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Small-bore fluid systems often leave little room for error. When tubing is only a few millimeters in diameter, the quality of the connection can be influenced by details that may seem minor, including tubing dimensions, washer geometry, material properties, fitting design, and assembly conditions. For 1.6 mm tubing in particular, selecting a sealing component that matches the connection accurately can help create a more repeatable fluid path.

The Rigid Tubing Connections SH160-A is a PEEK washer developed for 1.6 mm tubing applications. With defined dimensional specifications and a compact structure, it is intended for precision fluid-control assemblies where controlled sealing interfaces and clean connection practices are important.

Why Small-Bore Connections Require Careful Component Matching

Reducing tubing size can be useful when equipment requires compact fluid paths, controlled flow volumes, or limited installation space. At the same time, smaller connection interfaces are less tolerant of dimensional variation. A small difference between the tubing, washer, and fitting may change the contact area or affect how pressure is distributed across the sealing interface.

A reliable connection therefore starts with dimensional compatibility rather than simply increasing tightening force. Excessive force may deform tubing or sealing components, while insufficient contact may leave a potential leakage path.

The washer acts as an interface within this assembly. Its inside diameter, outside diameter, and thickness need to correspond with the tubing and mating hardware so that the completed connection can function as intended. For repeated production, using a defined component instead of adapting a general-purpose washer can also make assembly conditions easier to standardize.

PEEK as a Material for Precision Fluid Components

Material selection becomes particularly relevant when a sealing component is used in contact with process fluids. PEEK is widely used in precision engineering applications because of its combination of mechanical properties, dimensional stability, and resistance to many chemical environments.

For a small tubing washer, maintaining geometry during assembly and service is important. If the material changes significantly under the application's mechanical, thermal, or chemical conditions, the original sealing relationship may also be affected.

The Rigid Tubing Connections SH160-A uses PEEK and is specified for tubing with a 1.6 mm outside diameter. The washer dimensions are 2.7 mm OD, 1.70 mm ID, and 1.4 mm thickness. These parameters give engineers a defined starting point when checking the compatibility of the washer with the tubing and fitting configuration.

Its natural color also provides a simple visual reference during component handling and assembly, particularly where operators need to distinguish materials or inspect components before installation.

Three Practical Variables Behind Connection Reliability

1. Tubing and Washer Dimensions

The first consideration is dimensional matching. The tubing outside diameter, washer inside diameter, and fitting geometry should be assessed as a complete system.

For the SH160-A configuration, the target tubing OD is 1.6 mm and the washer ID is 1.70 mm. The 2.7 mm outside diameter and 1.4 mm thickness must also be considered when determining how the washer sits within the connection.

Nominal diameter alone is not enough to confirm compatibility. Actual tubing tolerances and the design of the mating components should also be reviewed before production.

2. Material Compatibility

A washer may be mechanically suitable while still being inappropriate for a particular fluid environment. The media, temperature range, cleaning method, and expected service conditions should therefore be considered when selecting the sealing material.

PEEK can be an appropriate engineering material for many precision fluid-control applications, but final material selection should always be based on the complete operating environment rather than on the material name alone.

3. Assembly Quality

Even accurately manufactured components depend on proper installation. Tubing ends should be prepared consistently, sealing surfaces should be clean, and components should be correctly aligned before tightening.

Contamination, scratches, uneven tubing cuts, misalignment, or excessive assembly force can compromise the connection regardless of the washer's nominal specifications. For equipment produced in volume, controlling these assembly variables can be just as important as selecting the component itself.

A Product Family for Different Tubing Sizes

Fluid-control equipment does not always use one tubing diameter throughout the entire system. Using components from a related product family can make it easier to maintain a consistent approach when connection sizes change.

The SH series includes PEEK and SUS316 configurations for several tubing dimensions. SH215-A and SH215-C are intended for 2 mm tubing, with PEEK and SUS316 versions respectively. For 2.5 mm tubing, SH265-A and SH265-C provide corresponding material options, while SH320-A and SH320-C are available for 3 mm tubing.

Additional configurations are available for 3.2 mm tubing, including SH335-A, SH335-C, SH321-A, SH321-C, SH336-A, SH336-C, and SH340-C.

This type of product range can be useful for equipment manufacturers working with multiple connection sizes. Instead of sourcing unrelated sealing components for every tubing dimension, engineers can compare options within a more consistent component series.

Where a metal sealing component is preferred or required, SUS316 versions offer an alternative to PEEK. The appropriate choice depends on the fluid, temperature, mechanical requirements, cleaning process, and overall connection design.

Applications Where Connection Consistency Matters

Small-bore tubing connections are common in systems that require controlled fluid transfer and compact component layouts. Typical application areas include medical equipment, diagnostic instruments, analytical systems, laboratory equipment, environmental monitoring devices, and life science instruments.

In these environments, leakage can create problems that extend beyond fluid loss. A connection issue may influence test results, introduce unwanted contamination, interrupt an operating cycle, or increase maintenance requirements.

For analytical and diagnostic equipment, maintaining a controlled fluid path is particularly important because the connection is part of the system through which samples, reagents, gases, or other media may pass.

The cleanliness of the connection should also be considered during assembly. The zero-residue characteristic associated with this product family can be relevant in applications where unwanted material at the connection interface needs to be minimized. However, cleaning, validation, and compatibility requirements should always be established according to the actual equipment and application.

Precision Components Depend on Manufacturing Control

A washer may be a relatively small component, but dimensional consistency becomes important when it is used in repeated precision assemblies. Manufacturing controls therefore play a role in the overall reliability of small-bore fluid connections.

AIIBOOM technology develops and manufactures precision fluid-control components and customized solutions for medical devices, life sciences, diagnostics, analytical instrumentation, and environmental applications. The company has more than 20 years of industry experience and operates R&D centers in Shenzhen, China, and Sendai, Japan.

The Shenzhen R&D team focuses on new technology development, while the Sendai operation emphasizes process optimization. This combination supports both product development and manufacturing-process improvement.

Production facilities cover approximately 20,000 m² across locations in Dongguan, Guangdong, and Tongling, Anhui, China. ISO 9001 and ISO 14001 management systems are used to support quality and environmental management. The company also has more than 20 patent certificates and has worked with over 1,000 partners.

For manufacturers integrating small fluid-control components into different equipment platforms, this type of manufacturing background can be useful. Consistency is not limited to one washer; it involves material control, machining or forming processes, dimensional inspection, production management, and quality procedures.

How to Evaluate a 1.6 mm Tubing Washer

Before selecting a washer for a small-bore connection, several points should be checked.

First, confirm the actual tubing outside diameter and the fitting structure. For SH160-A, the specified tubing OD is 1.6 mm, while the washer dimensions are 2.7 mm OD, 1.70 mm ID, and 1.4 mm thickness.

Second, determine whether PEEK or another material is appropriate for the application. The fluid being handled, operating temperature, mechanical loading, cleaning process, and expected service conditions should all be included in the evaluation.

Third, check the complete connection rather than treating the washer as an independent part. Tubing tolerance, fitting geometry, washer dimensions, surface condition, and assembly force interact with one another. A component that appears suitable based on diameter alone may still require further testing within the actual fitting system.

For new equipment designs, prototype testing can help verify sealing behavior before the connection is moved into larger-scale production. For existing equipment, dimensional inspection and controlled assembly trials can help identify whether a sealing issue originates from the washer, tubing, fitting, or installation process.

Building More Repeatable Small-Bore Fluid Connections

Reliable sealing in small-bore tubing systems is usually the result of several controlled factors working together. Accurate dimensions establish the physical relationship between components, suitable materials support performance in the operating environment, and consistent assembly helps maintain the intended sealing interface.

For 1.6 mm tubing, Rigid Tubing Connections SH160-A provides a defined PEEK washer configuration with a 2.7 mm outside diameter, 1.70 mm inside diameter, and 1.4 mm thickness. These specifications give engineers clear parameters when developing or reviewing a precision fluid connection.

For systems using several tubing diameters, the broader SH series offers additional PEEK and SUS316 configurations. This can simplify component selection and provide a more consistent approach across different fluid-control assemblies.

Ultimately, the best connection design is not determined by the washer alone. Tubing preparation, fitting geometry, material compatibility, cleanliness, dimensional tolerances, and assembly procedures should all be considered together. For precision equipment where fluid-path stability matters, selecting a purpose-designed component can be an important step toward more repeatable connection performance.

For further information about precision fluid-control components and customized connection solutions, Aiiboom technology can be considered as a manufacturing resource for applications requiring controlled dimensions and specialized fluid-handling components.

https://www.aiiboom.com/
Aiiboom technology

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