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4mm-19mm
VSJOCO
A PFA spring tube consists of a high-purity perfluoroalkoxy inner layer reinforced with a stainless steel or coated steel wire spring sheath. This composite design addresses the inherent limitations of standard PFA tubing while retaining the material’s exceptional chemical inertness. All VSJOCO PFA spring tubes comply with FDA 21 CFR Part 177.1550 and USP Class VI standards, making them suitable for critical fluid transfer in pharmaceutical, semiconductor and chemical processing operations.
Standard PFA tubing has a minimum bending radius of 5× its inner diameter, leading to frequent kinking, flow blockages and premature rupture. Unreinforced tubing also lacks protection against mechanical crushing and vacuum pressure, resulting in unplanned downtime and costly replacements. VSJOCO spring-reinforced PFA tubing reduces these failures by 70% through a precision-engineered sheath that maintains structural integrity even at a minimum bending radius of 2× the tube diameter.
VSJOCO PFA spring tubes exhibit chemical stability second only to PTFE, with compatibility across the full pH range of 0-14. They withstand concentrated sulfuric acid, hydrofluoric acid, strong alkalis, organic solvents and oxidizers. This broad compatibility eliminates the need for multiple tubing types for different process media, reducing inventory complexity and preventing cross-contamination caused by material degradation.
These tubes operate continuously between -80°C and +200°C, with short-term temperature resistance up to 260°C. They maintain flexibility and structural integrity through repeated high-low temperature cycles, making them suitable for pharmaceutical CIP/SIP sterilization processes and semiconductor wafer cleaning operations that involve rapid temperature shifts.
The spring sheath, available in 304 or 316 stainless steel, provides resistance to mechanical crushing and vacuum pressure. The 2× diameter minimum bending radius allows for tight routing in confined equipment spaces without flow restriction. Custom options include PVC-coated steel wire for non-corrosive environments and Hastelloy springs for extreme chemical exposure.
The fully transparent PFA inner wall enables real-time visual monitoring of fluid flow, allowing operators to detect blockages or contamination immediately. With a surface tension of ≤19 dyn/cm, the inner wall prevents residue buildup even with high-viscosity media, ensuring complete material transfer and eliminating cross-contamination between batches.
Parameter | Standard Range |
Inner Diameter | 2mm - 50mm |
Spring Material | 304/316 Stainless Steel |
Pressure Rating | 0.3 - 0.8 MPa |
Standard Certifications | FDA, USP Class VI |
VSJOCO offers tailored solutions for specialized process requirements, including micro-bore tubing (<1mm) for precision dosing applications and high-pressure reinforced designs rated for ≥1.5 MPa. Our engineering team works directly with process engineers to develop tubing configurations that meet specific project parameters.
All products come with batch-specific certification reports to support regulatory compliance. Available certifications include SEMI F57 for semiconductor manufacturing and ISO 10993 for biocompatibility, ensuring alignment with the strictest industry requirements.
Used for ultra-pure chemical transfer, wafer cleaning equipment connections and photoresist delivery. The non-leaching PFA material prevents ion contamination that could reduce wafer yield, while the spring reinforcement withstands the tight routing requirements of cleanroom equipment.
Ideal for bioreactor process piping, CIP/SIP cleaning systems and active pharmaceutical ingredient transfer. The USP Class VI compliance and non-stick surface ensure product purity and facilitate effective cleaning between batches.
Suitable for reactor feed transfer, corrosive gas delivery and solvent recovery systems. The full pH range compatibility reduces the risk of leaks and equipment damage caused by chemical attack.
Used in flue gas sampling systems and wastewater analyzer connections. The temperature and chemical resistance ensure accurate sample collection and analysis in harsh environmental conditions.
Every VSJOCO PFA spring tube undergoes pressure testing, leak testing and material analysis before shipment. Our manufacturing facilities operate under ISO 9001 quality management systems, ensuring consistent performance across all production batches.
Standard specifications ship within 24 hours of order confirmation, while custom orders are completed in 7-15 days. We maintain global distribution centers to minimize lead times for process facilities worldwide.
Our team of fluid transfer specialists provides comprehensive support from initial selection through installation and ongoing maintenance. With over 10 years of industry experience, we offer practical solutions to complex process challenges.
Do not exceed the 2× diameter minimum bending radius
Avoid contact with sharp objects that could scratch the PFA inner wall
Use compatible fittings to ensure leak-free connections
For SIP applications, select 316 stainless steel spring sheaths
Inspect spring sheaths for corrosion or deformation every 3 months
Conduct pressure testing annually to verify structural integrity
Replace tubing immediately if scratches, discoloration or spring damage are observed
PFA offers better transparency and weldability than PTFE, while maintaining comparable chemical resistance. PFA also has a smoother inner surface that reduces residue buildup.
Yes, they withstand repeated SIP cycles at temperatures up to 135°C when equipped with 316 stainless steel spring sheaths.
Custom reinforced designs can achieve pressure ratings up to 3 MPa, depending on diameter and temperature.
Yes, standard size samples are available for process validation. Sample costs can be credited toward subsequent bulk orders.
Yes, we offer SEMI F57 certified versions specifically designed for semiconductor manufacturing applications.
