Local reduction valve stem applicable to small pressure reduction brake air distribution valves of railway passenger vehicles

The invention discloses a local reduction valve stem applicable to small pressure reduction brake air distribution valves of railway passenger vehicles. The local reduction valve stem is characterizedin that radial air channels and an axial air channel are arranged on the local reduction valve stem, one end of the axial air channel is correspondingly communicated with exhaust holes in a local reduction valve bonnet, the other end of the axial air channel extends into the local reduction valve stem and is communicated with an end of each radial air channel, the other end of each radial air channel is communicated with pressure air in a train pipe, and the pressure air in the train pipe can be transmitted through the radial air channels and the radial air channel and can be exhausted to theatmosphere via the exhaust holes in the local reduction valve bonnet. The local reduction valve stem has the advantages that the air channels are arranged in the local reduction valve stem, the pressure air in the train pipe