How can different black tubing lines be identified?

Use text, numbers or heat-shrink identification to distinguish fluid lines. Show the marking content and its position relative to ends A/B on the assembly drawing.

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.

Black PTFE Compression-Ring Tubing Assembly

FOREACH black PTFE compression-ring tubing assemblies combine black PTFE tubing, threaded fittings, compression rings and sealing ferrules for reagent lines requiring light shielding in in-vitro diagnostic (IVD) and automated analytical instruments. Reference tubing IDs span 0.8–2.0 mm, with ODs of 1.6, 2.0, 2.5, 3.0 and 3.2 mm. Select finished length and end connections using specified ID/OD pairs.

Select a PEEK 6-40 UNF configuration for 1.6 mm OD tubing or HSF6 with M6×1 or 1/4-28 UNF threads. Match the compression-ring kit to the tubing and port. Evaluate shielding requirements together with reagent-sensitive wavelengths and tube-end connections. Protective sleeves, stop tubes and text labels can support routing and line identification. Samples to drawing 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:

Reagent lines requiring light shielding, Black PTFE compression-ring connections, Instrument port integration, Identified fluid-path assembly

Tubing material and appearance	Black PTFE
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

Black PTFE
Tube OD (mm)	Matching Tube ID (mm)
1.6	0.8
2.0	1.0
2.5	1.5
3.0	2.0
3.2	1.6

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

Confirm performance for the reagent-sensitive wavelengths and actual shielding requirements. Black appearance alone does not replace light-shielding validation of the complete fluid path.

Submit your requirements

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

Customization Request