Air Conditioning Hose Lines – Advanced HVAC Hose Production Systems

Colmec’s extrusion lines for Air Conditioning (A/C) Hose Lines are specifically designed to produce multi-layer barrier hoses that meet the demanding performance and environmental requirements of modern refrigerant systems. These hoses are used in vehicle climate control and stationary HVAC systems.

Extrusion Line Types & Hose Structures

1. Verner-Type Hose Extrusion Line

  • Designed for low refrigerant permeation and high thermal resistance
  • Multi-layer construction:
    • Inner layer: Polyamide (PA) to act as a gas barrier minimizing refrigerant loss (e.g., R134a, R1234yf)
    • Intermediate layer: Rubber coating (typically EPDM or CR)
    • Textile reinforcement: Knitted or braided synthetic fiber (e.g., polyester, aramid)
    • Outer layer: Rubber coating for environmental and mechanical protection
  • Suitable for automotive A/C hoses and high-efficiency HVAC applications

2. Barrier Tube Extrusion Line

  • Alternate multilayer configuration optimized for pressure and flexibility
  • Multi-layer construction:
    • Inner layer: Rubber (for flexibility and chemical compatibility)
    • Second layer: Co-extruded Polyamide (PA) for low refrigerant permeability
    • Third layer: Rubber adhesion layer
    • Reinforcement: Textile braiding or knitting for strength
    • Outer rubber coating: Protects against UV, ozone, abrasion, and chemicals
  • Designed for air conditioning systems in:
    • Cars and trucks
    • Buses and coaches
    • Commercial and industrial HVAC systems

Technical Specifications

  • Textile Reinforcement:
    • High strength knitted or braided reinforcement
    • Materials: Polyester, nylon, or aramid for burst pressure resistance and flexibility
  • Internal Diameter Range:
    • From 5/16″ (approx. 7.9 mm) up to 1 1/4″ (approx. 31.8 mm)
    • Covers light vehicles to heavy-duty industrial HVAC systems
  • Operating Pressure:
    • Up to 35 bar (approx. 500 psi)
    • Suitable for most modern refrigerant systems (R134a, R1234yf, R744/CO₂ systems with design variation)
  • Low Permeation:
    • Inner polyamide barrier significantly reduces refrigerant gas loss
    • Helps comply with environmental regulations (EU, EPA, etc.)

Key Applications

  • Automotive & Transportation:
    • Climate control systems for:
      • Passenger vehicles (cars, SUVs)
      • Commercial vehicles (trucks, buses)
      • Electric and hybrid vehicle thermal management
  • Industrial Products:
    • A/C hoses for:
      • Refrigeration equipment
      • Factory or plant climate control systems
      • Agricultural and construction machinery cabins
  • Aerospace:
    • Cabin environmental systems and specialized air management lines
    • Lightweight hoses with reinforced barrier properties for aircraft use

 

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