China Suppliers Precision Sintered Powder Filter for Micro-Particle Removal - Factory Direct Quality
Product Description
Corrosion resistance covering PH2-12, temperature resistance 500 ℃, suitable for petrochemical, food processing and other scenes.
Corrosion resistance to aqua regia and seawater, temperature resistance to 600°C in dry state, preferred in pharmaceutical and seawater desalination fields.
High temperature resistance to 980 ℃, chlorine corrosion resistance, dedicated to high temperature catalytic reaction systems (Inconel, Hastelloy).
Porosity 35-45%, thermal conductivity of 380W/(m-K), suitable for explosion-proof environments.
Monel alloy (Ni-Cu), ferro-aluminum alloy, etc. to meet the needs of special working conditions.
How is our sintered powder filter structure?
Through gradient sintering technology to realize the precise distribution of pores (pore size 0.22-200μm) and a porosity range of 28-50%:
Outer diameter Φ5-200mm (customizable to Φ1000mm), length 1-15m welded molding, featuring an axial flow channel design to reduce pressure drop.
Five-layer sintered mesh (protective layer + precision control layer + dispersion layer + double-layer reinforcement layer) to achieve compressive strength ≥ 8MPa.
What is the application of our sintered powder filter?
PTA mother liquor recovery: 316L material filter element intercepts ≥0.5μm catalyst particles.
Crude oil pre-filtration: Monel alloy is resistant to hydrogen sulfide corrosion.
Aseptic air purification: Titanium filter element is FDA approved, with a surface roughness Ra≤0.8μm.
Terminal filtration: 0.22μm precision PTFE cartridge realizes bacterial retention rate >99.99%.
Ultrapure water preparation: Gradient pore titanium cartridge removes ≥0.1μm particles.
High-purity gas filtration: Nickel-based alloy cartridge is resistant to corrosion of electronic special gas.
Beer clarification: Five-layer sintered mesh to achieve turbidity <0.5EBC.
Fruit juice filtration: 316L cartridge passes 3A sanitary certification.
How is our Sintered Powder filter Production Process?
Metal powder (316L, titanium alloy, or copper-based alloy) of 20-100 mesh is optimized by ball mill/screening. We add 5-10% volatile agent (paraffin) or molding agent, mixing for 1-3 hours. For gradient cartridges, layered stacking of coarse (≤100 mesh), medium (200-300 mesh), and fine (≥300 mesh) powders forms 1-3mm raw embryo sheets via casting.
Cold isostatic pressing presses mixed powder in high-speed steel molds under 500MPa pressure to form hollow cylindrical structures (compactness >92%). Gradient structures are made via 3D printing or casting (e.g., 30% outer to 50% inner porosity), improving dirt holding capacity by 30%. Billets are dried at 80-120°C to prevent cracking.
High-temperature treatment in vacuum sintering furnaces: stainless steel at 800-900°C, titanium alloy at 1250°C, nickel-based alloys at 1350°C for 2-6 hours. Key parameters include oxygen content <50ppm (argon protection), temperature uniformity ±5°C, and cooling rate <5°C/min. Multi-layer composite cartridges are coiled, welded, and embedded with low-precision security cartridges for double protection.
Mechanical laser cutting of end faces to Ra≤0.8μm, welding of M20/DOE standard interfaces (precision error <0.05mm). Surface treatments include electrochemical polishing or hydrophobic PTFE coating. Performance is verified via ISO 2941 permeability, ASTM F838 bacterial retention, and burst pressure testing (≥8MPa).
What are the Advantages of our sintered Powder filter?
Resistant to extreme environments (316L up to 500℃, pH 2-12; titanium up to 600℃ dry). High mechanical strength (0.8-3MPa compressive, 8MPa burst, >10,000 load cycles). High regeneration ability (ultrasonic cleaning >95%, thermal regeneration >50 times, extending lifespan 3-5 times).
Gradient pore design (5μm outer, 2μm middle, 0.22μm inner) delivers terminal filtration with low pressure drop (0.08ΔP). Five-layer composite mesh increases dirt holding capacity 3-5 times. Memory alloy cartridges allow ±5μm dynamic pore adjustment.
Raw material utilization rate >98%, saving 40% energy compared to casting. Rapid prototyping and 3D printing shorten the cycle by 50% for custom structures. Modular design supports online replacement, reducing maintenance costs by 60%.
Typical application scenarios
Interception of ≥0.5μm catalyst particles in PTA mother liquor recovery under 20MPa pressure. Desulfurization of crude oil using gradient nickel-based cartridges resistant to H₂S corrosion (1μm precision).
FDA-certified aseptic air filtration utilizing titanium cartridges (surface roughness Ra≤0.8μm). Terminal vaccine filtration using 0.22μm PTFE composite cartridges achieving >99.99% bacterial retention.
Ultrapure water preparation in semiconductors removing ≥0.1μm particles (resistivity >18MΩ-cm). Aviation hydraulic systems using multi-layer sintered mesh cartridges resistant to -196℃ liquid nitrogen.
Frequently Asked Questions
We offer filters in Stainless Steel (304L/316L), Titanium and titanium alloys, Nickel-based alloys (Inconel, Hastelloy), Copper-based alloys, and special alloys like Monel to suit various temperature and chemical requirements.
Our filters provide a filtration precision range of 0.22 to 200μm (with PTFE reaching 0.3μm). They can withstand extreme temperatures ranging from -196℃ up to 900℃ (specifically for nickel-based alloys).
The gradient design features larger pores on the outer layer (e.g., 5μm) to trap larger particles, a middle control layer (2μm), and a fine inner layer (0.22μm) for terminal filtration. This structural innovation reduces pressure drop to 0.08ΔP and increases dirt holding capacity by 3 to 5 times.
Yes, they have excellent regeneration capacity. They support ultrasonic cleaning with an efficiency greater than 95%, and can undergo high-temperature burning regeneration more than 50 times, offering a lifespan 3-5 times longer than traditional cartridges.
Our filters possess high mechanical strength with a compressive strength of 0.8-3MPa, a burst pressure resistance of up to 8MPa, and can withstand alternating loads for over 10,000 cycles.
For pharmaceutical use, our titanium filter elements are FDA approved with a surface roughness of Ra≤0.8μm. For food and beverage applications, such as fruit juice filtration, our 316L cartridges pass 3A sanitary certification.