Differences Between Airless Spray Hose and Hydraulic Hose

Differences Between High-Pressure Airless Spray Hose and Hydraulic Hose

High-pressure airless spray hoses and hydraulic hoses may look similar and serve as conduits for high-pressure liquids, but they differ significantly in terms of performance, design standards, and application scenarios. Below is a detailed comparison:

1. Definition and Use

  • High-Pressure Airless Spray Hose
    Designed specifically for airless spray equipment, it is used to transport high-viscosity coatings such as paints and varnishes. Commonly employed in construction, industrial painting, and machinery coating.
  • Hydraulic Hose
    Used in hydraulic systems to transmit high-pressure fluids (e.g., hydraulic oil) to power machinery. Typically found in construction equipment, industrial machinery, and excavators.

2. Pressure Rating

  • High-Pressure Airless Spray Hose
    Typically operates at 200-500 bar.  200bar-227bar are the main pressure range for electric airless spraying, and 200-500bar maximum pressure are mainly for hydraulic / pneumatic airless spraying equipment.
  • Hydraulic Hose
    Operates under significantly higher pressures, ranging from 200 bar to 3000 bar, to meet the demands of hydraulic systems.

3. Material

  • High-Pressure Airless Spray Hose
    Made from high-strength fibers (e.g., nylon) or steel wire braided outer layers. The inner liner is typically a smooth, corrosion-resistant Nylon material to ensure the smooth flow of paint, and the outer material is typically polyurethane.
  • Hydraulic Hose
    Composed of multiple layers of steel wire braiding or winding for reinforcement, with an outer layer of abrasion-resistant rubber and an inner layer of oil-resistant rubber or thermoplastic material to withstand hydraulic oil and high temperatures.

4. Standards

  • High-Pressure Airless Spray Hose Standards
    Typically adheres to manufacturer-specific requirements and may reference industry standards like ISO or EN 1829-2 or SAE 100R7.
  • Hydraulic Hose Standards
    Governed by stricter international standards, such as:

    • ISO 18752 (General hydraulic hose standards)
    • SAE J517 (Industry standards for hydraulic hoses)
    • DIN EN 853/856 (Steel wire-braided or spiral hydraulic hoses)

5. Chemical Resistance

  • High-Pressure Airless Spray Hose
    Prioritizes resistance to solvents and paint chemicals to withstand common paints and solvents.
  • Hydraulic Hose
    Focuses on resistance to hydraulic oils, including anti-oxidation, corrosion resistance, and temperature durability.

6. Flexibility

  • High-Pressure Airless Spray Hose
    More flexible, making it easier to bend and maneuver during spray operations.
  • Hydraulic Hose
    Less flexible due to steel wire reinforcement, with a larger bending radius.

7. Fittings and Connections

  • High-Pressure Airless Spray Hose
    Equipped with fittings designed to match spray machines and spray guns, often with custom thread specifications.
  • Hydraulic Hose
    Uses standard hydraulic fittings for broader compatibility, such as JIC, BSP, ORFS, and others.

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