Structural principle of automatic exhaust valve

Structural Principle

There is a float inside the valve body, which has a lower density and can float on the liquid surface. When gas accumulates at the top of the valve in the system, the pressure of the gas will push the float to sink. The sinking of the float causes the piston inside the valve to move upwards, and the gap allows gas to escape from the top of the valve. When the internal gas of the system is exhausted, the valve closes and the float will float up and return to its initial position.

 

Working Principle

When the system is filled with water, the gas in the water continuously escapes and accumulates towards the highest point due to temperature and pressure changes. When the gas pressure is greater than the system pressure, the float will fall and drive the valve stem to move downwards, opening the valve port and continuously discharging the gas. When the gas pressure is lower than the system pressure, the float rises and drives the valve stem to move upwards, closing the valve port. The automatic exhaust valve is constantly circulating like this!