide a larger surface area and depth, allowing the filter to hold more contaminants before needing cleaning or replacement.

Advantages:

* Customizability: The choice of mesh layers can be tailored for specific filtration requirements, ensuring optimal performance.

* Superior Mechanical Strength: The multi-layer design, combined with the sintering process, provides a filter with exceptional strength and durability.

Drawbacks:

* Complexity: The multi-layered design can lead to increased manufacturing complexity, potentially raising costs.

* Cleaning Challenges: The depth and intricacy of these filters can sometimes make them more challenging to clean thoroughly compared to plain mesh filters.

4.)  Sintered Metal Fiber Felt Filters 

Shifting gears from the realm of mesh and powder, we encounter filters made from sintered stainless steel fibers. These offer a unique set of advantages, especially when high permeability and dirt holding capacity are paramount.

Description: Constructed from a web of stainless steel fibers which are then sintered together, these filters resemble a metallic felt in texture and appearance.

Function: Engineered for high permeability filtration tasks, these filters can handle large flow rates while ensuring efficient particle capture.

Characteristics:

* Deep Filtration: The intricate web of fibers allows for effective depth filtration, capturing particles throughout the thickness of the filter.

* High Porosity: The fiber-based structure provides a high degree of porosity, ensuring minimal resistance to flow.

Advantages:

* Very High Dirt Holding Capacity: The depth and structure of these filters mean they can capture and hold a significant amount of contaminants.

* Resistance to Pressure Surges: The felt-like structure offers good resistance to sudden changes in pressure, ensuring longevity and reliability.

Drawbacks:

* Higher Cost: The unique manufacturing process and materials can make these filters more expensive than other types.

* Potential Fiber Shedding: In some scenarios, especially when worn out, there's a potential for minute fibers to shed from the filter, which might not be suitable for ultra-pure applications.

Applications & Industries

The versatility of sintered stainless steel filters makes them highly sought-after components in a myriad of industries. Their robustness, precision, and adaptability align with the rigorous demands of modern manufacturing and processing. Here's a look at some key industries and applications where these filters play a crucial role:

* Chemical Processing:

   In the world of chemicals, purity is paramount. Whether it's refining raw materials or producing end-products, sintered filters ensure contaminants are effectively removed. Their corrosion resistance also means they can handle aggressive chemicals without degradation.

* Food and Beverage:

   Ensuring the safety and purity of consumables is of utmost importance. Sintered filters are used in various stages, from refining oils to filtering wines, ensuring that only the desired components make it to the final product.

* Oil and Gas:

   In the extraction and refining of petroleum products, contaminants can lead to equipment damage and inefficiencies. Sintered filters help in separating particulate matter, ensuring smooth operations.

* Pharmaceuticals:

  The production of medications demands the highest levels of purity. Filters play a role in processes such as active pharmaceutical ingredient (API) production, ensuring contaminants are effectively removed.

* Water Treatment:

   With the growing demand for clean water, sintered filters are employed in advanced filtration systems, ensuring water is free from particulates and other contaminants.

* Aerospace and Automotive:

  In industries where precision is critical, sintered filters help ensure that hydraulic systems, fuel lines, and other fluid systems are free of contaminants, ensuring optimal performance and safety.

Sintered stainless steel filters stand as a testament to the marriage of ancient metallurgical techniques with modern engineering. Through the process of sintering, these filters gain properties that make them indispensable in a plethora of industries. Their ability to offer precise filtration, coupled with their robustness and longevity, sets them apart as the go-to solution for many complex filtration challenges.

As industries continue to evolve and push the boundaries of what's possible, the role of these filters will undoubtedly grow. Whether it's ensuring the purity of life-saving drugs, producing gourmet foods, or powering our vehicles and machines, sintered stainless steel filters will remain at the forefront, silently and efficiently playing their part.

Get in Touch with the Experts

If you're seeking tailored solutions for your filtration needs or have any inquiries about sintered stainless steel filters,

HENGKO are here to assist. With years of expertise in the sintered filter industry, we have the knowledge and

capabilities to address your unique challenges. Don't leave your filtration needs to chance. Contact HENGKO

Post time: Oct-20-