Porous Metal Filter

Porous Metal Filter OEM Factory

– Sintered 316L / Bronze / Titanium Filters

High-performance porous metal filters engineered for precise gas and liquid filtration.
Custom micron rating, size, structure, and OEM private labeling available.

HENGKO specializes in sintered porous metal filters, porous stainless-steel filter elements,

and custom sintered components for demanding industrial applications.

With 20+ years of manufacturing experience, we deliver filters with high mechanical strength,

stable pore structure, excellent corrosion resistance, and long service life.

Whether you need 0.1–100 µm micron rating, 316L / Ti / Ni alloy materials, or custom tubes, discs, cones,

and cartridges, HENGKO offers full OEM/ODM engineering support and ISO-level quality control.

Contact us for your porous metal filter project: ka@hengko.com

we will send back asap within 24-Hours.

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1. Introduction to Porous Metal Filters

(What They Are & Why They Are Critical)

Porous metal filters—also known as sintered metal filters, porous stainless steel filters,
or sintered porous elements—are engineered metal components containing a highly uniform
3-dimensional network of interconnected pores.

These pores are created by vacuum sintering metal powders at controlled temperatures, forming a rigid,
high-strength, permeable structure capable of precise filtration and flow control.
Because of their mechanical strength, corrosion resistance, stability, and reusability,
porous metal filters are widely used in:
- Semiconductor equipment (CVD / PVD / Etch / Diffusion / ALD)
- Gas analyzers and gas detection instruments
- Vacuum KF / VCR / ISO flange systems
- Fuel gas & hydrogen purification
- Environmental monitoring sensors
- Chemical and petrochemical systems
- Pharmaceutical and bioprocessing industries
- High-temperature gas/liquid filtration
- Sparging, aeration, and diffusion systems
- Flow equalization and flame arresting

A porous metal filter provides consistent and accurate filtration performance,
even under harsh environments involving high temperature, high pressure, corrosive chemicals,
cyclic loads, or aggressive gases.

2. Why Choose HENGKO as Your Porous Metal Filter OEM Factory?

HENGKO is a professional manufacturer specializing in sintered porous metal filters,
porous stainless-steel filter elements, sintered tubes/discs, and custom OEM
porous components used by global sensor brands and industrial system builders.

With more than 15+ years of porous metal R&D and OEM experience, we provide:

✔ Full-range OEM / ODM services
- Custom micron size (0.1–120 µm)
- Custom porosity (10–55%)
- Custom shapes: disc / cup / cone / tube / cartridge / blocks
- Custom materials: 316L / Bronze / Titanium / Nickel alloys
- CNC precision machining (NPT / BSP / UNF / VCR / KF / Flange)
- Laser welding and metal sealing
- Logo engraving & private labeling
- Prototyping + mass production

✔ Advanced vacuum sintering technology
- Ensures stable pore size distribution, high mechanical strength,
and consistent flow performance.

✔ Strong technical support
- Engineers with expertise in gas dynamics, filtration mechanics, metallic materials,
and sensor design.

✔ Complete QC system
Particle size analysis, porosity testing, helium leak detection, pressure resistance testing,
and chemical compatibility evaluation.

✔ High repeat-order rate from industrial manufacturers
- We supply porous metal filters to companies in:
semiconductor, instrumentation, environmental monitoring, chemical engineering,
gas equipment, petrochemical, and laboratory industries.

HENGKO is not a trading company
—we are a direct OEM factory, ensuring stable-quality
production and competitive pricing.

3. How Porous Metal Filters Work

(Engineering-Level Explanation)

Porous metal filters operate through a complex but highly
controllable mechanism combining:

3.1 Mechanical Filtration (Primary Mechanism)
Particles larger than the pore size are mechanically intercepted and
retained on or within the 3-D porous structure.

3.2 Depth Filtration
Unlike mesh screens, porous metal filters have thick porous pathways,
allowing particles to become trapped within the depth of the material.

3.3 Diffusion & Inertial Interception
At smaller micron levels (0.1–5 µm), particle capture relies on
Brownian motion and inertial collision.

3.4 Laminar Flow Equalization
Porous metals generate extremely uniform laminar flow, ideal for:
- Gas analyzers
- Pressure equalization
- Emission detection
- Flow control devices

3.5 Sparging & Aeration
When used for sparging/diffusion, pressurized gas passes through micro-pores,
creating fine and uniform microbubbles.

4. Material Options for Porous Metal Filters

(Full Technical Comparison)

HENGKO offers multiple metal materials depending on application, chemical environment,

cost, and performance requirements.

Here is a detailed comparison table to help you easily review and compare different porous metal filter materials:

Material	Key Advantages	Best Applications
316L Stainless Steel (Most Popular)	• High mechanical strength	• Gas detection systems
	• Excellent corrosion resistance	• Vacuum KF / VCR interfaces
	• Withstands 200–500°C	• Chemical filtration
	• Suitable for most gases & liquids	• Sensor protection
	• Cost-effective & stable	• Hydrogen / nitrogen / compressed air systems
	• Ideal for general industrial filtration
Bronze Porous Metal Filters	• Lower cost	• Pneumatic systems
	• Moderate mechanical strength	• Silencers
	• Good filtration uniformity	• Air exhaust filtration
	• Suitable for general air filtration
Titanium Porous Filters (Ultra High Performance)	• Extreme corrosion resistance	• Semiconductor gas filtration
	• Biocompatibility	• Biomedical industry
	• High temperature resistance up to 600°C	• High-purity chemical processes
	• Ultra-clean, ideal for critical processes
Nickel Alloy / Monel / Inconel Porous Filters	• Exceptional corrosion resistance	• Harsh chemical processes
	• Withstands highly oxidative or acidic gases	• High-temperature reactors
	• High mechanical strength under cyclic load	• Corrosive gas filtration

5. Manufacturing Technology:

How HENGKO Produces High-Performance Porous Metal Filters

Our production combines advanced powder metallurgy, controlled sintering, precision machining, and high-level quality control.

Stainless Steel Sintered Porous Filter - Manufacturing Process

6. Technical Specifications of Porous Metal Filters

Porous metal filters must meet strict engineering parameters to ensure stable performance in high-pressure, high-temperature,

or corrosive environments. Below is a detailed technical specification list applicable to HENGKO’s sintered porous components.

so you can know details of each materials of porous metal can use.

6.1 General Technical Specifications

Specification	Value / Range	Notes
Micron Rating	0.1–100 µm	Narrow PSD, stable pore structure
Porosity	10–55%	Adjustable based on flow/pressure requirements
Thickness	0.2–10 mm	Custom available
Max Pressure Resistance	Up to 30 MPa	Depends on shape & thickness
Temperature Range	-200°C to 600°C	Per material (316L, Ti, Ni alloy)
Flow Rate	Custom tested based on API/ISO curves	Flow data available
Chemical Resistance	Excellent	Ideal for gas/liquid corrosive media
Cleaning Method	Ultrasonic, back-flush, chemical wash	Reusable
Materials	316L / Bronze / Titanium / Nickel Alloy	OEM material selection
Shape Options	Tube, disc, cup, cone, cartridge, block	Fully customizable
Welding	Laser welding / TIG welding	Leak-proof
Machining	CNC precision up to ±0.02 mm	For threads & flanges

6.2 Mechanical Strength Specifications

Property	Typical Value
Compression Strength	>150–300 MPa (316L)
Tensile Strength	500–600 MPa (varies by material)
Burst Pressure	5–30 MPa (depends on OD/ID/thickness)
Poisson Ratio	0.25–0.30
Young’s Modulus	120–160 GPa

6.3 Filtration Performance Specifications

Parameter	Description
Pore Size Distribution (PSD)	Narrow distribution ensures predictable filtration
Depth Filtration	Multi-layer internal particle capture
Flow Uniformity	Highly stable laminar flow
Gas Permeability	High permeability even in 1–2 µm grades
Liquid Filtration Efficiency	95–99.9% depending on micron size

6.4 Chemical Compatibility Chart (Short Version)

Medium	316L	Titanium	Nickel Alloy	Bronze
Acids	Good	Excellent	Excellent	Poor
Alkalis	Good	Excellent	Excellent	Medium
Organic Solvents	Excellent	Excellent	Excellent	Good
High Purity Water	Good	Excellent	Good	Poor
Oxidizing Gases	Medium	Excellent	Excellent	Poor
Corrosive Gases	Medium	Excellent	Excellent	Poor

7. Product Selection Guide

(Micron • Material • Shape • Application)

Here we will list some advices based on your different pore size, condition, shape and

applications, you can check detail as following :

7.1 How to Choose Micron Rating

Micron Size	Recommended Use
0.1–0.5 µm	Ultra-fine gas filtration (semiconductor, lab analyzers)
1–5 µm	Gas analyzers, flame arrestors, pressure equalizers
10–20 µm	Sensor protection, gas sampling systems
20–40 µm	General gas & liquid purification
60–100 µm	Sparging, aeration, diffusion

7.2 How to Choose Material

Requirement	Recommended Material
High corrosion resistance	Titanium / Nickel Alloy
High temperature (400–600°C)	Titanium / Nickel Alloy
Cost-sensitive projects	316L / Bronze
High purity applications	Titanium
Strong pressure & mechanical load	316L / Nickel Alloy
Semiconductor gases	Titanium

7.3 How to Choose Shape

Shape	Use Case
Disc	Gas sampling, inline filtration
Tube / Cylindrical	Sparging, diffusion, pressure equalization
Cup / Cone	Sensor protection, flame arrestors
Cartridge	High flow industrial systems
Block / Plate	Chemical reactors, high-temperature filtration

7.4 How to Choose Based on Industry

Industry	Recommended Filter Type
Semiconductor	Titanium porous tube/disc, 0.1–5 µm
Gas analyzers	316L tube/disc, 1–20 µm
Vacuum systems	316L KF/VCR filters
Chemical plants	Ni-alloy cartridges
Environmental monitoring	316L sensor housings
Sparging systems	20–100 µm porous tubes

8. Flow Rate & Pressure Drop Curves

Here are generalized flow characteristics based on typical HENGKO porous metal filter structures (actual curve depends on OD/ID/thickness/micron grade):

8.1 Gas Flow Curve (Example: 316L, 10 µm)

Flow increases linearly at low pressure differentials
Enters laminar regime at 0.05–0.2 MPa
Stable plateau ensures no pulsation
Suitable for gas detection, sampling systems

8.2 Liquid Flow Curve (Example: 316L, 20 µm)

Higher pressure required due to viscosity
High stability under temperature fluctuation
Excellent for alcohols, hydrocarbons, solvents

Flow vs Pressure Drop by Gas and Liquid Flow Curve

9. Product Models

(Disc • Tube • Cone • Cartridge • Sensor Housing)

9.1 Porous Metal Disc Filters

Used in gas analyzers, vacuum systems, sampling, and sensor protection.

Parameter	Range
OD	5–120 mm
Thickness	0.3–5 mm
Micron Rating	0.1–100 µm
Material	316L / Ti / Bronze / Ni alloy

9.2 Porous Metal Tubes (Cylindrical Filters)

Ideal for sparging, aeration, flow equalization, and high-pressure filtration.

Parameter	Range
OD	3–80 mm
Length	10–1200 mm
Wall Thickness	0.5–3 mm
Micron Rating	0.2–60 µm

9.3 Porous Metal Cone / Cup Filters

Used in flame arrestors, sensor housings, gas detectors.

Parameter	Range
OD	3–50 mm
Height	5–60 mm
Micron	1–50 µm

9.4 Porous Metal Cartridges

Used in chemical plants, reactors, compressed gas filtration.

Parameter	Range
OD	20–80 mm
Length	50–1000 mm
End Caps	NPT / BSP / Flange / Custom
Micron	1–40 µm

9.5 Porous Metal Sensor Housing Filters

Used in temperature, humidity, dew point, and gas sensors.

Parameter	Range
Thread	M10 / M12 / 1/4 NPT / Custom
Micron	1–20 µm
Material	316L / Nickel Alloy
Housing Type	Cup / Tube / Customized

10. Application Industries

Porous metal filters are used across 50+ industrial sectors.

10.1 Semiconductor Manufacturing

CVD
PVD
Etching
ALD
Diffusion furnaces
High-purity gas lines

Titanium porous metal filters are preferred due to purity & corrosion resistance.

10.2 Gas Analysis & Detection

Used in:

CO₂ analyzer
O₂ / H₂ / CH₄ sensors
FTIR instruments
Portable gas detectors

Provides stable flow and prevents particle contamination.

10.3 Chemical Processing Plants

Used for:

High-temperature reactors
Solvent filtration
Catalyst protection
Corrosive gas filtration

Nickel alloy is ideal here.

10.4 Vacuum & VCR / KF Systems

KF16 / KF25 / KF40 porous protection filters
VCR gasket filters
Vacuum chambers

316L stainless steel is preferred.

10.5 Environmental Monitoring

Air quality sensors
Meteorological stations
Water testing systems

Porous metal prevents dust, insects, and droplets from entering sensors.

10.6 Sparging & Aeration Systems

For mixing gases into liquids (bioreactors, chemical reactors, labs).

Fine bubble diffusion
Highly uniform distribution
No clogging

Porous metal tubes (20–100 µm) work best.

11. Why Customers Switch to HENGKO

Porous metal filters are used across semiconductor, petrochemical, environmental, gas analysis,

and industrial automation systems.

Many global companies use proprietary porous metal elements, but HENGKO provides

full compatibility and cross-reference replacements with equal or superior performance.

Feature	MOTT / Ames / Others	HENGKO
OEM Customization	Limited	Unlimited (full OEM/ODM)
Delivery Time	Slow	Fast, flexible
MOQ	Medium–High	Low MOQ available
Cost	Higher	More cost-effective
Engineering Support	Strong	Strong + Faster + Flexible
Sensor Housing OEM	Rare	Specialized

11.1 OEM / ODM Custom Service

OEM/ODM is the core of HENGKO’s porous metal business.
We support full customization, including:

Customization Parameters

Custom Parameter	Description
Micron Rating	0.1–100 µm (precise PSD control)
Material	316L / Bronze / Titanium / Monel / Inconel
Dimensions	OD/ID/Length/Thickness totally customizable
Shapes	Disc, tube, cone, cup, cartridge, block
Thread Interface	NPT, BSP, UNF, M10/M12, or custom
Surface Finish	Electropolish, passivation, polishing
Welding	Laser welding, TIG welding
Pore Structure	Controlled porosity (10–55%)
Flow Performance	Designed according to pressure drop targets
Logo / Labeling	OEM print, laser marking
Packaging	Industrial PE, dust-proof, cleanroom options

11.2 OEM Process Flow

1.Requirement Collection
Micron rating / material / drawings / environment / flow target

2.Design & Simulation
Flow rate, porosity distribution, mechanical load analysis

3.Prototype Fabrication
Small-batch samples (1–20 pcs)

4.Testing & Validation
Pressure, chemical, and dimensional accuracy tests

5.Mass Production
Vacuum sintering + CNC + welding + QC

6.Packaging & Shipment
Industrial export packaging

FAQ – Common Engineering Questions

1. What is the standard micron rating range of porous metal filter ?

HENGKO porous metal filters are available from 0.1 µm to 100 µm, with narrow PSD for stable, repeatable filtration performance.

2. Can porous metal filters be cleaned and reused?

Yes. They can be cleaned by:

*Back-flushing
*Ultrasonic cleaning
*Chemical cleaning (acid/alkali depending on material)
*High-temperature baking

This makes them highly cost-effective compared to disposable filters.

3. What is the maximum temperature resistance?

Material	Max Temperature
316L	400–500°C
Titanium	Up to 600°C
Nickel Alloy	Up to 600°C
Bronze	~250°C

4.What pressure can porous metal filters withstand?

Depending on OD/ID and thickness, they can withstand up to:

*10–30 MPa (316L tubes)
*5–20 MPa (discs and cones)

Special high-pressure models available on request.

5.Are porous metal filters suitable for corrosive gases or liquids?

Yes.
316L is suitable for general industrial chemicals.
Titanium and Nickel alloys are recommended for:

*Acidic gases
*Oxidative gases
*Corrosive liquids
*High-purity chemicals

6.Can you manufacture based on drawings or samples?

Absolutely.
We accept:

*2D/3D CAD files
*STEP/IGES
*Physical samples
*Reverse engineering requirements

7.What is the typical lead time?

*Samples: 7–12 days

*Mass production: 15–25 days

*Large OEM orders: negotiated based on volume

8.Do you provide OEM branding and labels?

Yes, we support:

*Laser-etched logos

*Private label packaging

*OEM barcode printing

9.What industries use porous metal filters?

*Semiconductor
*Gas analysis
*Chemical plants
*Environmental monitoring
*Fuel & hydrogen systems
*Vacuum systems
*Laboratory & biotech

10.How can I get a technical quote?

You can email your project details directly to: ka@hengko.com

Ready to Start Your Porous Metal Filter Project?

We provide full OEM/ODM engineering support, from micron rating design to complete sintered metal assembly.
Whether you need 316L, Titanium, or Nickel alloy porous filters, our technical team can help you build the right solution.

Email us your requirements: ka@hengko.com

- WhatsApp/WeChat support available upon request

- Drawings • Specs • Samples • Customized Designs

HENGKO – Your Trusted Porous Metal Filter OEM Factory

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