Nylon Resin Pressure Measuring Hoses: Precision Instruments for High-Pressure Diagnostics
Key Design Features for Measuring Applications
Pressure measuring hoses in the nylon resin family are designed with distinct characteristics:
Small Diameter: Typically ranging from 1.5mm to 8mm inner diameter, minimizing the influence on the system's pressure dynamics.
High Pressure Capability: Despite compact dimensions, they handle significant pressures. Standard measuring hoses often operate at 63MPa with burst pressures reaching up to 260–370MPa.
Flame Retardant & Self-Extinguishing: Critical for safety in maintenance and test environments where sparks or high temperatures may be present.
High Compatibility: Resistant to hydraulic oils, mineral oils, water-glycol emulsions, and other common industrial fluids.
Structural Constructio
Most measuring hoses adopt a two-layer design:
Inner Core: Extruded nylon resin (PA) providing a gas/liquid-tight barrier with minimal volumetric expansion, ensuring accurate pressure transmission.
Reinforcement: High-tensile steel wire braid or spiral wrapped to absorb internal pressure loads and prevent bursting.
Outer Layer (Optional): A thin polyurethane or nylon jacket for added wear resistance in abrasive work environments.
Primary Applications
Connecting pressure gauges to hydraulic valve blocks, cylinders, and pumps.
Linking pressure transmitters to data acquisition systems for performance testing.
Temporary pressure taps for troubleshooting and maintenance diagnostics.
Use in laboratory test benches and hydraulic power units.
Comparison with Conventional Metal Lines
Nylon resin measuring hoses offer a distinct advantage over copper or stainless steel capillary tubes:
Vibration Dampening: Absorbs mechanical vibrations from pumps and motors, protecting sensitive gauge internals from fatigue.
Ease of Installation: Flexible, allowing for easy routing around machine components without requiring precise tube bending.
Kink Resistance: Maintains a consistent flow path even when routed through tight spaces, minimizing the risk of blockages.
Corrosion Resistance: Unlike metal tubes, nylon resin is immune to rust and corrosion from moisture or aggressive fluids.
Selection Criteria
When choosing a pressure measuring hose, consider:
System operating and peak pressure
Fluid type compatibility
Environmental temperature range
Required length and connection fittings
Need for outer abrasion protection
