13 October 2022

All You Need To Know About Sintered Powder Metal Filters?

Sintered Powder Metal Filters

What is a Sintered Metal Filter?

A sintered metal filter is a filter engineered using the sintering technology. Sintered metal filters designed with perfect combination of metal membrane materials, pore structure, composition, and pressure strength last longer and filter consistently over the time. Variants of such filters offer compatibility and are designed for various harsh operation environments like high pressure, high temperature, corrosive chemicals, to name a few.

What is Sintering?

Sintering is a technology that fuses particles together by using heat and pressure without melting the metals. Various metals are sintered to engineer filter equipment, elements and different type of cartridges with a variety of pore size structure and composition.

Why Sintered Metal Filters?

Sintered metal filters are robust and exhibit excellent performance for separation of particulate matter from either liquid or gas process streams. The filter media is fabricated from metal power or fiber and sintered to form filter elements. These filter elements can withstand higher temperature as compared to other filter elements. Along with high temperature resistance, corrosion is also other criteria where sintered elements prove superior. Additionally, the cost of ownership of sintered filter systems is considerably low as they can be cleaned via ‘blowback cleaning’ multiple times and reused with the same filtration efficiency.

The sintered filter systems and elements are critical in achieving effective particulate removal to protect equipment, meet environmental regulations and achieve successful cost-effective filtration operations.

Types of Materials used for Sintered Filter Development:

  • Stainless steels (304L, 316L)
  • Titanium and its alloys
  • Nickel
  • MoneKK) (Ni-Cu alloy)
  • Inconel® (Ni-Cr-Fe alloy)
  • Iron and aluminum alloy
  • Hastelloy ®B,C and X

More about Gopani Porous Metal Filters

typical microstructure sintered metal powder filters

Sintering neck formed by solid state diffusion Schematic representation of sintering mechanisms

ss microstructure texture, thin strip, rolling

Microstructure of Stainless steel & Ni alloys filters after sintering.Gr. 15- x 100

Sintered Microstructure Bronze Filters

Microstructure of Bronze filters after sintering.Gr. 15- x 250

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Filtration Efficiency

The efficiency values below are given for air and water at a given flow rate.

Stainless Steel And Ni Alloys


ISO 12500-3 in gas = Air and ASTM F795 in Liquid = Water

Types of Sintered Filter Elements

Factors to Consider before Buying a Sintered Cartridge Filter

  • Operating conditions (temperature, pressure and flow rate)
  • Filtration precision and filtration efficiency
  • Appropriate material (corrosion resistance and high temperature resistance)
  • Allowable pressure drop
  • Appropriate medium strength (tensile strength, fatigue strength and load capacity)

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Sintered Filter Elements and Systems for Tailored for Industries Like

Pharmaceuticals and API
Speciality Chemicals
Food and Beverage
Refining and Petrochemicals
Fine Chemical

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