150Z20 - ESAB Purox W-300 Disc Mixer No. 8

Technical Overview of the ESAB 150Z20 Disc Mixer

The ESAB 150Z20 is a specialized Disc Mixer, size No. 8, engineered for integration with the Purox W-300 series welding handles. In oxy-fuel welding and heating applications, the mixer plays a critical role in safety and performance. It serves as the chamber where positive-pressure oxygen and fuel gas (typically acetylene, though other fuel gases may be used depending on the tip configuration) are combined in precise volumetric ratios. This specific model utilizes a disc-type mixing mechanism, which is renowned for its resistance to backfire and its ability to maintain a consistent flame profile under varying thermal loads.

Manufactured from high-grade brass, the 150Z20 offers superior thermal conductivity and corrosion resistance, essential for components exposed to the high-temperature environment of industrial welding. The machining tolerances are held to strict standards to ensure a gas-tight seal when seated in the torch handle and when coupled with the welding head or heating nozzle. The No. 8 sizing indicates its flow capacity, making it suitable for a specific range of welding tip sizes that require medium-to-high gas volume for thicker material fabrication.

Proper maintenance and selection of the mixer are paramount for operational safety. The ESAB 150Z20 is designed to mitigate the risks associated with flashback by ensuring that the gas velocity at the mixing point is optimized. Industrial MRO procurement specialists should verify compatibility with existing W-300 handles to ensure seamless replacement and operation. This component is a direct OEM replacement, ensuring that the original performance specifications of the Purox torch system are maintained.