Custom Elbow Silicone Hose

Small to Medium Sizes: 8mm (5/16″), 11mm (7/16″), 16mm (5/8″), 38mm (1.5″), 45mm (1.75″), 51mm (2″), 57mm (2.25″), 60mm (2.375″), 63mm (2.5″), 70mm (2.75″).

Large Sizes: 76mm (3″), 80mm (3.175″), 89mm (3.5″), 102mm (4″), 114mm (4.5″), and up to 127mm (5″).

Customization: You can customise silicone elbow hoses to any specific internal diameter.

Measure the Inner Diameter

Use a caliper to measure the outer diameter of the hose, then select a silicone elbow hose with an inner diameter that matches the pipe’s outer diameter.

Determine the Angle

Place a protractor against the bend to determine the exact angle.

Measure the Length

Use a tape measure to measure the route the hose will follow; you will need to account for bends and curves and allow a little extra length for adjustments during installation.

Choose the Right Clamps

Choose lined worm drive clamps, T-bolt clamps, or spring clamps to secure hoses and avoid cuts.

Yes, RONTEIX silicone elbow hoses are manufactured with a margin to account for measurement errors. Furthermore, as silicone is elastic and flexible, they can be cut using a rotary cutter, a hand knife, or a fully automatic silicone hose cutter. When cutting hoses with a reinforcement layer, please ensure you use a sharp, fine-toothed saw.

RONTEIX offers a range of colours, including red, blue, black, orange, green, yellow, purple, white and others, for you to choose from.

Function: Silicone elbow hoses are mainly used for redirecting fluid or air. Reducer hoses are used to seamlessly connect two pipes or components of different sizes.

Fluid Dynamics: Pressure loss in silicone elbow hoses depends on the bend radius and the smoothness of the inner wall. Reducer hoses feature a smooth conical transition section; the gradual change in cross-sectional area helps to reduce turbulence, pressure loss, and fluid separation.

Manufacturing and Installation Challenges: During the manufacture of silicone elbow hoses, ensure precise mandrel bending and mould forming to maintain uniform wall thickness. Ensure that the bending angles are perfectly aligned during assembly. When fitting reducer hoses, ensure that the hoses are inserted to the correct depth at both the larger and smaller ends.

An excessively small bend radius may adversely affect the performance and service life of silicone elbow hoses.

The smaller the bend radius, the greater the excessive compression on the inner wall and the excessive stretching on the outer wall of the silicone elbow hoses. This can lead to localised failure of the inner wall reinforcement layer, premature delamination and, ultimately, a burst hose.

Sharp bends with a small radius force fluids or air to change direction abruptly, thereby generating severe turbulence.

A larger, gentler bend allows the fluid to flow smoothly, minimising energy loss as much as possible.

RONTEIX reinforced silicone elbow hoses offer improved resistance to collapse under negative pressure and greater scratch resistance. If vacuum suction or negative pressure is involved, you will need to choose steel wire reinforcements to prevent collapse.

RONTEIX silicone elbow hoses, used as BOV pipes, can withstand high positive pressure and are heat- /vibration-resistant. They enable the blow-off valve to connect smoothly and release excess pressure generated when the throttle is closed, thereby protecting the turbocharger and maintaining the vehicle’s power.

Excessive Internal Pressure

The actual working pressure may exceed the hose’s rated limit, causing the hose to be forced off.

Thermal Expansion

Failure to allow sufficient expansion space will result in the thrust caused by thermal expansion forcing the hose out of the coupling.

Improper Clamping

Insufficient clamping force, incorrect positioning, or insufficient insertion depth can all result in the clamping force not being distributed effectively.

Mechanical Stress & Vibration

If the hose is pulled too tight to close the gap, it will continue to retract. High-frequency vibrations from the engine can cause the clamps to loosen.

RONTEIX silicone elbow hoses can be used as flexible connectors between rigid aluminium pipes. During installation, care must be taken to leave sufficient clearance between the metal ends to prevent friction and ensure full insertion.

Visible Surface Damage

Surface cracks and fissures, discolouration and yellowing, and the appearance of a white powder.

Loss of Elasticity and Deformation

Silicone may soften or harden, become permanently deformed, or swell.

Performance Issues

A fluid leak, or a hose coming loose from a fitting under pressure. The flow rate drops or becomes erratic.

For the turbo inlet/suction side: Use steel-reinforced silicone tubing to prevent the hose from collapsing under vacuum.

For standard boost lines: Use four reinforcement plies to withstand a boost pressure of 1.5–2 bar.

For high-boost, track and large-diameter applications: use 5-ply reinforcements to prevent the hose from bulging under extremely high boost pressures.

For extreme heat or proximity to exhaust systems: Use a Nomex or aramid reinforcement layer, which offers resistance to ageing and thermal fatigue.