Condenser tubes are specifically designed for small commercial refrigeration condensers used in supermarket freezers, display cabinets, ice machines, ice cream machines, and similar equipment. These applications require compact tube geometry, reliable pressure resistance, and excellent formability to create complex shapes.

Shell supplies high-precision small-diameter copper tubes with thin walls and tight tolerances. In addition to supplying raw tubes, we also offer custom semi-finished processing services, including tube bending, drilling, punching, forging, flaring, and welding—enabling our customers to streamline production lines and improve efficiency. Our tubes are compatible with R134a, R404A, R290, CO2, and other commercial refrigerants.

Heat exchange tubes for condensing units

Core Advantages

Small Diameter, High Precision

Outer diameter from Φ4 to Φ12mm with precise wall thickness control, ideal for compact condenser designs with limited space.

Semi-Finished Processing Services

Custom bending, drilling, reducing, expanding, and welding services according to your drawings—delivered as semi-finished parts ready for assembly.

Compatible with New Refrigerants

High-pressure rated tubes available for CO2 transcritical cycles, as well as optimized tubes for R290, R404A, and R134a systems.

High Internal Cleanliness

Strict internal residue control prevents clogging of capillary tubes and expansion valves, ensuring long-term system reliability.

Technical Parameters

Outer Diameter (mm)	Base Wall (mm)	Tooth Height (mm)	Number of Teeth	Helix Angle (°)	Weight (g/m)	Heat Transfer Area (m²/m)	Material
7.00	0.25-0.32	0.12-0.18	45-55	15-25	42-50	0.021-0.024	TP2, T2
9.52	0.30-0.40	0.14-0.20	50-65	18-28	52-62	0.025-0.028	TP2, T2
7.94	0.27–0.35	0.12–0.18	45-60	18>28	63–75	0.028–0.032	TP2, T2

Typical Applications

Supermarket Freezer Condenser

Condensers for open and closed display freezers, refrigerated shelving, and walk-in coolers in retail environments.

Commercial Display and Beverage Cooler

Condenser coils for glass door merchandisers, beverage coolers, and vending machines in commercial settings.

Ice Machine and Ice Cream System

Condensers for commercial ice machines, ice cream makers, and frozen beverage dispensers.

Medical Cold Chain Refrigeration

Condensers for medical-grade refrigerators, vaccine storage units, and pharmaceutical cold chain equipment.

Frequently Asked Questions

Q: Which material is suitable for CO2 refrigerant systems?

CO2 (R744) transcritical systems operate at extremely high pressures (up to 130 bar). For these applications, we recommend our thick-wall TP2 copper tubes with enhanced wall thickness. Alternatively, the highest pressure levels may require stainless steel tubes. Kairan Energy can provide both copper and customized tube solutions for CO2 systems. Please consult our engineering team for detailed material and wall thickness recommendations based on your specific operating conditions.

Q: Can you provide complete bent tube assemblies and welding?

Yes, we offer comprehensive semi-finished processing, including CNC tube bending, end forming (reducing, expanding, flaring), drilling, punching, and brazed joint welding. We can provide complete tube assemblies according to your engineering drawings, ready for direct installation into your condensing unit. This service helps reduce your in-house manufacturing costs and quality control burden. Please share your drawings with our team for feasibility review and quotation.

Q: Do you accept small batch custom orders?

Yes, we welcome small batch orders with custom specifications. For standard tube sizes, our minimum order quantity is as low as 100 kg. For custom semi-finished parts processed by bending, welding, or other operations, the MOQ depends on the complexity of the processing and setup requirements. Sample quantities (under 10 pieces) are available for certification purposes. Please contact our sales team with your requirements for a specific MOQ quotation.

Heat exchange tubes for condensing units