22359 - ESAB Purox 22359 Replacement Marginal Spring for R-6700 Regulators

Precision Replacement for Industrial Gas Control

The ESAB 22359 Marginal Spring is a critical replacement component designed exclusively for the R-6700 series regulators. In the realm of industrial gas control, the integrity of every internal component is paramount to ensuring both safety and performance. The R-6700 series, often associated with the legacy Purox brand, is a workhorse in heavy-duty oxy-fuel applications. Over time, internal springs can suffer from fatigue, corrosion, or plastic deformation, leading to erratic pressure delivery or failure to maintain set pressures. This genuine OEM part allows maintenance personnel to restore the regulator to its original factory specifications.

Engineered from high-quality spring steel, this marginal spring is manufactured to exact tolerances regarding coil diameter, wire gauge, and free length. These specific dimensions are essential for maintaining the correct force balance within the regulator's mechanism. Using non-OEM springs in high-pressure gas equipment can result in dangerous malfunctions, including creep or diaphragm rupture. By selecting the ESAB 22359, you ensure that the spring rate matches the design requirements of the R-6700's valve assembly, guaranteeing smooth and responsive pressure adjustment.

This component is typically required during a comprehensive regulator overhaul or rebuild. When servicing gas equipment, it is standard practice to inspect all dynamic components. If the existing marginal spring shows signs of wear, pitting, or loss of tension, immediate replacement is necessary to preserve the regulator's UL listing and operational safety. This part is supplied individually and is ready for installation into the regulator body.

Technical Application

The marginal spring functions within the regulator to provide a specific counter-force or seating pressure, depending on the specific internal configuration of the R-6700 model. It works in unison with the diaphragm and valve seat to modulate gas flow from the high-pressure cylinder to the low-pressure outlet. Proper installation requires a clean environment and adherence to ESAB's maintenance procedures for gas apparatus.