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Sintered Metal Powder Filter

Sintered Metal Powder Filter Elements: Precision Porous Metal Solutions for Extreme Operating Conditions

Sintered metal powder filter elements are rigid, self-supporting porous structures manufactured through cold isostatic pressing or axial compaction followed by high-temperature vacuum sintering. By controlling metal powder particle size, shape, and sintering parameters, these filters yield uniform pore distributions with high mechanical strength.

Unlike flexible wire mesh or fiber felts, porous sintered powder media withstand high differential pressure without media deformation or pleat collapse. Engineered for aggressive chemical clarification, catalyst recovery, continuous steam filtration, and gas sparging, our sintered metal powder filters operate reliably in environments where polymeric, paper, or textile media fail. They serve as direct drop-in replacements for standard OEM porous metal cartridges.

Sintered Metal Powder Cartridge

Product Name: Sintered Metal Powder Cartridge, SS sintered powder filter elementMaterial: Standard SS316L, Titanium, or customized according to requirmentFilter Micron: 0.22um-100µmSize: diameter

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Sintered Metal Powder Disk

Product Name: Sintered metal powder disk, Sintered porous filter Material: Standard SS316L, TitaniumFilter Micron: 0.22um-100µmShape and size: round shape maximum diameter 300mm, square shape maximum

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Sintered Porous Bronze Filter

Product Name: Sintered porous bronze filter, Sintered copper porous filterMaterial: bronze, copperFilter Micron: 0.5um-120µmShapes: Disc, Cup, Cartridge, Pannel or customized other special

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Sintered Bronze Muffler

Product Name: Sintered bronze muffler, Sintered bronze powder mufflerMaterial: bronze powder, copper powderFilter Micron: 0.1um-300µmShapes: sound-absorbing panels, sound-absorbing inserts,

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Type & Specifications

Parameter	Standard Specification Range
Filtration Rating	0.2 micron to 100 micron (Bubble Point verified per ISO 4003)
Porosity	30% to 50%
Standard Materials	316L Stainless Steel, Titanium Grade 1, Hastelloy C-276, Inconel 600, Monel 400, Nickel 200
Seamless Porous Tube OD	10 mm to 100 mm (Custom diameters available up to 300 mm)
Maximum Tube Length	Up to 1200 mm seamless; longer lengths achieved via orbital TIG welding
Porous Disc Diameter	5 mm to 500 mm
Thickness Range	1.0 mm to 10.0 mm
Connection Interfaces	Threaded (NPT, BSP, M20x1.5), DOE (Double Open End), Code 7, Flanged, Custom CNC Adapters

Material & Filtration Performance

Structural Rigidity & High Pressure Resistance
Sintered powder structures exhibit high hoop strength and compressive modulus. Standard elements withstand differential pressures exceeding 10 bar to 20 bar in normal flow direction, with specialized heavy-wall configurations rated up to 80 bar without media migration or deformation.

Uniform Pore Geometry & Sharp Cut-Off
Controlled powder classification produces narrow pore size distribution curves. This ensures predictable retention efficiency and prevents off-spec particle bypass during pressure surges or flow fluctuations.

Powder Integrity & Solid-State Diffusion Bonding
Vacuum sintering at temperatures up to 1250 degrees C creates solid-state metallurgical bonds at all powder contact points. This bond structure prevents powder shedding and particle release into downstream filtrate.

Thermal Stability & Corrosion Resistance

316L Stainless Steel: Standard choice for general industrial steam, solvents, and neutral liquid filtration up to 400 degrees C in oxidizing atmospheres.
Titanium Grade 1: Ideal for wet chlorine, hypochlorite solutions, seawater, and nitric acid processing where stainless steels suffer pitting or stress corrosion cracking.
Hastelloy C-276 / Inconel 600: Selected for hot concentrated mineral acids, strong alkaline solutions, and high-temperature gas processing up to 600 degrees C.

Applications

Catalyst Retention & Recovery: Recovery of precious metal catalysts (such as Raney Nickel, Palladium, Platinum on Carbon) from hydrogenation reactors and fine chemical processes.

High-Temperature Steam & Gas Filtration: Removal of particulate matter from culinary steam, process steam, and hot gas streams in petrochemical plants and pharmaceutical facilities.

Gas Sparging & Aeration: Injecting precise micro-bubbles of gas (oxygen, nitrogen, ozone, carbon dioxide) into liquids for fermentation, water treatment, and beverage carbonation.

Polymer Melt & Viscous Fluid Clarification: Final polishing of high-viscosity resins, monomers, and polymers before processing.

Vent & Breather Filters: Protecting storage tanks, reactors, and sterile enclosures from atmospheric particulate contamination.

Model Selection Guide

★Process Medium & Fluid Chemistry: Determines the alloy selection (316L vs Titanium vs Hastelloy) to prevent chemical attack or ion leaching.

★Flow Rate & Allowable Differential Pressure: Higher flow rates require larger total surface area or increased porosity to maintain initial pressure drop (Delta P) within operating limits.

★Target Micron Rating & Efficiency:Match the required particle retention threshold (for example, 0.5 micron for catalyst retention vs 10 micron for steam filtering).

★Physical Dimensions & Interface Geometry:

Seamless Porous Cartridges: Best for backwash cleaning cycles and high-pressure housings.
Porous Discs / Plates: Suitable for nutsche filters, Buchner funnel inserts, and fluid beds.
Sparger Tubes: Designed with specific pore sizes to control bubble diameter during gas dispersion.

Manufacturing & Quality Control

Manufacturing Flow

Raw Metal Powder Inspection -> Precision Powder Blending & Compaction -> High-Vacuum / Hydrogen Atmosphere Sintering -> CNC Interface Machining & Orbital TIG Welding -> Bubble Point & Permeability Testing -> Ultrasonic Solvent Cleaning & Cleanroom Packaging

Quality Control & Inspection Protocols

Material Verification: Positive Material Identification (PMI) and chemical composition analysis on incoming powder batches.

Pore Size & Permeability Testing: Bubble point pressure testing per ISO 4003 and air/water permeability verification per ISO 4022.

Weld Joint Integrity: Automated TIG/Plasma welding with 100% helium leak testing or bubble leak inspection to ensure zero bypass at adapter connections.

Material Traceability: Full EN 10204 3.1 Material Test Reports (MTR) provided with chemical composition and physical properties.

OEM & Customization Capabilities

Print-to-Part Custom Fabrication

Machining custom end fittings, threaded connectors, and mounting flanges to match client equipment drawings.

Drop-In Replacement Elements

Direct dimensional and performance matching for standard industry cartridges (such as Mott, GKN, or Pall equivalents).

Surface Modifications & Coatings

Specialized passivation, electropolishing, or surface treatments to minimize bio-fouling or chemical adhesion.

Prototype Development

Fast turnaround on small batch samples for pilot plant testing and laboratory validation.

FAQ

Q: How does a sintered metal powder filter compare to a sintered wire mesh filter?

A: Sintered powder filters offer higher thickness, smaller pore sizes (down to 0.2 micron), and superior mechanical strength against high pressure. Sintered mesh filters offer higher permeability and easier surface cake release due to their thinner, layered wire structure.

Q: What methods are recommended for cleaning sintered powder filter elements?

A: Sintered powder filters can be regenerated using reverse liquid backflushing, gas blowback, ultrasonic bath cleaning, chemical acid or caustic washing, or high-temperature organic burnout, depending on the contaminant type.

Q: How do you prevent bypass leakage at the weld joints between the porous tube and solid end caps?

A: We use automated orbital TIG welding or electron beam welding with optimized power settings to achieve complete weld penetration without melting or closing off adjacent porous zones. Every assembly undergoes a 100% leak check before shipment.

Q: Can sintered titanium powder filters be used in medical or food applications?

A: Yes. Titanium Grade 1 is biocompatible, non-toxic, and resistant to body fluids and organic acids, making it suitable for pharmaceutical filtration, biotech processing, and medical gas distribution.

Q: What is the typical service life of a sintered powder filter element?

A: Because the metal matrix is rigid and cleanable, service life is often measured in years rather than months or weeks, provided the media is cleaned before the differential pressure reaches critical limits.

Q: What quality documentation is included with each shipment?

A: Every shipment includes an Inspection Certificate, EN 10204 3.1 Material Test Report for the alloy powder and solid hardware, Bubble Point Test Data, and Dimensional Inspection Sheets.

Q: What is the lead time for custom-engineered sintered powder cartridges?

A: Standard size samples or stock powder tubes ship in 5 to 7 business days. Custom engineered cartridges requiring specialized CNC machining or tooling ship in 2 to 3 weeks after drawing approval.

As one of the leading sintered metal powder filter manufacturers and suppliers in China, we offer a wide range of products with superior quality. Please rest assured to buy advanced sintered metal powder filter from our factory. We also accept customized orders.

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