Heating "Donmet" 218. Test

The heating torch "DONMET" 218, hereinafter referred to as the torch, is designed for heat treatment of rails.
DESIGN AND PRINCIPLE OF OPERATION
The torch consists of a shank, tip and a head.
The torch shank has adjusting valves for oxygen (blue) and acetylene (red).
The gas valves consist of a stem with a locking cone, a knob, sealing rings and a sealing nut.
The tip has a mixing chamber and injector for making oxy-gas mixture and supplying this mxture to the head union. The union equpped with inlets for supplying and draining coolant into the head cooling circuit. The inlets (oxy-gas mixture and coolant) are closed with a hermetic casing. Ther is a safety valve installed in that casing.
The head is installed on the tip and serves to form a flame. The head has a cooling circuit that connects to the inlets on the tip.
The oxygen is delivered to the torch by a hose through a nipple attached to the torch with a slip nut that has right-hand thread G1/4 and further through the blue oxygen valve into the mixing device (injector).
Acetylene is delivered to the torch by a hose through a nipple attached to the torch with a marked slip nut, that has left-hand thread G1/2 LH and further through the red gas fuel valve into the mixing device (injector).
Gas flow is adjusted with the corresponding valves.