This is a porous metal filter element engineered for compressed-air service, manufactured from high-purity copper-alloy powder (tin bronze) via mold pressing and high-temperature vacuum sintering. During sintering, spherical powder particles bond by atomic diffusion below the melting point, forming a rigid, three-dimensionally interconnected pore network - free of binders and particle shedding.

Targeting the core pain points of compressed air filtration, including residual dust impurities, oil-water mixed pollution, fragile filter elements, unstable pressure difference and frequent consumable replacement, this product takes 5μm precise filtration accuracy as the core, matched with a 73mm large-diameter flow structure and an 180mm extended effective filtration length. It achieves high filtration efficiency, large air flow rate and long service life, thoroughly solving the common problems of traditional paper and chemical fiber filters such as easy moisture damage, precision attenuation and non-reusability. It is a preferred core component for primary and medium-grade precision filtration of industrial compressed air.

Products Specifications

Material	tin bronze
Pore size	5um
Diameter	73mm
Length	180mm
Technique	Sintering

Why Compressed Air Must Be Filtered?

Compressed air carries three contaminant types - solid particles, oil mist/vapor, and condensed water. Left untreated, they wear valves and cylinders, contaminate products, and corrode piping. A 5 μm sintered copper element acts as the first reliable line of defense, protecting precision downstream components and cutting downtime and maintenance costs.

Filtration Principle: Depth Filtration

Unlike surface filtration (mesh/paper), the sintered copper element performs depth filtration: contaminants are trapped throughout the porous thickness via mechanical interception, inertial impaction, diffusion capture, and adsorption. This delivers ~40% higher dirt-holding capacity, stable accuracy, and longer service intervals. A 5 μm rating corresponds to ISO 8573-1 particulate Class 3 (max. particle size ≤ 5 μm) for general industrial air.

Products Features

Sintered Copper Filter for Compressed Air Filtration 5

High-precision Micropore Filtration with Stable Purification Performance

Adopting graded high-purity copper powder and integrated high-temperature sintering molding, the filter element features uniform and stable micropore size without pore deviation. The 5μm fixed precision efficiently intercepts rust, dust, pipeline impurities and condensed particles in compressed air, and preliminarily absorbs fine water mist and oil mist in the system. It effectively improves compressed air cleanliness and protects core rear-end equipment such as pneumatic valves, cylinders, precision instruments and spraying devices, avoiding jamming, wear and pollution failures caused by impurities. Compared with ordinary filters, its filtration accuracy will not attenuate with service time, maintaining stable long-term purification performance.

Large Flow & Low Resistance for Continuous Industrial Air Supply

Benefiting from the 73mm large-diameter and 180mm extended effective filtration area design combined with a 3D permeable pore structure, the filter element achieves a significantly increased air flow rate with low airflow resistance and low pressure drop. It avoids insufficient air supply and excessive pressure loss caused by filtration, perfectly adapting to 24-hour continuous factory air supply. It solves the problems of small flow rate, easy pressure holding and low production efficiency of traditional small-size filters, ensuring stable and balanced air pressure in pneumatic systems.

Sintered Copper Filter for Compressed Air Filtration 2

Sintered Copper Filter for Compressed Air Filtration 4

High-strength Metal Structure with Superior Durability

Integrally sintered with copper alloy without splicing, glue bonding or fiber materials, the filter element has ultra-high mechanical strength with excellent compression, impact and deformation resistance. It can withstand high-pressure airflow impact without damage, wrinkling or blockage common in paper and chemical fiber filters. The copper alloy material features outstanding oxidation resistance and water vapor corrosion resistance, adapting to complex humid and slightly oily compressed air conditions without rusting, pore blockage or performance failure during long-term operation.

Reusable & Regenerable with Higher Cost Performance

Different from disposable filter elements, this copper powder sintered filter can be reused multiple times. After blockage, impurities in micropores can be quickly removed via high-pressure air back-blowing, water cleaning or ultrasonic cleaning. The filtration accuracy and air flow can be restored to more than 90% of the original state after cleaning. Repeated regeneration greatly reduces enterprise consumable procurement and equipment maintenance costs, ideal for long-term and high-frequency industrial production scenarios.

Sintered Copper Filter for Compressed Air Filtration 3

Sintered Copper Filter for Compressed Air Filtration

Wide Temperature Resistance & Strong Working Condition Adaptability

The filter element operates stably in a wide temperature range, tolerating high-temperature exhaust of air compressors and low-temperature environments such as cold workshops and outdoor pipelines. No structural deformation, micropore blockage or material aging occurs under alternating cold and hot conditions, ensuring stable operation all year round and strong adaptability to various complex compressed air filtration scenarios.

applications

- Air Compressor Post-filtration System: Removes dust, solid impurities and preliminary oil-water separation at the air compressor terminal to purify air source and reduce rear-end equipment pollution risks;

- Front-end Purification of Pneumatic Equipment: Installed at the front end of cylinders, pneumatic valves, pneumatic tools and pneumatic manipulators to prevent jamming, wear and air leakage caused by particle impurities;

- Industrial Spraying Industry: Filters compressed air for painting and electrostatic spraying equipment, avoiding surface particle defects caused by impurities and improving product yield;

- Precision Machining Industry: Purifies air supply for machine tools, automated equipment and precision instruments to ensure high-precision equipment operation;

- Food, Pharmaceutical & Electronics Industry: Pre-treats clean compressed air for production lines to meet basic air source cleanliness standards;

- General Industrial Pipeline Purification: Filters impurities in factory main and branch compressed air pipelines, purifies pipe network air source and extends service life of pipelines and equipment.

FAQ

01.Why choose 5μm copper sintered filter for compressed air filtration?

The main pollutants in industrial compressed air are 3-10μm solid dust, pipeline rust and fine oil-water particles. The 5μm precision can accurately intercept most harmful impurities while balancing filtration accuracy and air flow. It avoids fast blockage and excessive pressure loss caused by ultra-high precision, and unqualified filtration caused by low precision. With durable and regenerable copper sintered material, it solves the problems of easy loss, frequent replacement and unstable purification of traditional filters, making it the most cost-effective universal precision filtration specification for industrial compressed air.

02.Cleaning cycle, replacement cycle and service life

Under normal industrial working conditions (normal impurity content without heavy oil pollution), the filter element needs back-blowing cleaning every 1 to 3 months; the cleaning cycle can be shortened for heavy dust and oil conditions. With proper daily maintenance, the overall service life can reach 2-5 years, far longer than paper and chemical fiber filters, with almost no continuous consumable replacement cost.

03.Will the copper filter rust or shed powder to pollute air source?

The product is integrally sintered with high-purity tin bronze alloy powder, featuring excellent oxidation and corrosion resistance, and will not rust under normal compressed air working conditions. The integrated sintered structure has no loose powder or falling fibers. All products undergo multiple blowing tests before delivery to ensure no powder shedding or secondary pollution to compressed air.

04.Causes of increased pressure difference and reduced air flow

The main cause is micropore blockage by accumulated dust, oil sludge and impurities, which is a normal usage phenomenon. The problem can be solved by removing the filter element for high-pressure reverse air blowing. For heavy oil pollution, ultrasonic cleaning with clean water or special detergent is recommended. The air flow and pressure difference can be fully restored after natural drying without replacement.