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High Temperature Hoses (RNH / Red Nomex / CAC Hoses)

High temperature hoses are engineered for applications requiring exceptional heat resistance, strength, and durability under extreme operating conditions.

Constructed using Nomex® reinforcement and high-performance silicone materials, these hoses are designed to perform in high-temperature, high-pressure environments, making them ideal for charge air cooler (CAC) systems and heavy-duty applications.

  • Designed for extreme temperature environments
  • Nomex® reinforcement for superior strength
  • High pressure and durability performance
  • Ideal for CAC, automotive and industrial systems

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What are High Temperature Hoses?

High temperature hoses (RNH hoses) are specialist silicone hoses reinforced with Nomex® fibre, a high-performance material known for its heat resistance and mechanical strength.

These hoses are designed to operate in environments where:

  • Temperatures exceed standard silicone capabilities
  • High pressure and stress are present
  • Long-term durability is critical

They are commonly used in charge air cooler (CAC) systems, where both heat and pressure must be managed effectively.

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  • Known As

    • Nomex hoses
    • CAC hoses
    • High heat hoses
    • Reinforced silicone hoses
    • Charge air cooler hoses

  • Key Features and Benefits

    Extreme Heat Resistance – Designed to perform in high-temperature environments beyond standard silicone hose limits.

    Nomex® Reinforcement – Provides superior strength, durability, and resistance to heat-related degradation.

    High Pressure Capability – Suitable for systems operating under significant pressure, such as CAC systems.

    Long Service Life – Engineered to withstand continuous use in demanding environments, reducing maintenance needs.

    Reliable Performance – Maintains flexibility and integrity under extreme operating conditions.

  • What RNH Hoses Are Used For

    High temperature hoses are used across industries where heat and pressure performance are critical:

    • Automotive charge air cooler (CAC) systems
    • Turbocharged and high-performance engines
    • Commercial vehicles and heavy-duty fleets
    • Marine engine systems
    • Rail and industrial applications
    • High-temperature air and fluid transfer systems

  • Sizes, Lengths, Angles

    • Inner diameters (ID): From 6mm to 152mm
    • Straight: Available as standard in 1, 2, 3 and 4 metre lengths. Other lengths can be requested.
    • Elbows: 45°, 90°, 135°, 180° with leg lengths from 102mm to 250mm. Bespoke parts also available.
    • Colours: Standard colours are brick red or black. Other colours are available upon request.

Why High Temperature Hoses Are Required

In modern engines and industrial systems, increasing performance demands lead to:

  • Higher operating temperatures
  • Increased pressure within air and fluid systems
  • Greater stress on hose materials

Standard silicone hoses may not provide sufficient performance in these environments.

High temperature hoses are engineered to:

  • Withstand extreme heat and pressure cycles
  • Maintain structural integrity in demanding systems
  • Provide long-term reliability in high-performance applications

Nomex® reinforcement plays a key role in delivering:

  • Enhanced strength and durability
  • Resistance to heat degradation
  • Improved performance under continuous stress

Leyland Hose & Silicone High Temperature Capability

At Leyland Hose & Silicone, our high temperature hoses are:

  • Reinforced with Nomex® fibres for enhanced performance
  • Designed for extreme heat and pressure applications
  • Manufactured to deliver long-term durability and reliability
  • Available in standard and bespoke configurations

Our hoses are trusted in environments where performance under extreme conditions is essential.

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