FESTO RS-4-18 Quick-Release Coupling | 4mm Port, 18mm Tube OD, Push-to-Connect Specs

FESTO RS-4-18 Quick-Release Coupling | 4mm Port, 18mm Tube OD, Push-to-Connect Specs

FESTO RS-4-18 quick-release coupling specifications. 4mm pneumatic port, 18mm tube outer diameter, push-to-connect design, IP40 protection. For industrial compressed air and vacuum applications.

Product Overview

The FESTO RS-4-18​ is a quick-release coupling​ from the RS series, designed for rapid connection and disconnection of pneumatic tubing in industrial applications. This model features a 4mm nominal port size​ and is designed for 18mm outer diameter tubing. The "RS" designation indicates the quick-release series, "4" specifies the port size, and "18" denotes the compatible tube outer diameter. This push-to-connect coupling enables fast, tool-free installation and removal of pneumatic tubing, making it ideal for applications requiring frequent line changes or maintenance.

Technical Specifications

Note: Specifications are based on FESTO RS series technical documentation. The "RS-4-18" model specifically indicates 4mm port size and 18mm tube outer diameter compatibility. Actual specifications may vary slightly depending on production batch.

Model Number Decoding (RS-4-18)

• RS:​ Series designation (RS quick-release coupling series)

• 4:​ Nominal port size (4mm)

• 18:​ Compatible tube outer diameter (18mm)

Note:​ The "4" designation refers to the nominal port size category, which corresponds to the internal flow path diameter. The "18" indicates the specific tube outer diameter that the coupling is designed to accept.

Key Features

• Quick-Release Design:​ Push-button mechanism for fast, tool-free tube connection and disconnection

• 4mm Port Size:​ Standard industrial pneumatic port for moderate flow applications

• 18mm Tube Compatibility:​ Designed for 18mm outer diameter pneumatic tubing

• Push-to-Connect Operation:​ Simple insertion without tools; press release button to remove

• Leak-Free Seal:​ Integrated sealing system ensures reliable connection under pressure

• IP40 Protection:​ Basic dust protection for industrial environments

• Lightweight Construction:​ PBT housing for reduced weight and corrosion resistance

• Wide Pressure Range:​ Suitable for both compressed air and vacuum applications

• Standard Industrial Use:​ Compatible with common pneumatic systems

Typical Applications

• Industrial Automation:​ Pneumatic tool connections, machine air supply lines

• Maintenance Systems:​ Quick-disconnect points for service and repair

• Test and Measurement:​ Temporary pneumatic connections for testing equipment

• Packaging Machinery:​ Air line connections requiring frequent changes

• Assembly Systems:​ Component handling and positioning equipment

• Material Handling:​ Conveyor and transfer system pneumatic connections

• Laboratory Equipment:​ Quick-connect pneumatic interfaces

Important Technical Notes

1. Tube Compatibility:​ Ensure tubing outer diameter is exactly 18mm for proper sealing and retention. Do not use with undersized or oversized tubing.

2. Pressure Limits:​ Do not exceed 10 bar maximum operating pressure. The coupling is rated for vacuum applications down to -0.95 bar.

3. Installation:​ Insert tubing fully until it bottoms out in the coupling. Pull on tubing to verify proper engagement before pressurizing.

4. Temperature Limits:​ Operating temperature range is -10°C to +60°C. Do not use outside this range.

5. Media Compatibility:​ Designed for compressed air. Verify compatibility with other gases or fluids before use.

6. Release Operation:​ Press the release button fully before attempting to remove tubing. Do not force removal without pressing the release mechanism.

7. Inspection:​ Periodically check for leaks, damage, or wear. Replace if seals are damaged or if the release mechanism becomes stiff.

8. Multiple Connections:​ Avoid excessive side loads or bending forces on connected tubing to prevent premature wear.

Note: For complete installation guidelines, dimensional drawings, and detailed technical data, consult the official FESTO RS Series Technical Manual. Always verify the exact model number configuration with the manufacturer, as notation variations may occur.