What is a Sintered Metal Filter?

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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

This guidance sheet is part of a series of guidance sheets . It should be read with our odour guidance for businesses .

Description

Metal sintered filters are made by powder coating metal at controlled temperatures, creating pockets that trap solid pollutants or particles from the air as it passes through. The base metal material and particle/fibre to be sintered will differ depending on the purpose of the filter. Metal sintered filters are most commonly a custom-made solution, as this will ensure the best result.

Type of control

Physical filtration.

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When you would use this

Mental sintered filters are implemented when you need a tailor-made solution, or where filtration is required to protect downwind equipment from airborne pollutants.

Suitable for: filtration systems that can experience high temperatures, high pressures, or corrosive atmospheres.

Industries that would use this: these filters are most commonly used in chemical production, petrochemical processing, power generation, pharmaceutical/medical industries, and food and beverage industries, however, can have broader applicability.

Details and considerations

Although metal sintered filters can be extremely useful in the right circumstances, there are several considerations to keep in mind when deciding to implement one at your site:

• As the metal sintered filters are custom made to adjust for pore size, strength, and materials, they can be costly.
• Metal sintered filters require routine cleaning and maintenance. This is usually done with a high-pressure back pulse of air to dislodge the debris caught in the filter. A good maintenance routine is required for filter cleaning, and ensuring you optimise odorous particle removal.
• It is important to understand your sites needs when selecting to use a metal sintered filter as different metals and compounds can be treated to create filters with different pore sizes and structures.

The process of sintering produces a solid mass of material, in different forms, constructed of fibres or particles. Air filtration is commonly metal. During production of these filters, carefully controlled pressure and heat is used to ensure the materials do not reach the point of liquification, forming the particles/fibres into a solid mass. This mass of material is the metal sintered filter.

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This page was copied from EPA's old website. It was last updated on 18 June .

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