The first stage engine brake
Increased discharge of equalization tank in this case (the normal discharge of 0.6-0.7 kg/cm2) is needed to ensure the operation of the braking wound number 254 and a pressure in the brake cylinders of more than 0.5 kgf/cm2, sufficient to compress the spring brake ottormazhivatsya cylinders and pressing pads. At a lower level of pressure on the diffuser, included in the empty mode, acting on the piston is a valve number 254 (0.5-0.7 kg/cm2), enough to open the valve 2, 3 pressed against spring force and the pressure feed line from the cavity 4, and create pressure under the piston 1iv brake cylinders of more than 0.5 kgf/cm2.