What advances have been made in sintered metal filter filtration applications?

Today, sintered filters are used more and more, but do you know why these metal filters are slowly replacing the previous generation of filter elements? Yes, it must be that the sintered filter element has many irreplaceable features, and the price and cost are cheaper. So if you are interested in finding out more details, then continue reading below.

What is a filter?

The filter is an indispensable device for transporting media pipelines, generally installed in the pressure relief valve, water level valve, square filter and other equipment at the inlet end of the equipment. The filter is composed of the cylinder body, stainless steel filter mesh, sewage part, transmission device and electrical control part. After the water to be treated passes through the filter cartridge of the filter mesh, its impurities are blocked. When cleaning is required, as long as the detachable filter cartridge is removed and reloaded after treatment, it is extremely convenient to use and maintain.

What is the working principle of the sintered metal filter? Sintered metal filters are efficient, two-dimensional, filter-type, and particulates accumulate on the surface of the media. The correct choice of media grade must balance the needs of filtration applications for particle retention, pressure drop, and backwashability. There are basically three process factors to consider: the velocity of the fluid through the filter media, the viscosity of the fluid, and the properties of the particles. Important particle properties are the shape, size, and density of the particles. Regularly shaped hard particles that form incompressible cakes, such as FCC catalysts, are well suited for surface filtration.

The filtration operation is based on a constant flow, increasing the pressure drop until reaching the terminal pressure drop. The final condition will be reached when the thickness of the catalyst cake increases to the point where the pressure drop of the fluid flow is maximum for a given condition of flow and viscosity. The filter is then backwashed by pressurizing it with gas, followed by a rapid opening of the backwash discharge valve. This backwash procedure produces a high instantaneous reverse differential pressure, which can effectively remove solids from the surface of the media. The reverse flow of clean (filtrate) liquid through the media helps remove solids and remove them from the filter.

History of filters

Thousands of years ago, the ancient Egyptians used the first ceramic filters made from porous clay vessels. Seawater desalination experiments in the 17th century led to the creation of multilayer sand filters. Nobel laureate Richard Zsigmondy invented the first membrane filter and the ultrafine membrane filter in 1922. In 2010, the nanotechnology filter was introduced. To this day, sintered metal filters are widely used in all walks of life and play an irreplaceable role in production and life.


With the development of the economy and the needs of production and life, the filter has been used in various fields for its advantages. In this part, we list a few for you.

① Beverage industry

The method of making carbonated water by injecting carbon dioxide into the water was first discovered by an Englishman, Joseph Priestley, in the late 18th century, while he was hanging a bowl of distilled water over a beer keg in a brewery. Sulfuric acid oil is dropped on the chalk to produce carbon dioxide gas, which is dissolved in the water in a mixing bowl. Later, the Swedish chemist Torbern Bergman invented a power generator that used sulfuric acid to extract carbonated water from chalk. Carbonated water is actually made using a soda siphon or home carbonation system or by dropping dry ice into the water. The food-grade carbon dioxide used to carbonate beverages typically comes from ammonia plants.

At present, the sintered stainless steel filter, such as the porous sparger, is widely used to spray gas in the water. The porous sparger ensures the distribution of the gas in the liquid through thousands of small pores. The spray produces smaller but more bubbles than perforated tube and other spray methods. The surface of the porous sparger has thousands of holes, causing a large amount of gas to pass through a specific location in the liquid. So carbon dioxide can be dissolved in water evenly.


A: Compared with the previous use of chemical methods to produce carbon dioxide, the stainless steel porous sprayer uses physical methods to evenly dissolve carbon dioxide in water through micropores, which is more efficient, stable in nature, and does not produce substances. harmful.

B: Stainless steel filter, especially HENGKO sintered stainless steel filter made of 316L stainless steel, which has passed FDA food grade certification, can be safely used in the beverage industry, thus reducing the risks to health.

Sintered Metal Filter Cup and Plate Manufacturer

② Water process industry

In the 1700s, wool, sponges, charcoal, and sand were the most popular ways to filter particles from water. In 1804, John Gibb created the first filter that used sand to filter water. Commissioned by Queen Victoria in 1835, Englishman Henry Dalton invented the ceramic candle filter to treat water. The filter in it uses the small ceramic opening to filter out contaminants like dirt, debris, and bacteria. In 1854, British scientist John Snow discovered that chlorination of polluted water could purify the source and make it drinkable.

Nowadays, with the development of science and technology, the filtration equipment has been greatly improved, and the sintered stainless steel filter has been mainly applied to the water processing industry.


A: Compared with the ceramic filter, the stability of the stainless steel filter is very strong. The materials used in the stainless steel filter are alloy materials. The stability and various strengths and tolerances of this material are better than those of traditional filter materials. And the maintenance frequency will not be very high, the service life is relatively long.

B: The stainless steel filter itself has a high material strength. Through reasonable design, it can carry more filtration functions. You need a stainless steel filter that can meet the needs to complete a variety of filtration jobs in the production process.

C: HENGKO sintered 316L stainless steel filter has passed the FDA food grade certificate, which can ensure the safety of water.

Sintered Metal Filter Disc Manufacturer

③ Pharmaceutical industry

With the development of the times and technology, the pharmaceutical industry has more and more strict requirements for filtration, especially in the field of high performance liquid chromatography. Since the packing of tubing and column of liquid chromatography instruments is generally µm, the tiny solid particles in the mobile phase are very likely to cause blockage of the entire instrument system, affect the experimental process, and even damage the instrument, so the purity requirements of the mobile phase are very high. Pure chromatographic reagents are generally required. When the experimental requirements are high, in order to further avoid the influence of small particles in the mobile phase on the instrument and experiment, it is necessary to install an in-line stainless steel filtration device in front of the column. The in-line filter can filter the mobile phase well.


A: UHPLCS high pressure inline filters adopt cup structure and have the advantages of less dead volume, no leakage and low back pressure.

B: UHPLCS sintered 316L stainless steel filter is FDA certified, which is healthy and harmless.


After reading this passage, maybe you can’t wait to choose a good filter for your business. Here we list a few.

①HENGKO Biotech Removable Porous Frit Micro Sprayer for Mini Bioreactors and Fermenters System

Stainless steel spray used as a cell retention device. The device consists of a metal tube and a sintered metal filter with a pore size of 0.5 to 40 µm. The sprinkler is inserted into the bowl head plate using a compression fitting.

The spray has a significant effect on oxygen transfer and carbon dioxide removal, which affects cell growth and productivity.

HENGKO sintered filter products are widely used in biofermentation tanks as gas distributors and have higher gas distribution efficiency compared to similar products.


l Aquaculture


l Human nutrition

l pharmaceuticals

l Food supplements

lNatural pigments

② High Efficiency uHPLC Solvent Inlet Filters, Tube Stem, 1/16”


Tube Stem Fitting Adapted for flexible tubing push-in or PEEK compression fittings for ease of use.

Connection size: 1/8” / 1/6” / 1/16” tube stem

Pore ​​size: 2um, 5um, 10um and 20um

Material of Construction: Passivated 316(L) SS

Solvent Inlet Filter Manufacturer

Solvent Inlet Filters offer a wide variety of options and benefits to meet the desired HPLC/UHPLC system protection.

In short, the filter is an indispensable device for transporting media pipelines, generally installed in pressure relief valves, water level valves, square filters and other equipment at the inlet end of the equipment. It has been developed over a long history. Currently, the sintered stainless steel filter has been widely used in various industries, such as food and beverage, water processing, pharmaceutical, etc. for its advances such as safety and innocuousness. When choosing a stainless steel filter, you must carefully consider your application.

If you also have projects that need to use sintered metal filter, you can contact us for more details, or you can send an email [email protected]we will ship back within 24 hours.

Article source: https://www.hengko.com/news/what-is-advances-in-filtration-application-of-sintered-metal-filters/

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