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Metal powder sintered filter elements

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What is a metal sintered filter element?

Metal powder sintered filter elements are porous filtration components formed by pressing and sintering metal powder in a specific proportion. By adjusting the pore size, pore distribution and product density, metal powder sintered filter elements can adapt to various application requirements.

What are the raw materials for it?

High-quality and high-performance metal powders are the raw materials.

Common metal powders include:

1.Stainless steel powder, such as SS316L, SS310

2.Titanium powder

3.Copper powder, mainly bronze alloy

4.Nickel-based alloy powders (such as Hastelloy C276, Hastelloy C22, Inconel600, Monel400, etc.).

The selection of materials determines the filtration performance, structural strength, corrosion resistance and service life of the filter element. If the appropriate nickel-based alloy powder is selected, a maximum working temperature of 1000℃ can be achieved. Choosing titanium powder can make the filter element lightweight and achieve extraordinary chemical corrosion resistance

Sintered mesh filter element

Why is pressing an important process in powder sintering?

Pressing refers to the process of loading metal into a special mold for powder and then applying specific pressure to cause the metal powder to polymerize into cylindrical, flat or other shapes. After choosing the appropriate powder particle size, the pressing pressure will determine the pore size of the powder sintered filter element.

Due to the need to use molds for pressing, the size of it is often limited by the existing molds. Deeply customized filter elements will require the production of new molds, which will take longer and cost more.

Sintering makes it stable and stronger.

The powder after pressing needs to be sintered to make it stable and stronger. Sintering refers to the process in which the surfaces of powder particles fuse with each other to form a whole under specific conditions and temperatures (usually below the melting point). After sintering, the powder filter element will become a self-supporting whole, and the size and position of the pores between the powders will also be completely fixed.

Can it be machined and welded?

The answer is affirmative. The sintered powder filter element can be machined to correct its size and welded to the metal workpiece to facilitate its connection with the filter housing or equipment.

Machining will change the pore size of the powder sintered surface. Do not perform any machining treatment on the effective filter surface.

Outstanding core performance features

  • 1.High precision and high dirt-holding capacity: By precisely controlling the particle size of the metal powder and the sintering process, filter elements of different precision grades from 0.2μm to 100μm can be stably prepared, which can meet the requirements of the vast majority of precision filtration.
  • Outstanding mechanical strength and stability: The one-piece sintered structure enables it to withstand extremely high pressure differences and severe pressure impacts without deformation or cracking. Its compressive strength is much higher than that of traditional filter materials, ensuring absolute safety in high-pressure pipeline systems.
  • Extremely wide temperature resistance and excellent chemical compatibility: Metal filter elements are inherently resistant to high and low temperatures and can operate stably within an extreme temperature range of -200℃ to +800℃.
  • 100% reusable, economical and environmentally friendly: This is the most competitive advantage of metal sintered filter elements. When the pressure difference of the filter element increases due to blockage, it can be thoroughly regenerated through reverse flushing, ultrasonic cleaning, high-temperature incineration and other methods, with a performance recovery rate of over 95%. This reusable feature, although it requires a relatively high initial investment, has an extremely low total cost over long-term use and completely avoids the environmental pollution caused by frequent filter element replacement, which is in line with the concept of green manufacturing.
  • Extremely high cleanliness and no secondary pollution: As its material is allmetal and contains no adhesives, no fibers or debris will fall off during use, ensuring the cleanliness of the downstream fluid.

Application

  1. Petrochemical and chemical industry
  • Applications: Catalyst recovery, filtration of polymerization solutions, filtration of highly corrosive chemicals (acids, alkalisolvents), gas purification (removal of moisture and particulate matter), hydrocarbon filtration, and filtration of process water.
  • Reasons for selection: Corrosion-resistant, high-pressure resistant, and high-temperature resistant.
  1. Food and beverage industry
  • Application: Filtration of beverages such as beer, wine, fruit juice, edible oil, syrup, milk, and purified water to remove impurities and microorganisms; Final filtration in the CIP system.
  • Reasons for selection: Non-toxic, no shedding, can be sterilized at high temperatures, and easy to clean.
  1. Bio-pharmaceuticals and medical devices
  • Applications: Pharmaceutical process water (WFI/ purified water), sterilization filtration of fermentation air, sterilization filtration of medicinal solutions, solvent filtration, and filtration of sterilization gases for medical devices.
  • Reasons for selection: High cleanliness, resistant to repeated high-temperature steam sterilization, no fiber shedding, and in compliance with FDA/GMP requirements.
  1. Electronics and semiconductor Industry
  • Application: Transportation and filtration of high-purity chemicals (such as etching solutions, photoresists,and developers); Ultra-pure water preparation system Protect precision nozzles and components.
  • Reasons for selection: Extremely low metal ion precipitation, no particle shedding, and high-precision filtration.
  1. Electricity and Nuclear Industry
  • Application: Primary and secondary circuit water filtration in nuclear power plants; Filtration of fuel oil and lubricating oil in power plants; Steam generator protection.
  • Reasons for selection: Radiation resistance, high temperature and high pressure resistance, and excellent structural integrity.
  1. Metallurgy and Machinery Industry
  • Application: High-precision filtration of hydraulic oil and lubricating oil; Circulation filtration of coolant; Powder recovery in the powder coating recovery system.
  • Reasons for selection: Wear-resistant, strong compressive resistance, and washable and reusable.
  1. Environmental Protection and water Treatment
  • Application: Precision filtration after industrial wastewater treatment; Gas dust removal (such as high-temperature flue gas); Pre-protection filtration for membrane treatment systems.
  • Reasons for selection: Corrosion-resistant, long service life, and capable of handling complex working conditions.
  1. Aerospace and National Defense
  • Application: Filtration for fuel and hydraulic systems; Gas filtration for life support systems.
  • Reasons for selection: High reliability, extreme environmental adaptability (resistant to high and low temperatures, vibration).

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