Interlock Hose Fittings

Interlock Hose Fittings

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Interlock hose fittings are designed for the heavy duty pressure, high temperature and large bore wire spiral hoses, it the strongest connection between with the crimped interlock ferrule fittings and six wire spiral skive hose. Interlock swage fitting can lock and seal of interlock hydraulic hose assembly, the connections type is from the various tube or stud connections to interlock hose ends.

Interlock hydraulic fitting Standard and Types:

Hydraulic Hose Types of Interlock Fittings

ISO type R13, EN 856 R13 and SAE J517 100R13 hoses are with a high-pressure rating having a multiple steel wire spiral.

ISO type R15 and SAE J517 100R15 hoses are heavy duty high temperature hoses with an extra high-pressure rating having a multiple steel wire spiral.

Tube or Stud Connections of Interlock Fittings

ISO -1 Standard of O-ring face seal hose connector SAE ORFS

ISO -2 Standard of 24 degree hose connector DIN

ISO -3 Standard of four bolt flange head hose connector SAE J518

ISO -5 Standard of 37 degree flare hose connector JIC

ISO -6 Standard of 60 degree cone hose connector BSP

Assembling Interlock Fittings

1. Prepare Interlock fittings including separate socket and nipple, hydraulic hoses.

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2. Cut off the length of hose

3. skive the hose cover and the inner tube of the hose

4. Assemble the nipple and socket and hose and crimped

5. Crimping correctly: the one tooth of socket at the shoulder end will tightly press the steel wire reinforcement layer of the hose that had been skived inner tube on the groove of nipple, form a strong anti-pulling force. Other teeth of the socket will crimp on the hose with inner tube to the nipple tail and keep sealing under higher pressure and temperature.

Application of Interlock Hydraulic Hose Assembly

Those interlock hose assemblies are used under very high pulsating pressure conditions such as hydraulic excavator, rotary drill rig etc.

Catalog of Interlock Fittings and Ferrules

Interlock ferrules series part no. is and matched hose tail series part no. is xxxx3-xx-xx. interlock hose fittings are made of carbon steel or stainless steel, for nominal hose inside diameters of 32 mm to 51 mm, inclusive.

Interlock hose fittings are a type of high-performance fitting designed for creating secure and reliable connections between hoses and other piping components. 

Interlock hose fittings are specifically designed for hoses that have undergone a process called six-wire skiving. 

• Six-Wire Skiving: This involves precisely removing a specific layer of the outer rubber and a portion of the steel braid reinforcement of the hose at both the inner and outer diameter. This creates a &#;skived&#; section with exposed wires.
• Dual Purpose Skiving: The skiving serves two crucial functions:
  
  • Locking: The exposed wires on the braid interlock with ridges or teeth on the inner part of the interlock fitting, creating a strong mechanical grip that prevents the hose from pulling out under pressure.
  • Sealing: The skived section also allows for a tight seal between the hose and the fitting. An O-ring or gasket within the fitting often complements this seal for maximum leak prevention.

Strongest Connection: Because of this dual locking and sealing mechanism, interlock fittings are widely considered the most secure and reliable connection method for hoses compared to traditional fittings like clamps or crimps.

Here&#;s an analogy: Imagine the skived section of the hose like a handshake with exposed fingers. The interlock fitting acts like another hand with grooves that interlock with the fingers, creating a strong hold. The O-ring adds an extra layer of security like a tight clasp around the handshake.

Applications: Due to their superior strength and leak-proof design, interlock fittings are ideal for demanding applications like:

• High-pressure hydraulic systems
• Conveying hazardous fluids or abrasive materials
• Harsh environments with extreme temperatures or vibrations

While interlock fittings offer top-notch security, it&#;s important to consider their cost and potential overkill for less critical applications.

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