Retaining-Ring Tubing Assemblies
FOREACH retaining-ring tubing assemblies combine matched fittings, retaining sleeves, sealing washers and tubing for in-vitro diagnostic and automated analytical instruments. The sleeve and washer secure and seal the tube end. Equipment development, assembly to drawing and batch production are supported.
Both 6-40 UNF and HSF6 retaining-ring configurations can be paired with FEP, PTFE or black PTFE tubing. The 6-40 UNF configuration uses a PEEK fitting and 1.6 mm OD tubing. HSF6 provides M6×1 or 1/4-28 UNF threads with 1.6, 2.0, 2.5, 3.0 or 3.2 mm OD tubing as specified. SUS and PEEK sleeves and washers are matched by model; ID and OD are selected as listed pairs. Specify length, A/B connections, stop tubes and identification.
FOREACH holds ISO 9001 and ISO 13485 quality management system certifications.
Typical Applications:
Reagent line connections, Cleaning-fluid line connections, Internal instrument fluid connections, Custom fluid-path assembly
Assembly Parameters
| Tubing material and appearance | Transparent FEP, natural PTFE, black PTFE |
|---|---|
| Connection structure | Retaining sleeve and sealing washer |
| 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) |
| Retaining-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 | Stop tubes, heat-shrink labels |
Tube Size Combinations
| Material / Tube OD (mm) | Matching Tube ID (mm) |
|---|---|
| Transparent FEP · 1.6 | 0.3 / 0.5 / 0.8 / 1.0 |
| Transparent FEP · 2.0 | 1.0 |
| Transparent FEP · 2.5 | 1.5 |
| Transparent FEP · 3.0 | 2.0 |
| Transparent FEP · 3.2 | 1.6 |
| Natural PTFE · 1.6 | 0.5 / 0.8 / 1.0 |
| Natural PTFE · 2.0 | 1.0 / 1.2 |
| Natural PTFE · 2.5 | 1.5 / 1.7 |
| Natural PTFE · 3.0 | 2.0 |
| Natural PTFE · 3.2 | 1.6 |
| Black PTFE · 1.6 | 0.8 |
| Black PTFE · 2.0 | 1.0 |
| Black PTFE · 2.5 | 1.5 |
| Black PTFE · 3.0 | 2.0 |
| Black PTFE · 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.
Retaining-Ring Tubing Applications & Customization
Equipment development, assembly to drawing, sample development and batch production are supported.
Instrument fluid-path integration
Assemblies for in-vitro diagnostic and automated analytical instruments are selected against the actual reagent, cleaning fluid and connection requirements.
Tubing configuration
Select material, dimensions, length and end connections for the installation.
Assembly drawings and dimensions
Provide tube ID/OD, finished length and tolerance, length measurement datum, A/B port drawings, fitting materials, threads and installation space. Show stop and label positions and dimensions on the assembly drawing.
Fluids, pressure and temperature
Specify the working fluid, concentration, cleaning fluid, contact time, pressure, temperature and inspection requirements to confirm wetted materials and the complete assembly.
Installation and mating ports
Install the sleeve and sealing washer in the specified sequence and orientation using the designated tools. Confirm tube OD, retaining-ring kit and port as a matched connection.
Quality documents and delivery
FOREACH holds ISO 9001 and ISO 13485 quality management system certifications. Applicable REACH and RoHS reports and material safety data sheets (MSDS) can be supplied for relevant connection components according to material and model. Dimensional inspection, seal testing, identification and packaging requirements for samples and batches are agreed for each project.
Submit your requirements
Prepare an assembly drawing, port drawing or BOM, together with sample quantity, batch requirements and acceptance criteria.
Use the fluid resistance calculator for preliminary estimates when comparing how tube diameter or length affects pressure drop.
Estimate fluid resistance2D Drawing Not Available Yet
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Frequently Asked Questions
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.
Submit your requirements
Prepare an assembly drawing, port drawing or BOM, together with sample quantity, batch requirements and acceptance criteria.