Which parts of a PFA assembly can be customized?

Specify finished length and tolerance, A/B fittings and threads, and the positions of sleeving, stop tubes and identification to suit the routing. Connection components are matched to the tube dimensions and ports.

How do I choose 6-40 UNF or HSF6?

6-40 UNF uses a PEEK fitting for 1.6 mm OD tubing. HSF6 offers M6×1 or 1/4-28 UNF. Match the port thread and tube OD to the specification table.

What is the assembly working-pressure limit?

Pressure depends on tubing, dimensions, temperature, connections and assembly. Provide the target pressure and fluid; use the confirmed rating and test report for that configuration.

PFA Compression-Ring Tubing Assembly

FOREACH PFA compression-ring tubing assemblies combine PFA tubing, matching threaded fittings, compression rings and sealing ferrules for reagent, cleaning-fluid and internal connections in in-vitro diagnostic (IVD) and automated analytical instruments. Reference tubing OD is 1.6 mm, with IDs of 0.5, 0.8 or 1.0 mm. Specify finished length and A/B end connections in the assembly drawing.

Select a PEEK 6-40 UNF miniature fitting or HSF6 configuration with M6×1 or 1/4-28 UNF threads to suit the port. Match the sleeve and sealing washer to the selected tube size, material and fitting model. Show positions and dimensions for protective sleeves, stop tubes, heat-shrink labels or coils in the drawing. Samples, equipment development and batch assembly are supported. Confirm working pressure and temperature for the specific dimensions, ports and complete assembly.

FOREACH holds ISO 9001 and ISO 13485 quality management system certifications.

Typical Applications:

PFA reagent line connections, End connections for 1.6 mm OD tubing, Custom compression-ring tubing, Internal instrument fluid connections

Tubing material and appearance	PFA
Connection structure	Compression ring and sealing ferrule
Matching fittings	HSF6 fittings, 6-40 UNF miniature fittings
Fitting material	PPS, PEEK; selected by series
Standard threads	M6×1, 1/4-28 UNF (HSF6 configuration)
Compression-ring kit	SUS and PEEK components matched to the kit model
Finished length	Custom to drawing, with specified length and tolerance
A/B ends	Fitting material, thread and connection type can be specified separately
Optional configurations	Coils, abrasion protection sleeves, stop tubes, heat-shrink labels

Tube Size Combinations

PFA
Tube OD (mm)	Matching Tube ID (mm)
1.6	0.5 / 0.8 / 1.0

These are available tubing sizes. Confirm end dimensions and mating ports against the assembly drawing.

Match fitting material, structure and thread to the corresponding model.

Miniature option: 6-40 UNF, PEEK fitting, 1.6 mm tube OD. Confirm the complete end configuration against the selected model.

Working pressure and temperature must be confirmed for the specific assembly configuration.

Matching fittings and 2D drawings

The table lists fitting series, threads and body materials for 1.6 mm tube OD as examples. Select the drawing by material and full model number; confirm matching parts for other ODs during customization.

Fitting series	Thread size	Nut material	Fitting drawing
HFL6	6-40 UNF	PEEK	View PDFHFL6-U40-16-PK-N
HSF	1/4-28 UNF	PEEK	View PDFHSF-U28-16-PK-N
HSF6	M6×1	PPS	View PDFHSF6-M6-16-PS-B
HSF6	1/4-28 UNF	PEEK, PPS	PEEK · PDFHSF6-U28-16-PK-N PPS · PDFHSF6-U28-16-PS-B

Frequently Asked Questions

The currently listed reference OD is 1.6 mm, with 0.5, 0.8 or 1.0 mm ID. For other sizes, provide a drawing so an engineer can review tubing availability and end connections.

Submit your requirements

Prepare an assembly drawing, port drawing or BOM, together with sample quantity, batch requirements and acceptance criteria.

Customization Request