The reason why the four-circuit protection valve has five valves is to ensure the safety and reliability of the air circuit system.
The four-circuit protection valve is actually a five-way joint, which divides the entire vehicle air circuit into four interconnected and independent circuits through five valves (or channels). The functions of these five valves are as follows:
Air inlet: Compressed air enters the four-circuit protection valve through this port, and then enters the four circuits of the system through the bypass hole and the one-way valve.
Five channels: These five channels connect four circuits and one bypass hole respectively. When a circuit fails, the air of other circuits can continue to be supplied through the bypass hole to ensure the normal operation of the system.
The working principle of the four-circuit protection valve is to protect each circuit by adjusting the air pressure. When a circuit reaches the set opening pressure, the valve opens, the diaphragm bulges against the spring force, and allows compressed air to flow into the corresponding circuit. If a circuit fails, the air of other circuits will be supplemented through the bypass hole until the dynamic closing pressure is reached. At this time, the spring force will close the valve to protect the normal operation and inflation of other circuits.
Through this design, the four-circuit protection valve not only diverts the air pressure, but also plays the role of pressure regulation and diversion, ensuring that when a circuit fails, it will not affect the normal operation and inflation of other circuits.
