1. Product Overview
The Swagelok Alloy C-276 Nut (Model: HC-812-1) is a critical component designed for use in high-performance fluid systems. Manufactured from Hastelloy C-276, this nut provides exceptional corrosion resistance in a wide range of aggressive media, making it suitable for demanding industrial applications. It is specifically engineered for 1/2" tube OD compression fittings, ensuring a secure and leak-tight connection when properly installed with compatible Swagelok components.
Image 1: Swagelok Alloy C-276 Nut. This image displays the hexagonal nut with internal threading, designed for compression tube fittings.
2. Installation and Setup
Proper installation is crucial for the performance and safety of Swagelok compression fittings. Always refer to the comprehensive Swagelok Tube Fitting Installation Manual for detailed instructions and safety guidelines. The following provides a general overview for the nut component:
- Tube Preparation: Ensure the tube end is cut square, deburred, and free of scratches or damage. The tube must be clean and free of foreign particles.
- Component Inspection: Verify that the Swagelok Alloy C-276 Nut, ferrules (front and back), and fitting body are clean, undamaged, and of the correct size and material for the application.
- Assembly:
- Insert the tube into the fitting body until it bottoms out against the shoulder.
- While holding the tube firmly in place, finger-tighten the Swagelok nut.
- Mark the nut at the 6 o'clock position.
- Initial Tightening:
- For 1/2" tube fittings, tighten the nut 1 1/4 turns past finger-tight with a wrench.
- The mark on the nut should now be at the 9 o'clock position (for 1 1/4 turns).
- Reassembly (if applicable): If a fitting is disassembled, ensure the ferrules remain on the tube in their original orientation. When reassembling, tighten the nut finger-tight, then turn it approximately 1/4 turn past finger-tight with a wrench.
Warning: Do not overtighten or undertighten. Improper tightening can lead to leaks or fitting failure. Always use appropriate tools and follow manufacturer's torque specifications.
3. Operating Principles
Once properly installed, the Swagelok Alloy C-276 Nut, in conjunction with the front and back ferrules and the fitting body, creates a robust, leak-tight mechanical seal on the tube. The Hastelloy C-276 material ensures the integrity of this seal even in highly corrosive environments and at elevated temperatures and pressures, within the specified limits of the overall fitting assembly. The nut's primary function is to apply the necessary compressive force to the ferrules, causing them to swage onto the tube and create the seal.
4. Maintenance
Regular inspection and maintenance are essential to ensure the long-term reliability of your fluid system components.
- Visual Inspection: Periodically inspect the nut and surrounding fitting for any signs of corrosion, damage, or leaks. Hastelloy C-276 is highly corrosion-resistant, but extreme conditions or incompatible media can still cause issues.
- Leak Detection: Use appropriate leak detection methods (e.g., leak detection fluid) to check for any signs of leakage around the fitting connections.
- Cleaning: If cleaning is required, use methods compatible with Hastelloy C-276. Avoid abrasive cleaners or tools that could damage the surface or sealing areas.
- Replacement: If the nut or any part of the fitting shows signs of wear, damage, or persistent leakage, it should be replaced immediately with a new, genuine Swagelok component. Do not attempt to repair damaged nuts or ferrules.
5. Troubleshooting
Most issues with compression fittings are related to improper installation or component damage.
| Problem | Possible Cause | Solution |
|---|---|---|
| Leakage at fitting connection |
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| Nut will not tighten fully |
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If troubleshooting steps do not resolve the issue, contact Swagelok technical support or a certified distributor for assistance.
6. Specifications
| Attribute | Detail |
|---|---|
| Model Number | HC-812-1 |
| Brand | Swagelok |
| Material | Alloy C-276 (Hastelloy) |
| Tube OD Compatibility | 1/2 inch |
| Fitting Type | Compression Nut |
| ASIN | B09S5TY5YK |
| Date First Available | February 9, 2022 |
7. Warranty and Support
Specific warranty details for the Swagelok Alloy C-276 Nut are typically provided with the complete fitting assembly or can be obtained directly from Swagelok or an authorized Swagelok distributor. Swagelok products are known for their high quality and reliability.
For technical support, product inquiries, or to locate an authorized distributor, please visit the official Swagelok website or contact their customer service department. Always use genuine Swagelok components for optimal performance and safety.
Swagelok Official Website: www.swagelok.com
