2:1 PFA Heat Shrink Tubing
High-purity 2:1 PFA heat-shrink tubing for semiconductor fluid handling, analytical instruments and chemical-resistant sleeving.
2:1 PFA heat-shrink tubing is the high-purity end of the fluoropolymer range. With a 2:1 recovery ratio it can drop over a connector or fitting and close down onto a smaller diameter, which is why it is used on semiconductor wet-process lines, analytical instruments and chemical-handling equipment where leachables and ions cannot be tolerated.
PFA resists virtually all chemicals and survives continuous heat well above what polyolefin or even FEP handles, so it is specified where the fluid or vapour would attack other polymers. We treat this as a high-end, low-volume line: the qualification is on purity, dimensional control and supplier approval, and the route in is the semiconductor tool subsystem and fluidics integrators rather than a catalogue search.
Technical specifications
| Material | PFA (perfluoroalkoxy) fluoropolymer |
| Shrink ratio | 2:1 |
| Recovered ID | Sub-millimetre to tens of mm |
| Wall thickness | Thin and standard wall on request |
| Continuous temperature | Up to ~260 C |
| Purity | High-purity, low ion / particulate grade available |
| Recovery method | Heat shrink -- controlled temperature profile |
Applications by industry
- Semiconductor wet-process and fluid-handling lines
- Analytical and laboratory instrument sleeving
- Chemical-resistant protective covering
- High-purity gas and liquid line marking
- Medical device high-purity sleeving
- Corrosive-environment wire and probe protection
Why PFA, and why 2:1
PFA carries the chemical resistance of PTFE with better melt-processability and a higher purity profile than FEP, which is why it is the default for semiconductor fluidics. The 2:1 ratio matters mechanically: it lets one size drop over a bulky fitting or ferrule and recover onto a smaller tube, cutting the number of stocked diameters. Against a 1.5:1 or 4:1 tube, 2:1 is the general-purpose middle that covers most fitting-to-tube transitions.
Purity and recovered-ID review
For semiconductor use the limiting factors are ions and particulates, not just dimensions. We offer a low-ion, low-particulate grade with clean-cut ends, and hold recovered ID to a stated tolerance. Specify recovered ID and wall, not just the supplied (expanded) size, and state the process purity class.
Inspection and traceability
We state the control plan with you. Batch traceability links the resin lot to the finished tube and the inspection record.
- Recovered ID and wall checked to stated tolerance
- Low-ion and low-particulate grade for high-purity use
- Clean-cut ends on request
- Lot traceability to incoming resin certificate
- Dimensional report on request
Related components
PTFE / FEP / PFA Heat Shrink
Full fluoropolymer range.
Polyimide Tubing
Higher temperature ceiling for precision use.
PTFE Tubing for Medical Devices
Non-shrink PTFE for device use.
Common questions
PFA vs PTFE heat shrink -- which to choose?
PFA offers higher purity and easier processing than PTFE while keeping near-equal chemical and temperature resistance. Choose PFA for semiconductor and high-purity fluid use.
What is the 2:1 ratio for?
It lets one size fit over a larger fitting and recover onto a smaller tube, reducing stocked diameters on fitting-to-tube transitions.
What temperature can PFA heat shrink take?
Continuous use up to about 260 C, depending on wall and grade.
Is it clean enough for semiconductor use?
A high-purity, low-ion and low-particulate grade is offered; state the process purity class when quoting.
PFA heat shrink applications?
Semiconductor wet-process lines, analytical instruments, chemical-handling equipment and high-purity sleeving.
Engineering Guides & Selection Notes
Related technical articles that help specify this product.
Get pricing for 2:1 PFA Heat Shrink Tubing
Send recovered ID, wall, ratio, purity class and annual volume. We confirm grade, capability and sample lead time.