How to choose the Type C Air Conditioning Hose suitable for my HVAC system?

In the HVAC system, the air conditioning hose is a key component connecting the refrigerant cycle, which directly affects the system's sealing, energy efficiency and long-term stability. Type C air conditioning hose has become the first choice for many industrial and commercial scenarios due to its special design and wide applicability.
1. Technical characteristics and applicable scenarios of Type C hose
Type C hose is specially designed for refrigerant R134a (SAE J2064C standard), with an operating temperature range of -40℃ to +100℃, and can adapt to extreme climate conditions. Its multi-layer structure (such as different specifications with inner diameters of 8mm to 16.1mm) ensures anti-burst capability under high pressure (burst pressure of 18-23MPa), while reducing stress damage during installation through optimized bending radius (55mm to 105mm). For example, in the cooling water system of large commercial buildings, a hose with a specification of 15.2mm can take into account both flow requirements and space limitations.
2. Key considerations for matching HVAC systems
System type and heat source characteristics
According to international energy-saving regulations, if the system uses water-cooled or evaporative cooling condensers, hose materials with stronger corrosion resistance should be preferred; while air-cooled systems need to pay attention to the hose's anti-oxidation performance at high temperatures. In addition, the heat source fluctuations of hybrid energy systems may cause additional pressure on hoses, and the durability of hoses needs to be evaluated in combination with the working conditions of heat pumps or resistance heating.
Building requirements and energy efficiency goals
The functional divisions of buildings (such as commercial kitchens and data centers) have significantly different ventilation and pressure requirements for hoses. For example, kitchen exhaust systems require hoses with higher oil resistance, while precision laboratories need to avoid the release of volatile organic compounds (VOCs) from hose materials. At the same time, the thermal insulation performance of hoses directly affects the energy efficiency of the system, especially in scenarios where low ΔT syndrome occurs frequently, and models with matching wall thickness and thermal conductivity need to be selected.
Feasibility of installation and maintenance
The weight (146g/m to 470g/m) and bending radius of Type C hoses need to be coordinated with the duct layout to avoid excessive bending due to space limitations. For example, in multi-story buildings, lightweight designs (such as 8*15.2mm specifications) can reduce hoisting costs, while models with larger inner diameters need to be selected in high-flow scenarios to reduce pressure drop.
3. Practical strategies for optimizing selection
Material compatibility testing: In systems containing corrosive refrigerants or lubricants, the chemical stability of the inner layer of the hose (such as NBR rubber) needs to be verified.
Full life cycle cost analysis: including initial procurement, maintenance frequency (such as seal replacement cycle) and energy loss caused by leakage.
Supplier technical support: Choose suppliers that provide complete technical documentation (such as QC/T664-2000 certification) and customized services to ensure seamless integration of hoses with other system components.