The invention relates to an operating valve and a railway
vehicle braking system, and belongs to the technical field of railway
vehicle braking. The operating valve comprises a valve body, a valve rod
assembly, a restoration
assembly and a control
assembly. The valve body is provided with a main
air cavity, an output cavity and a precontrol cavity, and the restoration assembly is used for driving the valve rod assembly to close a first
valve port; the control assembly is located in the main
air cavity and communicated with the external air, the control assembly can drive a valve rod to move in the length direction of the valve rod, and the control assembly and the valve rod are used in cooperation for achieving communication or disconnection between the main
air cavity and the output cavity, and between the output cavity and the external air. The operating valve is reasonable in structural design, the
valve port sealing effect is good, a planar diaphragm plate is durable, pressure precontrol is precise, the service life of the product is long, and the demand of a user is met. According to the railway
vehicle braking system with the operating valve, a braking assembly can be precisely controlled, so that precise braking of a railway vehicle is achieved, and safe running of the railway vehicle is guaranteed.