The PFA Union Tee is a tee made of fusible polytetrafluoroethylene (PFA). Its excellent corrosion resistance, high-temperature stability, and high purity make it widely used in applications requiring the highest standards of fluid purity and chemical stability. It is primarily used for connecting corrosive fluid pipes in the chemical, semiconductor, and pharmaceutical industries.
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| Part No. | Tube O.D. | Orifice (mm) | A (mm) | B (mm) | C (mm) |
|---|---|---|---|---|---|
| D-G1-UT4-FA | 1/4″ | 3.8 | 84 | 37.3 | 42 |
| D-G1-UT6-FA | 3/8″ | 6.3 | 89 | 39.7 | 44.5 |
| D-G1-UT8-FA | 1/2″ | 9.6 | 91 | 41.4 | 45.5 |
| D-G1-UT12-FA | 3/4″ | 16 | 112 | 50.5 | 56 |
| D-G1-UT16-FA | 1″ | 22.3 | 138 | 60.7 | 69 |
| D-G1-UT20T-FA | 1-1/4″ | 27.9 | 176.5 | 78.4 | 88 |
| D-G1-UT24T-FA | 1-1/2″ | 33.7 | 217 | 94.2 | 108.5 |
● 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. | |||||
● Corrosion Resistance
PFA material exhibits excellent resistance to most chemical solvents, strong acids and bases (such as HF and H₂SO₄), and high-temperature fluids, making it suitable for harsh environments such as chlor-alkali chemicals and wet etching.
● High-Temperature Stability
Long-term operating temperatures can reach 260°C, and short-term resistance to temperatures exceeding 300°C meets the high-temperature chemical transport requirements of the semiconductor industry.
● High Purity and Low Precipitation
The material boasts high purity and extremely low metal ion precipitation, meeting the stringent fluid purity requirements of the semiconductor and pharmaceutical industries.
● Mechanical Stress Resistance
Compared to FEP, PFA has higher melt strength and crack growth resistance, making it suitable for applications subject to vibration or lateral loads.
● Semiconductor Manufacturing
* Transporting wet etching chemicals such as HF and H₂O₂.
* Connecting high-purity PFA piping to prevent metal contamination of wafers.
* Suitable for transporting high-purity chemical solutions.
● Pharmaceutical Industry
* CIP/SIP (cleaning/sterilization in place) system with a zero-dead-spot design prevents bacterial growth.
* Enables liquid drug delivery without metal ion precipitation.
● Lithium Battery Production
* Electrolyte injection pipelines prevent metal impurities from affecting battery performance.
● Chlor-alkali Chemical Industry
* Handles wet chlorine gas and concentrated alkali, replacing easily corrosive metal valves.
* Suitable for small-flow corrosive media.
| 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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