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The ESAB 20918 is a specialized Gas Baffle designed for use within the head assembly of ESAB PT-15 and PT-19 plasma cutting torches. This component plays a critical role in the fluid dynamics of the plasma gas, specifically engineered for "Reverse Flow" applications. The baffle features a precise hole configuration of eight (8) holes, each with a diameter of 0.067 inches. This geometry is calculated to induce the correct swirl velocity and pressure drop required to center the plasma arc on the electrode emitter and constrict it through the nozzle orifice.
In high-amperage mechanized plasma systems like those utilizing the PT-15 and PT-19, the gas baffle (often referred to as a gas distributor) separates the plasma gas supply into a vortex flow. This vortex stabilizes the arc column and protects the nozzle bore from double-arcing. The "Reverse" designation typically refers to the direction of the gas swirl or the specific plumbing configuration of the torch for certain cutting gases or beveling applications. Using the correct baffle is essential; an incorrect hole size or flow direction can lead to immediate consumable failure, poor cut angularity, or inability to initiate the pilot arc.
Constructed from high-grade, heat-resistant materials, the 20918 baffle withstands the intense thermal environment inside the torch head. However, it is a wear item that can become clogged with contaminants or degraded by heat over time. Regular inspection of the baffle for cracks, clogged ports, or deformation is recommended during standard consumable change-outs to ensure system reliability and cut consistency.
| Additional Information |
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| Packaging Description:1 Per Ea, pack of 1 |
| Product Type:Gas Baffle |
| Compatible Torch:PT-15, PT-19 |
| Part Number:20918 |
