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DURO 90 DRING KIT (CAT EQUIVALENT P/N 270-1535 (4C4784)

DURO 90 DRING KIT (CAT EQUIVALENT P/N 270-1535 (4C4784)

  • OEM Equivalent D-rings
  • Nitrile Material 
  • Duro 90 Hardness 
  • 186 Piece KitAvailability: 77 in stock

    $280.00 AUD
    $280.00 AUD
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  • Description
  • OEM Equivalent D-rings
  • Nitrile Material 
  • Duro 90 Hardness 
  • 186 Piece Kit

Quantities included in the kit 

  • 1P-3700 – 20 pcs

  • 1P-3702 – 10 pcs

  • 1P-3703 – 10 pcs

  • 1P-3704 – 10 pcs

  • 1P-3705 – 20 pcs

  • 1P-3706 – 16 pcs

  • 1P-3707 – 20 pcs

  • 1P-3708 – 40 pcs

  • 1P-3709 – 40 pcs

 

Uses of Nitrile Duro 90 D-Rings in Earthmoving Equipment

Nitrile (NBR) Duro 90 D-Rings are engineered for heavy-duty sealing applications where components are exposed to high pressure, hydraulic oils, and mechanical stress. Their hardness rating of 90 durometer makes them ideal for demanding earthmoving and heavy-diesel environments that require exceptional extrusion resistance and long-term durability.

Where Nitrile Duro 90 D-Rings Are Commonly Used

  • High-pressure hydraulic systems including pumps, cylinders, valve blocks, and control circuits.

  • Diesel, engine-oil, and transmission-oil sealing points where strong fluid compatibility is essential.

  • Static and slow-moving dynamic interfaces that experience substantial mechanical load or pressure spikes.

  • Heavy-duty connectors, JIC fittings, and flange interfaces found across mobile plant and earthmoving machinery.

Why Duro 90 Nitrile Is Selected

  • Superior extrusion resistance due to the higher hardness (90A), preventing seal blowout in high-pressure systems.

  • Excellent compatibility with petroleum-based fluids, including hydraulic oil, diesel fuel, engine oil, and gear oil.

  • Good abrasion resistance, making it suitable for equipment operating in harsh, dirty environments.

  • Reliable performance across a broad temperature range, typically from –30 °C to +120 °C depending on compound formulation.

  • High tear strength and compression resistance, supporting long service life under heavy mechanical loads.

Limitations and When Not to Use Nitrile Duro 90

  • Not ideal for high-temperature environments above the recommended range; elevated heat may harden or crack the material.

  • Limited resistance to ozone, UV and outdoor weathering compared with silicone or EPDM.

  • Less suited to aggressive chemicals such as brake fluids, certain additives, or highly aromatic fuels.

Practical Examples in Earthmoving Equipment

  • Hydraulic cylinder end caps, piston interfaces, and rod-side sealing locations subject to high fluid pressure.

  • High-pressure supply and return line connections, particularly where extrusion risk is present.

  • Drivetrain and engine-oil system fittings requiring robust oil-resistant sealing.

  • Pump housings and valve manifolds that experience continuous hydraulic pressure loads.

Material-Selection Guidance

  • Choose Nitrile Duro 90 for high-pressure, oil-immersed environments where mechanical load and extrusion resistance are critical.

  • For high-temperature or outdoor weather-exposed locations, consider other elastomers better suited to heat or UV resistance.

  • Ensure the hardness and material type match the system’s pressure rating, fluid type, and operating conditions.