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1. Product Introduction
PEEK diffuser is a fluid and gas uniform shunt-diffusion component made of high-performance polyether-ether-ketone (PEEK) base material, manufactured by high-precision CNC turning & milling integrated finishing. A sintering process is not required. Aperture, hole layout, configuration and overall dimension can be customized according to working conditions with high machining accuracy and good consistency. It is mainly applied for fluid pressure stabilization, buffering, mixing and uniform gas-liquid distribution, effectively avoiding eddy current and biased flow. Benefiting from PEEK’s comprehensive advantages including high-temperature resistance, strong corrosion resistance, high purity & low leaching, high strength and creep resistance, it can replace traditional metal and PTFE diffusers for various harsh industrial conditions. Both mass-produced standard parts and non-standard custom parts are available, featuring easy assembly and long service life.
2. Physical & Chemical Properties
Property Category
Test Item
Parameter / Description
Physical Properties
Density
1.30 g/cm3
Water Absorption (24 h)
≤0.10%, barely absorbs water, no swelling
Continuous Operating Temperature
-40℃ ~ 250℃
Short-term Peak Temperature
Short-term Peak Temperature
Mechanical Properties
Tensile Strength
92-97 MPa
Flexural Modulus
3.7 GPa
Compressive Strength
118 MPa
Wear & Creep Resistance
Low friction coefficient, resistant to deformation and cracking under high pressure & high temperature
Chemical Properties
Corrosion Resistance
Resistant to most strong acids, strong alkalis and organic solvents; hydrolysis-free, rust-free, low impurity leaching; NOT resistant to high-concentrated sulfuric acid
Leaching Performance
Extremely low metal-ion leaching, free of particulate contamination, meets high-purity process requirements
Safety Properties
Flammability Class
UL94 V-0, self-extinguishing
Insulation / Anti-static
Virgin grade is insulating; carbon-fiber filled grade achieves anti-static performance
3. Typical Application Fields
Industry
Key Application Scenarios
Selection Advantages
Semiconductor
Wafer processing equipment, high-purity gas distribution for chamber, fluid diffusion under vacuum process, precision flow-splitting components
Ultra-low ion leaching, clean & contamination-free, stable and uniform air flow, suitable for high-end high-purity processes
Analytical & Laboratory Instruments
Chromatography analyzers, fluid mixing in reaction vessels, gas buffering, flow-splitting parts for micro-scale test devices
High dimensional accuracy, no medium interference, resistant to chemical reagents for precision detection
Fine Chemical Equipment
Reaction vessels for corrosive media, rectification & extraction units, uniform chemical-fluid distribution, waste-gas treatment flow-splitting
Strong corrosion & high-temperature resistance, no deformation or failure in long-term service
New Energy
Lithium-battery electrolyte circulation system, electrochemical test set-ups, fluid diffusion parts for hydrogen-energy equipment
Corrosion-resistant, free of impurity leaching, preserves purity of electrolyte and high-purity media
High-purity Water Treatment
High-purity-water distribution, flow-splitting & pressure-stabilizing diffusion for water-purification systems
Non-hygroscopic, no substance leaching, prevents secondary contamination, excellent stability
Medical & Pharmaceutical Equipment
High-temperature sterilization units, pharmaceutical fluid transfer, flow-splitting assemblies for aseptic processes
Repeated high-temperature sterilizable, non-toxic & clean, complies with sanitary standards for pharmacy & medical devices
4. Selection & Design Guidelines
4.1 Material Selection Principles
Select material based on medium, temperature, pressure, cleanliness and anti-static requirements of working conditions.
• Virgin PEEK: Preferred for semiconductor, pharmaceutical, high-purity water treatment and precision instruments requiring high cleanliness and low leaching. Best general-purpose grade for normal temperature-pressure corrosive conditions.
• Glass-fiber filled PEEK: For high-temperature & high-pressure heavy-duty chemical applications for enhanced rigidity and compression resistance. Not recommended for ultra-high-purity service.
• Carbon-fiber filled PEEK: For flammable-explosive gas and static-prone environments, delivering anti-static, wear-resistant and high-strength performance for anti-explosion and high-friction working conditions.
4.2 Structural Design Points
• Dimensions: OD φ10-200 mm, height 5-150 mm; machining tolerance ±0.02~±0.05 mm. Custom shapes including disc, cylinder, sleeve, notch-lock / flange configurations are supported.
• Flow-hole design: Diffusion hole diameter 0.5-10 mm customizable with evenly-distributed holes. Single-stage or multi-stage gradient hole diameters can be adopted to guarantee uniform flow distribution according to flow-rate requirements.
• Mounting structure: Standard notch-lock positioning; custom thread, interference-fit and press-fit structures are available to fit different equipment chambers.
4.3 Working-condition Matching
Virgin PEEK for ambient-pressure high-purity applications; glass-fiber filled PEEK for high-temperature high-pressure heavy-duty service; carbon-fiber filled PEEK for anti-explosion / anti-static and high-wear-rate scenarios.
5. Operation & Maintenance
5.1 Installation Instructions
• Thoroughly clean diffusion holes before assembly to remove machining chips and dust. Ultrasonic cleaning is mandatory for high-purity applications.
• Never strike or squeeze forcibly to avoid local-stress-induced fracture. Reserve thermal-expansion clearance for high-temperature working conditions to prevent jamming or seizure.
• Install according to designated medium flow direction; ensure diffusion holes are unobstructed for proper diffusion performance.
• Do not apply excessive torque for threaded connections to avoid thread cracking or thread stripping.
5.2 Routine Maintenance & Storage
• Storage: Store indoors under dry ambient temperature, avoid long-term UV exposure. Keep sealed and dust-proof to prevent dust ingress into diffusion holes.
• Cleaning: Use pure water, ethanol or mild organic solvent for ultrasonic cleaning. Do NOT soak in high-concentrated strong-acid or strongCeramic‑Filled PEEK SHEET
