Silicone Hose Liners

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At Viper Performance all of our Silicone hoses feature a 1mm dedicated inner liner.

A liner is the internal visible layer that is in direct contact with the passing air or fluid that is transferred inside the hose.

In our standard silicone hose the liner is carbon black or brick red in the case of a Nomex reinforced hose for better heat stability which is perfect for a Nomex reinforced hose.
The standard Viper Performance silicone liner will already offer excellent performance and resistance against many chemicals and fluids, and protect the hose inside.

However, for certain applications we recommend alternative specialist Liners.
Standard liners are not suitable for oil / fuel.

Viper Performance can build your bespoke hoses liners resistant to oil/fuel or OAT.

We can also make our universal hoses to order with such liners (subject to minimum orders due to the processing of raw materials and current lead times)

We offer several upgrade liner options.

You must consider the correct liner for the application.

Fluorosilicone Liner

FluoroSilicone Liner

A fluorosilicone liner in hoses is a specialized inner layer that offers several advantages over standard silicone or other types of hose linings.


Chemical Resistance
:

  • Fluorosilicone is highly resistant to a wide range of chemicals, including fuels, oils, solvents, and hydraulic fluids.
  • It offers better chemical resistance compared to standard silicone, making it suitable for more demanding environments.

Temperature Resistance:

  • Fluorosilicone can withstand a wide temperature range, typically from -50°C to +220°C (with a Nomex reinforcement).
  • It retains its flexibility and performance characteristics at both high and low temperatures.

Durability:

  • The material is highly durable, offering excellent resistance to wear, aging, and environmental factors.
  • It maintains its integrity under prolonged exposure to harsh conditions.

Flexibility:

  • Fluorosilicone remains flexible over a wide temperature range, which is crucial for applications requiring bending and movement.

    Benefits of Fluorosilicone Liners

    Enhanced Chemical Compatibility:

    • Suitable for transporting aggressive chemicals without degradation.
    • Ideal for applications involving fuel, oil, and other automotive fluids.

    Improved Longevity:

    • Extends the life of the hose by preventing damage from chemical exposure and thermal cycling.
    • Reduces the need for frequent replacements and maintenance.

    High-Performance Applications:

    • Used in high-performance environments where standard silicone hoses would fail.
    • Suitable for both static and dynamic applications due to its robust properties.

    Applications of Fluorosilicone-Lined Hoses

    Automotive:

    • Used in fuel lines, oil lines, turbocharger systems, and coolant systems.
    • Essential in high-performance and racing applications where exposure to aggressive fluids is common.

      Industrial:

      • Applied in chemical processing, pharmaceutical manufacturing, and other industries requiring the transfer of aggressive chemicals.
      • Suitable for environments with wide temperature variations.

      Marine:

      • Used in marine engines and fuel systems where exposure to harsh marine environments and fuels is frequent.

      Construction of Fluorosilicone-Lined Hoses

      • Multi-Layered Design: We will build your hoses with a 1mm inner liner layer of high grade fluorosilicone  (Dark grey in colour and with a slight sticky feel to the touch), followed by reinforcing layers (such as polyester, aramid / Nomex , or fiberglass), and an outer layer of standard silicone.
      • Seamless Integration: The liner is seamlessly integrated to ensure a smooth internal surface, preventing flow disruptions and minimising the risk of delamination.

      Summary

      Fluorosilicone-lined hoses are a superior choice for applications requiring enhanced chemical resistance, temperature stability, and durability. Their ability to withstand aggressive chemicals and extreme temperatures makes them invaluable in automotive, aerospace, industrial, and marine sectors.

      Fluoro Carbon Liner (FKM / Viton)

      Fluro Carbon Liner (FKM / Viton)

      An FKM (fluoroelastomer) liner in hoses provides a specialised inner layer that significantly enhances the hose’s performance and durability, particularly in demanding environments. Here’s an in-depth look at the properties, benefits, and applications of FKM liners in hoses:

      Chemical Resistance:

      • FKM, also known as Viton, is renowned for its exceptional resistance to a broad spectrum of chemicals, including fuels, oils, lubricants, and many acids.
      • It offers superior chemical resistance compared to standard rubber and many other elastomers.

      Temperature Resistance:

      • FKM can endure extreme temperatures, typically ranging from -20°C to +200°C (with Nomex / Aramid reinforcement).
      • It retains its mechanical properties and flexibility across this temperature range.

      Durability:

      • The material is extremely durable, showing excellent resistance to wear, abrasion, and environmental factors such as ozone, UV light, and weathering.
      • It exhibits low permeability to gases and fluids, enhancing the hose’s longevity.

      Mechanical Strength:

      • FKM maintains high tensile strength and elasticity, ensuring the hose remains robust under pressure and mechanical stress.

      Benefits of FKM Liners

      Enhanced Chemical Compatibility:

      • Ideal for transporting aggressive chemicals and hydrocarbons without degradation.
      • Essential for applications involving constant exposure to harsh substances.

      Extended Service Life:

      • Increases the operational lifespan of hoses by preventing internal degradation and damage.
      • Reduces maintenance costs and the frequency of hose replacements.

      High-Performance Reliability:

      • Suitable for use in extreme conditions where other materials might fail.
      • Provides consistent performance in both static and dynamic applications.

      Applications of FKM-Lined Hoses

      Automotive:

      • Used in fuel lines, oil cooler lines, and emissions control systems.
        It is commonly associated with Electric Vehicles, or Hydrogen fuel cells cooling systems.
      • Common in high-performance and racing applications due to its resistance to fuels and lubricants.

        Industrial:

        • Utilised in chemical processing, petrochemical industries, and pharmaceutical manufacturing.
        • Ideal for applications involving the transfer of aggressive chemicals and solvents.

        Oil and Gas:

        • Suitable for handling crude oil, natural gas, and other hydrocarbons.

        Marine:

        • Applied in marine fuel systems and hydraulic lines exposed to harsh marine environments.
        • Provides resistance to saltwater and marine fuels.

        Construction of FKM-Lined Hoses

        • Multi-Layered Design: We will build your hoses with a 1mm inner liner layer of high grade FKM layer (Dark grey in colour and with a slight sticky feel to the touch), followed by reinforcing layers (such as polyester, aramid / Nomex , or fiberglass), and an outer layer of standard silicone.
        • Seamless Integration: The FKM liner is seamlessly integrated to ensure a smooth internal surface, enhancing fluid flow and reducing the risk of internal damage.

        Summary

        FKM-lined hoses are the optimal choice for applications demanding superior chemical resistance, high-temperature tolerance, and exceptional durability. Their ability to withstand aggressive chemicals and extreme environmental conditions makes them indispensable in automotive, aerospace, industrial, oil and gas, and marine sectors.

        O.A.T Liner (Organic Acid Technology)

        O.A.T Liner (Organic Acid Technology)

        O.A.T (Organic Acid Technology) liners in silicone hoses are specialised inner layers designed to enhance the performance and longevity of hoses, particularly in automotive and industrial cooling systems. Here’s a detailed look at the properties, benefits, and applications of O.A.T liners in silicone hoses:

        Chemical Resistance:

        • O.A.T liners provide excellent resistance to organic acids used in modern coolant formulations.
        • They are designed to withstand degradation from long-life, low-toxicity coolants that contain organic acids.

        Temperature Resistance:

        • These liners can handle a wide range of temperatures, typically from -40°C to +150°C (-40°F to +302°F).
        • They maintain their integrity and performance characteristics in both extreme cold and high heat.

        Durability:

        • O.A.T liners are highly durable, offering excellent resistance to wear, aging, and chemical attack.
        • They are designed to provide a long service life in demanding applications.

        Compatibility:

        • Compatible with various antifreeze/coolant formulations, including those that are silicate-free, phosphate-free, and amine-free.

        Benefits of O.A.T Liners

        Extended Coolant Compatibility:

        • Specifically designed to work with modern O.A.T coolants, ensuring compatibility and preventing chemical reactions that could degrade the hose.
        • Reduces the risk of coolant contamination and ensures optimal engine performance.

        Improved Longevity:

        • Enhances the hose’s lifespan by preventing internal degradation and corrosion caused by prolonged exposure to O.A.T coolants.
        • Reduces the need for frequent hose replacements and maintenance.

        Optimal Performance:

        • Ensures reliable performance in cooling systems, maintaining proper coolant flow and preventing leaks.
        • Ideal for high-performance and long-duration applications.

        Applications of O.A.T-Lined Silicone Hoses

        Automotive:

        • Used in cooling systems for passenger cars, trucks, and high-performance vehicles.
        • Essential for radiator hoses, heater hoses, and bypass hoses where O.A.T coolants are used.

        Heavy-Duty and Commercial Vehicles:

        • Applied in cooling systems of buses, trucks, and other heavy-duty vehicles.
        • Suitable for long-haul and heavy-use scenarios where extended coolant life is critical.

        Industrial:

        • Utilised in industrial cooling systems, including those in manufacturing plants and power generation facilities.
        • Ideal for systems that use O.A.T-based coolants to prevent scaling and corrosion.

        Agricultural and Off-Road Equipment:

        • Used in the cooling systems of tractors, harvesters, and other agricultural machinery.
        • Suitable for off-road vehicles and equipment that operate in harsh environments.

        Construction of O.A.T-Lined Silicone Hoses

        • Multi-Layered Design: We build all of our OAT lined hoses with a 1mm O.A.T liner, typically in green colour for identification purposes and due to the material characteristics.  Followed by multiple reinforcing layers (such as polyester or aramid / Nomex fabric) and an outer silicone layer.
        • Seamless Integration: The O.A.T liner is seamlessly integrated to ensure a smooth internal surface, facilitating efficient coolant flow and reducing the risk of internal wear.

        Summary

        O.A.T-lined silicone hoses are essential for applications requiring compatibility with modern organic acid technology coolants. Their ability to withstand chemical degradation, extreme temperatures, and prolonged exposure to O.A.T coolants makes them indispensable in automotive, heavy-duty, industrial, and agricultural cooling systems. These hoses ensure reliable performance, extended service life, and optimal protection against coolant-related wear and tear.

        Optional Wire Reinforcements

        Optional Wire Reinforcements

        • Spiral Steel Wire: Used in very high-pressure hoses, offering robust reinforcement in addition the multiple layers of reinforced fabric.
          Viper performance does have the ability to make and supply multi-bend shaped silicone hoses of small to large diameter with a wire reinforcement .  This is made to order and adds typically around 40% extra cost to the finished hose due to the build process.
          The wire is often applied by hand between plies and is a labour  intensive process.

        • Nylon Wire: Offers excellent flexibility, high tensile strength, and resistance to abrasion and chemicals.
          Nylon is used where electrical conductivity is important.
          Nylon reinforcement can be specified in lieu of steel in our SuperFlex straight hoses.

        In summary, the choice of reinforcement fabric or material in a hose depends on the specific requirements of the application, including pressure, flexibility, temperature resistance, and environmental factors.

        Optional Anti Abrasion sleeve

        Optional Anti Abrasion sleeve

        We can also at point of manufacturing your bespoke silicone hoses apply an external anti-abrasion sleeve on most shape and diameter hoses. This is a protective cover designed to shield the hose from wear and tear caused by friction and abrasion. The sleeves we use are made from nylon, which is a though ward wearing material.

        Our sleeves are heat shrunk onto the exterior of the hose where needed.

        The additional sleeve will withstand harsh conditions and prevent the hose from being damaged when it comes into contact with rough surfaces, sharp edges, gravel, sand, stone chips, or other abrasive elements.

        Here are some key points about anti-abrasion sleeves:

        1. Protection: The primary purpose of the sleeve is to protect the hose from external damage, extending its lifespan and maintaining its integrity.
        2. Application: These sleeves are used in various industries, including construction, manufacturing, agriculture, and automotive, where hoses are exposed to harsh environments.
        3. Installation: They can be installed over the hose, either as a pre-assembled feature or as an add-on that can be retrofitted.
        4. Safety: By preventing damage to the hose, anti-abrasion sleeves also help to prevent leaks, bursts, and other failures that could lead to safety hazards.
        5. Appearance: Some sleeves may also have additional features like colour coding for easy identification or reflective strips for visibility in low-light conditions.

        Overall, anti-abrasion sleeves are a crucial component for maintaining the durability and safety of hoses used in demanding applications.

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