Air Brakes Relay Valve sany mixer truck parts

Air Brakes Relay Valve SANY mixer truck parts manufacturer and supplier in China. We are supplier of all range parts of SANY mixer truck.

Description of Air Brakes Relay Valve

Differential relay valve is a part of automobile air brake system. In the braking system of truck, differential relay valve can shorten reaction time and pressure setting time.

The air inlet of the differential relay valve is connected with the air reservoir, and the air outlet is connected with the brake air chamber. When the brake pedal is pressed, the output air pressure of the brake valve is used as the control pressure input of the differential relay valve. Under the action of the control pressure, the inlet valve is pushed open, so the compressed air enters the brake chamber directly through the air inlet from the air reservoir, instead of passing through the brake valve. This greatly shortens the charging pipeline of the brake chamber and accelerates the charging process of the air chamber. Therefore, differential relay valve is also called acceleration valve.

The differential relay valve is used at the end of the long pipeline to make the compressed air of the air reservoir quickly fill the brake chamber, such as in the braking system of trailer or semi-trailer.

Generally, differential relay valve is used. It can prevent the driving and parking system from operating at the same time, and the force in the combined spring brake cylinder and spring brake chamber can be overlapped, so as to avoid the overload of mechanical transmission components and make the spring brake cylinder quickly charge and exhaust.