The utility model relates to railway transport, to the part of mechanical protection of the anti-union valve in the brake system of the rolling stock. The technical objective of the proposed utility model is to increase the reliability of the three-position dump valve and to protect the air channels for the release of compressed air in the winter from snow and icing as a result of sharp the difference in ambient temperature associated with the work located nearby, traction and braking equipment. result is achieved in that the valve resets three-position attached by four bolts casing. The casing consists of a frame made of a metal sheet in the form of a rectangular-shaped container with an inclined bottom, in which there is a pipe with a rubber valve mounted on it, secured with a clamp to discharge compressed air and condensate from the inner space of the casing. 2 ill.
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