The SDS cutting nozzle is an effective tool in the realm of oxy-fuel cutting, known for its durability, efficiency, and precision. Proper selection and maintenance of the nozzle are crucial for achieving the best results in metal cutting applications.

The Laval nozzle consists of a converging inlet and a diverging outlet duct. The term often used is convergent-divergent (CD) nozzle.

Supersonic jets are produced using convergent/divergent (Laval) nozzles. A stagnant reservoir of oxygen remains under pressure, Po. The oxygen accelerates in the convergence section and reaches the speed of sound (Mach number = 1) in the cylindrical throat region.

The oxygen then expands in the divergent section. The expansion reduces the oxygen’s temperature, density, and pressure, and its speed increases to supersonic levels (above Mach 1).