Mt 318Nv, three hose machine torch. Lp/ Natural Gas use (may also be used on other fuel gases except Acetylene). three hose torches are high performance "straight through" design that minimizes turbulence and improves cut quality. Accessory reverse flow check valves are supplied for use at the torches inlet connection. All machine torches use Series 1 cutting tips and are supplied with accessory reverse flow check valves to be used on the torch inlet connections. Gear racks must be ordered separately.