Product Description
Engineered for modern multi-split air conditioning and VRF/VRV systems, our premium Copper Refnet Joints (also known as Branch Pipes or Y-Joints) provide optimal refrigerant distribution across complex HVAC piping networks. Manufactured from high-purity TP2 copper (C12200), these Y-joints, U-shaped joints, and 90° branch fittings feature precise wall thickness and smooth inner surfaces to minimize flow resistance, pressure drops, and system operational noise.
Each refnet joint undergoes rigorous high-pressure testing to guarantee leak-free performance under extreme working conditions (operating pressure up to 4.15 MPa / burst pressure over 12.5 MPa). Designed for seamless integration with major OEM brands, our branch pipes come fully compatible with pre-formed insulation kits to prevent condensation and improve energy efficiency.
Key Technical Specifications
- Material Grade: TP2 Deoxidized Copper (C12200, 99.9% Cu min)
- Applications: VRF/VRV Air Conditioning Systems, Multi-Split HVAC, Heat Pumps
- Configurations: Standard Y-Joints, U-Shaped Joints, 90° Branch Pipes, Insulated Kits
- Max Working Pressure: 4.15 MPa (41.5 Bar / 600 PSI) for R410A / R32 refrigerants
- Connection Type: Sweat / Brazed Solder Joint with multi-diameter step sizing
- Insulation Material: Flame-retardant XPE / IXPE pre-molded shells
Frequently Asked Questions (FAQ)
Q1: What is a Copper Refnet Joint (Branch Pipe) and why is it essential in VRF systems?
A Refnet Joint (or Branch Pipe) is a specialized copper fitting designed to split refrigerant flow evenly into two or more lines within a Variable Refrigerant Flow (VRF/VRV) system. Unlike standard tees, refnet joints feature smooth interior contours that maintain stable pressure balance and fluid velocity throughout the piping layout.
Q2: Are these refnet joints compatible with major VRF equipment manufacturers?
Yes. We manufacture refnet branch pipes matched to the exact dimensional and technical specifications of all leading global HVAC brands, including Daikin, Midea, Gree, Mitsubishi, VRV/VRF OEM units, and custom HVAC projects.
Q3: What working pressures can these copper branch pipes handle?
Our refnet joints are specifically engineered for high-pressure eco-friendly refrigerants like R410A and R32. They feature a design pressure rating up to 4.15 MPa (41.5 Bar) and undergo factory pressure testing up to 6.5 MPa to ensure structural safety.
Q4: Do you offer pre-insulated kits with the copper Y-joints?
Yes. We supply custom-fit, flame-retardant XPE/IXPE foam insulation jackets designed specifically for each branch pipe shape. These jackets prevent surface condensation, reduce thermal loss, and accelerate job-site installation.
Q5: Can you provide customized sizes or specialized branch pipe designs?
Absolutely. Beyond standard multi-step reducer sizes, we offer OEM and ODM customization based on technical CAD drawings or sample specifications for custom refrigeration manifolds and HVAC header assemblies.