PFA Straight Union (Compact, Reducing Union, Compression Fitting)
CYLEX’s PFA Straight Union is engineered for critical fluid handling where space is limited and corrosion resistance is paramount. This compact, reducing compression fitting creates a secure, leak-tight seal between two different sizes of PFA tubing. Manufactured from high-purity PFA resin, it is ideal for ultra-pure and aggressive chemical applications in semiconductor, pharmaceutical, and chemical processing industries. Its ferrule-less compression design ensures easy installation and reliable performance.
CYLEX PFA Beaded Fitting features an innovative multi-seal design, ensuring a highly reliable sealing connection. It also features a unique nut position indicator and anti-loosening mechanism, and is fully proprietary.
CYLEX supports small-batch customization, offers discounts for large quantities, fast delivery, and provides guaranteed after-sales service.
Get a quote or inquire for more information about custom processing of PFA Beaded Fitting .
Processing Cycle:
7-14 days
Material:
PFA (Perfluoroalkoxy Alkanes)
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Categories :
PFA Straight Union (Compact, Reducing Union, Compression Fitting) Size
| Part No. | Tube O.D | Tube O.D | A (mm) | B (mm) | C (mm) | ØD (mm) | ØE (mm) | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| D-G2-SU16S-6-FA | 1″ | 3/8″ | 83 | 22.8 | 47.5 | 30.1 | 8 | ||||
● Wetted parts: imported PFA. | |||||||||||
The CYLEX PFA Compact Reducing Union is a premium solution for connecting and reducing tubing lines in tight spaces. Made from 100% virgin PFA, this fitting excels in handling ultra-pure water, aggressive acids, bases, and solvents without introducing contaminants or succumbing to degradation. Its space-saving design is perfect for complex manifold systems and equipment with limited access.
Applications:
● Semiconductor Manufacturing: UPW, CMP slurries, etchants, strippers.
● Pharmaceutical & Biotech: Buffer solutions, culture media, WFI (Water for Injection), CIP/SIP systems.
● Chemical Processing: Transfer of high-purity acids, bases, and solvents.
● Analytical Equipment: HPLC, ICP-MS, and other instruments requiring inert fluid paths.
● Solar/PV Manufacturing.
Why Choose CYLEX PFA Fittings?
● Extensive Inventory: Shorten lead times and ship quickly
● Expert Technical Support: Our team of engineers provides application consulting and solutions
● Customization: Custom sizes and configurations available upon request
Need a Quote or Custom Size? ✉️ Contact CYLEX Today!
Features Advantages Easy to assemble Consistent and repeatable fitting composition All wetted parts are PFA Broad chemical compatibility Rugged thread design No cross-threading, quick threading, increased sealing force Unique seal design Non-wetted inserts reduce entrapment, leak points and flow interruptions Nested cold expansion tool Increased efficiency and reduced operational effort Connection verification ring Visual and audible indications High temperature rating in various sizes Simplified product selection and compatibility with high temperature chemical processes Anti-stripping design for 1½” or 40 mm nuts Innovative design makes fitting assembly easier and increases connection security Test type Test conditions Acceptance criteria Results Burst pressure The medium pressure increases until leakage occurs No external leakage or rupture before intubation PASS
No external leakageCyclic pressure leak test 1/4″-11/4″:1241kPa(180psig)water@23°C
11/2″and 40 mm:1034 kPa (150 psig)water@23°CNo external leakage after 1 million cycles at 1.5 times the rated pressure PASS
No external leakage1/4″-1 1/4″:414 kPa (60 psig) Thermal oil @200°C
11/2″and 40 mm:414 kPa (60 PSig)Thermal oil @150°CHigh pressure leak test The immersion joint applies nitrogen pressure equal to 80% of the pipeline burst pressure No external leakage allowed PASS
No external leakagePull-out tube test Apply a tensile load to the tubing/fitting until the tubing separates from the fitting 1/4″(178N) / 3/8″(400N)
1/2″(534N) / 3/4″(890N)
1″(1112N) / 11/4″(1557N)
11/2″ & 40mm(1779N)PASS Chemical test Sulfuric acid/fluorinated surfactant copper sulfate/25% per hour No external leakage after 2 million cycles PASS 
Surface Roughness Specifications & Surface Extractability Specifications
Surface roughness
Surface roughness specification
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 Surface extractable specifications
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.
Extractable ionic contamination
Surface extractable ionic contamination
Surface extractable ionic contamination 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 Extractable Metal Contamination
Surface extractable metal contaminants
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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