19518 - Purox 4217 Series Propane/Natural Gas Outer Sleeve Nozzle

Technical Overview of the ESAB Purox 4217 Series External Sleeve

The ESAB Purox 4217 Series External Sleeve (SKU: 19518) is a specialized component designed for two-piece oxy-fuel cutting tip assemblies. Engineered specifically for use with alternative fuel gases such as Natural Gas and Propane, this sleeve functions as the outer shell that directs the preheat flames and protects the internal splined insert. The separation of the sleeve from the inner member is a characteristic design of high-efficiency tips intended for slower-burning gases, allowing for a recess that anchors the flame and ensures stable combustion even at high flow rates.

This particular model covers a cutting capacity range of 1/4 inch to 2 inches, making it a versatile choice for general fabrication and maintenance repair operations. By utilizing a two-piece design, the 4217 series allows operators to replace only the damaged component—either the inner member or the outer sleeve—rather than discarding the entire tip, thereby reducing long-term consumable costs. The sleeve is manufactured from high-grade copper alloy materials capable of withstanding the intense thermal cycling inherent in industrial cutting environments.

Compatibility is key with the 4217 series; it is designed to mate perfectly with Purox-style torches and cutting attachments. The internal geometry of the sleeve is precision-machined to ensure concentricity with the inner tip, which is vital for maintaining a uniform preheat flame ring and a straight, non-turbulent cutting oxygen stream. The external surface is finished to resist the adhesion of molten slag and spatter, prolonging the service life of the nozzle and maintaining clear gas passages. This component is essential for users transitioning from acetylene to propane or natural gas to leverage fuel cost savings without compromising cut quality.

In industrial MRO settings, the reliability of the cutting flame is paramount. The ESAB Purox 4217 sleeve ensures that the preheat flames are properly focused, providing the necessary thermal energy to bring the base metal to kindling temperature rapidly. Its robust construction ensures it maintains its dimensional integrity even after prolonged use, preventing issues such as flashbacks or irregular flame patterns that can result from deformed or worn tip orifices.