Asymmetric Sintered Metal Filter

Asymmetric Sintered Metal Filter

Graded Porous Structure for High Efficiency and Extended Service Life

CMI asymmetric sintered metal powder filters are manufactured by co-sintering metallic powders of different particle sizes in a single high-temperature vacuum sintering process, forming a graded porous structure.

The outer layer features larger pores to capture coarse particles, while the inner layer provides finer pores for precision filtration. This creates a built-in two-stage filtration mechanism within a single filter element.

Compared to conventional single-layer sintered metal filters, the asymmetric structure delivers improved permeability, lower pressure drop, higher dirt-holding capacity, and longer service life.

These filters are particularly suitable for applications requiring both high flow rates and stable fine filtration performance.

Key Features & Benefits

• Asymmetric graded pore structure
• Integrated two-stage filtration (coarse to fine)
• Higher permeability compared to single-layer filters
• Lower differential pressure
• High dirt-holding capacity
• Excellent backwash and cleaning performance
• High mechanical strength and dimensional stability
• Strong resistance to corrosion and temperature
• Extended service life in continuous operation
• Suitable for high solids load and variable particle size distribution

Technical Specifications

• Length: 400 – 1000 mm
• Outside Diameter (OD): 12.5 – 70 mm
• Filtration Rating: typically 0.5 – 10 μm (dual-layer structure)
• Structure: Coarse outer layer + fine inner layer, co-sintered
• Shapes: Cylindrical filters, tubes, discs, and custom geometries
• Cleaning: Backwashable, ultrasonic cleaning, chemical cleaning

Available Materials

• Stainless Steel: 316L, 304L, 310S, 904L
• Titanium
• Hastelloy: C-22, C-276, XB-2
• Inconel: 600, 625, 800
• Monel: 400
• Nickel

Typical Applications

Chemical & Petrochemical

• Filtration of raw materials and intermediates
• Catalyst recovery and particle retention
• Resin adsorption filtration
• Heat transfer oil filtration
• Process and return water treatment

Water Treatment

• Protection for UF, RO, and EDI systems
• Post-ozone clarification
• Seawater desalination pre-filtration

Pharmaceutical

• Decarbonization filtration
• Pre-sterilization security filtration
• API intermediate filtration

Food & Beverage

• Filtration of juice, beer, liquor, and mineral water
• Filtration of vinegar, soy sauce, and liquid condiments

Industrial & Gas Filtration

• Powder interception and recovery
• Gas purification: steam, compressed air, catalytic gases