The relay valve of Sany excavator accessories has the following main applications:

1. Accelerate the braking response: In the braking system of the excavator, when the driver steps on the brake pedal, the air pressure output by the brake valve is transmitted to the relay valve as a signal. After receiving the signal, the relay valve quickly delivers the compressed air in the air reservoir to the brake air chamber, so that the brake device quickly generates braking force, greatly shortening the braking reaction time. This is very important for excavators that need to brake frequently or in emergency situations. It can effectively reduce the speed of the excavator in a timely manner and ensure operational safety.
2. Enhance the braking effect: Ensure that the brake air chamber can obtain sufficient compressed air in a timely and sufficient manner, so that the brake device can generate strong braking force. When the excavator is performing excavation, loading and other operations, it has a large weight and a complex working environment, and a reliable braking system is required to ensure safety. The existence of the relay valve can ensure the stable performance of the braking system and enhance the braking effect.
3. Auxiliary air circuit control: In addition to playing an important role in the braking system, the relay valve can also play an auxiliary control role in other air circuit control systems of the excavator. For example, in some working devices that need to be driven by air pressure, the relay valve can quickly switch the on and off of the air circuit according to the control signal to realize the motion control of the working device. For example, some auxiliary devices of the excavator, such as the pneumatic control parts of the bulldozer and the breaker, may use the relay valve to realize fast air circuit switching and motion control.
4. Maintain stable air circuit pressure: In the air circuit system, the relay valve can play a certain role in pressure regulation. When the pressure in the air circuit fluctuates, the relay valve can be adjusted according to the set pressure range to keep the pressure in the air circuit relatively stable. This is very critical for some components or systems of the excavator that have high requirements for air pressure stability, and can ensure their normal operation.