Cold-Flex 404 hose pipe [blue]

Description

Specification	Detail / Value (Based on 2 mm Series)	Notes
Product Name	COLDFLEX 404	Part of the 2 mm flexible hose line.
Product Type	Flexible Capillary/Instrumentation Hose	Used for pressure sensing, not bulk flow.
Color	Blue	Used for visual identification, often designated for the low-pressure side or specific control circuits in refrigeration.
Inner Diameter (ID)	2.20 mm	The precise inner measurement.
Outer Diameter (OD)	5.65 mm	Ensures proper fit with standard Cold-Flex fittings
Construction Standard	Meets or Exceeds EN 1736	The European standard for flexible refrigerant hoses and assemblies.
Max Working Pressure (WP)	50 bar (tested 350 bar proof pressure )	The maximum sustained safe working pressure. Note: The hoses have an extremely high burst rating (often $\mathbf{700 \text{ bar}}$ or more).
Burst Pressure	Tested to exceed 1000 bar ( ex 1028 bar)	Provides a massive safety margin.
Refrigerant Compatibility	Tested for low permeability with refrigerants like R410A	Ensures minimal refrigerant loss over time, meeting EN 1736 standards
Minimum Operating Temp	Cold Flexible Rating (Typically $\mathbf{-20^\circ\text{C}}$ or lower)	Maintains flexibility in cold environments.

Vibration Elimination: This is the core purpose. The hose provides a flexible connection that dampens vibrations from compressors and other moving parts, ensuring connected manometers, transducers, and pressure switches receive stable, accurate signals.
High-Pressure Safety Margin: The construction includes internal reinforcement (braiding) to achieve very high burst pressure (over 1000 bar), providing exceptional safety and durability under continuous working pressures up to 50 bar.
Low Permeability: Critical for closed refrigeration systems. The material is designed to minimize the diffusion of refrigerant (like R410A) through the hose wall, leading to long-term system efficiency.
Color Coding (Blue): In line with standard HVAC/R practices, the Blue color allows technicians to immediately identify the line, often corresponding to the low-pressure/suction side of the system.
Refrigerant/Oil Resistance: The polymer used is selected for its resistance to both the gas/liquid refrigerant and the lubricating oils within the system.

COLDFLEX 404	COLDFLEX 404 is a durable, blue, high-pressure flexible capillary hose designed for the safe, stable, and color-coded connection of pressure and control instruments in cold HVAC and refrigeration systems.

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