48R330 - Surfox Replacement Polyethylene Tubing 4mm x 6mm

Technical Overview of Walter 48R330 Polyethylene Hose

The Walter 48R330 is a specialized polyethylene (PE) hose designed primarily for use within the fluid delivery systems of Walter Surface Technologies' Surfox electrochemical weld cleaning machines. This component is critical for the safe and efficient transport of electrolyte solutions from the internal reservoir to the application wand. The tubing features precise metric dimensions with an inner diameter (ID) of 4mm and an outer diameter (OD) of 6mm, ensuring a leak-free seal when used with standard metric push-to-connect fittings or compression fittings found on Surfox units.

Polyethylene is selected for this application due to its robust chemical resistance properties. Surfox systems utilize phosphoric acid-based electrolytes which can degrade lesser materials over time. The PE construction of the 48R330 resists hydrolysis and chemical attack, maintaining structural integrity even with prolonged exposure to acidic fluids. This prevents brittleness, cracking, and subsequent leaks that could damage internal machine components or pose safety hazards to the operator.

From a maintenance perspective, using the correct OEM specification tubing is vital for maintaining the calibrated flow rates of the machine. The 4mm ID provides the specific hydraulic diameter required for the pump system to deliver the optimal amount of fluid to the cleaning pad. Deviations in diameter could lead to pump strain or insufficient fluid delivery, compromising the passivation process. This hose is supplied as a direct replacement part, meeting all original manufacturing tolerances for the Surfox product line.

Key Technical Specifications:

• Material: Linear Low-Density Polyethylene (LLDPE) or similar industrial grade PE.


• Dimensions: 4mm ID x 6mm OD.


• Chemical Compatibility: Excellent resistance to acids, alkalis, and aqueous solutions.


• Flexibility: Moderate flexibility for internal routing without kinking.