0102030405
Sintered PTFE Filter Elements from China Factory - High Quality, Chemical Resistant, and Reliable Suppliers
Application of Sintered PTFE Filter
| Parameters | Specification Range |
|---|---|
| Diameter (mm) | 20, 25, 30, 35, 40, 45, 50, 60, 1000 (customizable) |
| Length (inch) | 5“, 10”, 20“, 30”, 40” (customizable to 1500mm) |
| Filtration accuracy (μm) | 0.1, 0.3, 0.45, 1, 3, 5, 10, 20, 30, 50, 80, 100 |
| Porosity | 30%-55% |
| Temperature range | -190℃~260℃ (short-term up to 300℃) |
| Pressure Resistant Strength | 0.3-0.8MPa |
| Interface Type | M20, M30, 222, 226, Flush, Platen (Customizable) |
Production Process Sintered PTFE Filter
1. Raw material preparation
Pure PTFE powder is used, sieved and premixed.
2. Press molding
Fill the powder into the mold and preform it into tube or bar embryo under high temperature (50-80℃) and high pressure.
3. Sintering process
Drying zone (100-250℃): remove solvent oil and other impurities.
Sintering zone (350-400 ℃): high-temperature molten particles, forming a uniform porous structure.
Cooling zone: Slowly cool down to room temperature to prevent cracking.
4. Post-treatment
Etching (optional): Enhance surface properties (e.g. anti-adhesion) by chemical treatment.
Cleaning and testing: Removal of residues and testing for airtightness and accuracy.
Advantages Sintered PTFE Filter
1. Corrosion resistance
Resistant to strong acids (e.g. sulfuric acid, hydrochloric acid), strong bases and organic solvents.
2. High temperature stability
Long-term working temperature up to 200℃, support steam sterilization.
3. High porosity and flow rate
porosity of more than 50%, fluid flux is 30% higher than metal cartridge.
4. Easy to clean
smooth surface like wax, impurities are not easy to adhere to, can be repeatedly cleaned and regenerated.
5. No risk of degranulation
smooth inner and outer surfaces, no particles falling off to contaminate the fluid.
6. Ozone resistance
suitable for ozone sterilization environment (such as pharmaceutical, food industry).
Parameter of Sintered PTFE Filter
| Fields | Specific Applications |
|---|---|
| Pharmaceutical industry | Water filtration for injection, decarbonization of pharmaceutical solution, sterile air filtration. |
| Chemical industry | Aluminum hydroxide, phosphor and other catalyst filtration, acid and alkali solution fine filtration. |
| Food & Beverage | Wine clarification, edible oil filtration, food additive purification. |
| Environmental Protection & Wastewater | Industrial wastewater treatment (e.g., oily wastewater), exhaust particulate interception. |
| Electronics & Semiconductors | Ultrapure water preparation, chemical filtration (e.g. photoresist). |
| Energy & Oil | Electrolyte filtration (lithium batteries), oilfield reinjection water treatment. |
Frequently Asked Questions (FAQ)
What is a Sintered PTFE Filter?
A Sintered PTFE Filter is a highly porous filtration element manufactured from pure polytetrafluoroethylene (PTFE) powder. It is formed through compression molding and high-temperature sintering, offering exceptional chemical resistance and structural integrity.
What chemical media can Sintered PTFE Filters resist?
These filters feature outstanding corrosion resistance. They can withstand strong acids (such as sulfuric and hydrochloric acid), strong bases, organic solvents, and highly reactive gases like ozone without degrading.
What is the operating temperature range for Sintered PTFE Filters?
The standard continuous operating temperature range is -190℃ to 260℃. However, they can tolerate short-term exposure up to 300℃, making them suitable for high-temperature fluid processing and steam sterilization.
How do you clean and regenerate a Sintered PTFE Filter?
Because PTFE has a smooth, wax-like, non-stick surface, contaminants do not easily adhere. The filter can be cleaned and regenerated multiple times using physical backwashing, ultrasonic cleaning, or chemical washing with acids, bases, or solvents.
Is there any risk of particle shedding (degranulation) during filtration?
No. Due to the high-temperature sintering process, the PTFE particles fuse together uniformly. The resulting smooth inner and outer surfaces ensure there is no risk of degranulation, preventing secondary contamination of the filtrate.