1. Introduction
This manual provides essential instructions for the safe and effective installation, operation, and maintenance of the Swagelok M-12M0-6 Union. This compression fitting is designed for connecting two sections of 12mm outside diameter (OD) tubing in various industrial applications. Constructed from Monel/Alloy 400/R-405, it offers excellent corrosion resistance and strength, making it suitable for demanding environments.
Please read this manual thoroughly before attempting any installation or operation to ensure proper usage and to prevent potential hazards or damage to the fitting and associated systems.
2. Safety Information
Always adhere to standard safety practices when working with industrial fittings and pressurized systems. Failure to follow these guidelines may result in serious injury or equipment damage.
- Ensure the system is depressurized and drained before installation or maintenance.
- Wear appropriate personal protective equipment (PPE), including safety glasses and gloves.
- Use only genuine Swagelok components and tools for installation.
- Do not overtighten or undertighten fittings; follow recommended torque specifications.
- Verify compatibility of materials with the fluid or gas being conveyed.
- Inspect all components for damage before assembly.
3. Product Overview
The Swagelok M-12M0-6 Union is a straight compression fitting designed to connect two 12mm OD tubes. It consists of a body, two nuts, two front ferrules, and two back ferrules. The Monel/Alloy 400/R-405 construction provides high resistance to corrosion in various aggressive media.
Figure 1: Swagelok M-12M0-6 Union. This image displays the complete union fitting, showing the central body, two compression nuts, and the internal ferrules (though not clearly visible, they are implied by the design). The fitting is made of a metallic alloy, appearing silver-grey, and has hexagonal sections for wrench application.
4. Specifications
Key technical specifications for the Swagelok M-12M0-6 Union:
| Specification | Value |
|---|---|
| Model Number | M-12M0-6 |
| Connector Type | Union, OD Compression |
| Tube OD Size | 12mm |
| Material | Monel / Alloy 400 / R-405 |
| Exterior Finish | Metric |
| Thread Type | NPT (Note: This refers to the internal thread type if applicable, typically for pipe connections, but for compression fittings, it refers to the nut threads or body threads if there's a pipe end. For a union, it's primarily compression.) |
| Item Weight | 1 Pound |
| Manufacturer | Swagelok |
5. Setup and Installation
Proper installation is critical for leak-free performance. Follow these steps carefully:
- Prepare the Tubing:
- Cut the tubing squarely, removing any burrs from the inside and outside edges.
- Ensure the tubing is clean and free of scratches or damage on the outside diameter.
- Assemble the Fitting:
- Insert the tube into the Swagelok fitting until it bottoms out against the shoulder of the fitting body.
- While holding the tube firmly in place, finger-tighten the nut.
- Mark the Nut:
Using a marker, draw a line on the nut from one of its flats to the fitting body. This mark will serve as a reference for tightening.
- Tighten the Nut:
Using a wrench, tighten the nut 1-1/4 turns past finger-tight for 12mm Monel tubing. For other materials or sizes, consult the official Swagelok Tube Fitting Installation Manual for specific turn requirements. The mark on the nut should align with the body after tightening.
- Inspect the Connection:
Visually inspect the connection to ensure the nut is properly tightened and the tube is securely seated. Perform a leak test according to system procedures before full operation.
Note: For critical applications or if unsure, always refer to the latest official Swagelok installation guidelines and training resources.
6. Operating Principles
Once properly installed, the Swagelok M-12M0-6 Union creates a secure, leak-tight connection between two tubes. The two-ferrule design ensures a strong mechanical grip and a reliable seal. The front ferrule creates a seal on the tube and the fitting body, while the back ferrule provides a strong grip on the tube, preventing tube pull-out.
The fitting is designed to operate within the pressure and temperature ratings specified for the tubing material and the fitting material (Monel/Alloy 400/R-405). Exceeding these ratings can compromise the integrity of the connection and lead to system failure.
7. Maintenance
Regular inspection and maintenance are essential to ensure the long-term reliability of your Swagelok connections.
- Visual Inspection: Periodically inspect all connections for signs of leakage, corrosion, or physical damage. Look for discoloration, residue, or deformation around the fitting.
- Leak Detection: Use an approved leak detection fluid or electronic leak detector to check for leaks, especially after system startup or pressure changes.
- Re-tightening: Swagelok fittings generally do not require re-tightening after initial proper installation. If a leak is detected, do not simply re-tighten. Depressurize the system, disassemble the fitting, inspect components for damage, replace any damaged parts (especially ferrules), and reassemble according to installation instructions.
- Cleaning: Keep the exterior of the fittings clean to prevent accumulation of corrosive substances.
8. Troubleshooting
Most issues with Swagelok fittings are related to improper installation. Here are common problems and their solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Leakage at connection |
|
|
| Tube pull-out |
|
|
| Difficulty tightening |
|
|
If troubleshooting steps do not resolve the issue, contact Swagelok technical support or your authorized distributor.
9. Warranty Information
Swagelok products are backed by a limited lifetime warranty. This warranty covers defects in material and workmanship for the life of the product. It does not cover damage resulting from improper installation, misuse, abuse, or normal wear and tear. For full details on the Swagelok warranty policy, please refer to the official Swagelok website or contact your local authorized Swagelok sales and service center.
10. Support
For technical assistance, product inquiries, or to locate an authorized distributor, please visit the official Swagelok website or contact their customer service department. Ensure you have the model number (M-12M0-6) and any relevant system details available when seeking support.
Official Swagelok Website: www.swagelok.com
