The PFA Reducing Flared Elbow is a fitting designed for high-purity, corrosion-resistant fluid systems. Made of PFA, it features chemical inertness, high-temperature resistance (-200°C to 260°C), and low precipitation. Its key features include:
● Reducing design (connects pipes of different diameters, with concentric or eccentric options);
● Flared ends;
● Elbow turning capability.
Primarily used in the semiconductor, pharmaceutical, and chemical industries, its advantages include ultra-high cleanliness (compliant with SEMI standards), strong acid and alkali resistance, and solder-free installation.
CYLEX Plastics supports small batch customization, large quantity discounts, fast delivery, and guaranteed after-sales service. Send us your drawings today!
Get a quote or inquire for more information about custom processing of PFA Fittings.
| Part No. | Tube O.D. | Tube O.D. | Office (mm) | A (mm) | B (mm) | C (mm) | D (mm) | ||
|---|---|---|---|---|---|---|---|---|---|
| D-G1-UE6-4-FA | 3/8″ | 1/4″ | 3.8 | 42 | 37.3 | 39.7 | 44.5 | ||
| D-G1-UE8-4-FA | 1/2″ | 1/4″ | 3.8 | 47.5 | 44.4 | 37.3 | 42 | ||
| D-G1-UE8-6-FA | 1/2″ | 3/8″ | 6.3 | 44.5 | 39.7 | 43.4 | 47.5 | ||
| D-G1-UE12-6-FA | 3/4″ | 3/8″ | 6.3 | 44 | 39.7 | 49.7 | 57 | ||
| D-G1-UE12-8-FA | 3/4″ | 1/2″ | 9.6 | 47.5 | 41.4 | 49.7 | 56.5 | ||
| D-G1-UE16-8-FA | 1″ | 1/2″ | 9.6 | 47 | 41.5 | 62 | 70 | ||
| D-G1-UE16-12-FA | 1″ | 3/4″ | 16 | 56 | 50.5 | 62 | 70 | ||
| D-G1-UE20-16-FA | 1-1/4″ | 1″ | 22.3 | 80.5 | 72.7 | 78.4 | 88 | ||
| D-G1-UE24T-20T-FA | 1-1/2″ | 1-1/4″ | 27.9 | 107.5 | 94.2 | 78.7 | 86.5 | ||
● Wetted parts: Ultrapure PFA. ● Nut: Ultrapure PFA. ● Maximum working pressure: 125 PSIG (8.6 bar), see pressure/temperature table. ● Operating temperature range: -18℃~200℃, 1½ and above specifications are recommended to be used at a temperature below 150°C. | |||||||||
PFA (perfluoroalkoxy polymer) is an upgraded material from PTFE (polytetrafluoroethylene). It features a highly stable molecular structure, is virtually unreactive with all chemicals, and produces extremely low extractables, meeting the needs of high-purity fluid transmission.
● Flared Design: This flared design enables pipe connections, eliminating the need for additional seals and relying on the inherent elasticity of the material to form a seal. It is suitable for high-temperature and high-pressure environments.
● Reducing Elbow: Connects PFA tubing of different diameters while simultaneously changing the flow direction (typically a 90° bend), optimizing piping layout and reducing resistance.
● Corrosion Resistance: Resistant to strong acids (such as aqua regia and hydrofluoric acid), strong bases, organic solvents, and oxidizing substances, it is suitable for transporting corrosive chemicals.
Example: In the semiconductor industry, it is used to transport photoresists and corrosive gases, ensuring contamination-free piping.
● High Temperature Resistance
Long-term operating temperature range: -200°C to +260°C, with short-term temperature resistance higher (e.g., not exceeding 150°C in a sealed environment).
Example: Maintains structural stability during high-temperature sterilization processes (CIP/SIP), making it suitable for aseptic production in the pharmaceutical industry.
● Sealing Performance
The flared design combined with the low creep properties of PFA material maintains a stable seal under high temperatures and pressures, preventing leakage.
Example: US CYLEX brand products can withstand pressures up to 125 PSIG (8.6 bar), making them suitable for use in high-vibration or side-load environments.
● Low Extractables
Extremely low blank values for metal elements prevent contamination of high-purity reagents or reference materials, making them ideal containers for storing expensive reagents.
Example: In ICP-MS (inductively coupled plasma mass spectrometry) analysis, PFA containers reduce background interference and improve detection accuracy.
● Mechanical Strength
Superior creep and stress crack resistance compared to PTFE, extending service life. Example: When dropped from a height of 1.2 meters, the bottle remains intact and the cap remains intact, ensuring safety.
● Semiconductor Manufacturing
Transports ultrapure water, corrosive gases, and photoresist to ensure a clean environment for chip production.
Example: Connects photolithography machines to chemical supply systems to prevent particle contamination.
● Chemical Industry
Transports strong acids, bases, and organic solvents to handle high-purity reagents.
Example: In lithium battery electrolyte production, connects reactors to storage tanks to prevent metal ion contamination.
● Pharmaceutical and Biotechnology
Withstands CIP/SIP sterilization processes to ensure sterility in pharmaceutical production.
Example: In vaccine production, connects fermenters to purification systems to prevent microbial contamination.
● Food Processing
Suitable for applications with strict hygiene standards, such as dairy and beverages, and FDA-compliant.
Example: In beer brewing, connects mash tuns to fermenters to prevent metal ions from affecting flavor.
● Laboratory Equipment
Connects experimental instruments (such as ICP-AES and atomic absorption spectrometers) to ensure safe and accurate experimental procedures.
Example: In a geological sample digestion experiment, connect the digestion tube to the gas supply system to prevent cross-contamination.
| Advantage | Comparison with traditional materials (e.g., PVC, PP, metal) |
|---|---|
| Chemical inertness | Resistant to almost all chemicals, far exceeding stainless steel or polypropylene. |
| Cleanliness | Low extractables, no metal ion contamination, compliant with SEMI F57/F51 standards. |
| Temperature range | -200℃ to +260℃ (PTFE elbows typically only withstand +150℃). |
| Installation convenience | Flared design requires no welding, supports quick disassembly (e.g., VCR, DIN connectors). |
| Surface roughness specification | ||
|---|---|---|
| Component Description | SEMI F57 0622 Recommended value Ra (µm) | Typical test results Ra (µm) |
| Injection molded valve body | ≤0.35 | ≤0.30 |
| Machine-machined PTFE diaphragm | ≤0.35 | ≤0.20 |
| Injection molded fitting flow path | ≤0.35 | ≤0.25 |
| Machine-machined PFA valve body | ≤0.60 | ≤0.30 |
| Machine-machined PTFE valve body | ≤0.60 | ≤0.40 |
The test liquid used was ultrapure water and the test was carried out at 85°C. The parts were leached after the prescribed rinsing pretreatment. The immersion time was 7 days.
| Ion types | SEMI F57 0622 Recommended value (µg/m³) | Typical product measurement values (ultrapure water 85°C+5°C, 7-day leaching value) (µg/m³) |
|---|---|---|
| Ammonium ions NH4+ | ≤100 | <0.1 |
| Bromide ions Br− | ≤100 | <0.1 |
| Chloride ions Cl− | ≤100 | <3 |
| Fluoride ions F− | ≤20000 | <133 |
| Nitrate ions NO3 | ≤100 | <0.1 |
| Nitrite ions NO2 | ≤100 | <0.1 |
| Phosphate ions PO42− | ≤100 | <0.1 |
| Sulfate ions SO42− | ≤100 | <0.1 |
| Surface extractable metal contaminants | ||
|---|---|---|
| Test items (tcp-ms) | SEMI F57 0622 Recommended value (μg/m²) | Typical product measurement values (ultrapure water 85°C + 5°C, 7-day leaching value) (μg/m²) |
| Aluminum AI | ≤5 | <0.2 |
| Arsenic AS | ≤2 | <0.1 |
| Antimony Sb | ≤2 | <0.1 |
| Barium Ba | ≤15 | <0.2 |
| Boron B3 | ≤30 | <0.5 |
| Cadmium Cd | ≤2 | <0.01 |
| Calcium Ca | ≤10 | <0.21 |
| Chromium Cr | ≤1 | <0.2 |
| Copper Cu | ≤10 | <0.2 |
| Iron Fe | ≤5 | <0.2 |
| Lead Pb | ≤1 | <0.05 |
| Lithium Li | ≤2 | <0.2 |
| Magnesium Mg | ≤2 | <0.2 |
| Manganese Mn | ≤5 | <0.2 |
| Nickel Ni | ≤1 | <0.2 |
| Potassium K | ≤10 | <0.5 |
| Sodium Na | ≤10 | <0.5 |
| Strontium Sr | ≤0.5 | <0.05 |
| Titanium Ti | ≤2 | <0.1 |
| Tin Sn | ≤2 | <0.1 |
| Vanadium V | ≤2 | <0.01 |
| Zinc Zn | ≤5 | <0.2 |
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