Description
🟢 Green Surface Double Wound Helix Coils: Technical Data
1. Core High-Efficiency Design
| Specification | Detail |
| Design Type | Coaxial Tube-in-Tube (Shell-and-Coil) |
| Geometry | Double Wound Helix (A compact, coiled structure optimizing space). |
| Technology Focus | High Efficiency Green Surface: This is an enhanced surface treatment applied to the patented convoluted inner tube, engineered to yield a significantly higher heat transfer coefficient U compared to the Classic models. |
| Function | Operates efficiently as both a Refrigerant Condenser and a Refrigerant Evaporator. |
| Flow Arrangement | Counterflow (Maximizes mean temperature difference for peak efficiency). |
| Anti-Fouling | The intense turbulence created by the convolutions, combined with the Green Surface texture, provides superior anti-fouling characteristics, maintaining high performance over the coil’s lifespan. |
2. Materials and Working Pressure Ratings
The coils are built to be robust and compatible with modern refrigerants:
| Parameter | Material/Value | Notes |
| Outer Shell Material | Carbon Steel | Provides structural integrity. |
| Inner Tube Material Options | Copper COAX-7000: Standard for fresh water/cooling tower. 90/10 Cupronickel COCX-7000: For corrosive environments (ground source, marine). | |
| Max. Refrigerant Working Pressure | 650 psig | Suitable for R-410A and all common HFC/HFO refrigerants. |
| Max. Water Working Pressure | 500 psig | High rating for demanding hydronic systems. |
| Certifications | C-UL-US Listed | Certified by UL and CSA. Manufactured in an ISO 9001:2015 certified plant. |
Double Wound Helix: Design and Safety
The double wound helix refers to the construction of the inner tube that facilitates both high efficiency and crucial safety.
- Design: It consists of two layers of convoluted (corrugated) tubing—an inner primary tube and an outer secondary tube—wound helically and stacked one over the other. This creates a secure, double-layer barrier between the two fluid circuits.
- Safety Priority (Potable Water): This is the most critical feature. The double-wall construction ensures that if a leak were to occur in either the inner or outer barrier, the refrigerant (or other fluid) cannot mix with the potable water flowing inside the inner tube. This design is mandatory for codes requiring separation of refrigerant from drinking water.
- Leak Path to Atmosphere: Specific models often include a small leak detection void between the inner and outer walls. If a leak occurs, the refrigerant or water will escape through a detection port to the atmosphere, alerting maintenance personnel without contaminating the potable water supply.
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