Structural principle of cage type regulating valve

It consists of a closing element (sphere), a throttling element, and a flow control mechanism. When the medium enters the cage channel from the bottom, under the action of pressure, the fluid is cut off to achieve the purpose of cutting off; At the same time, due to the pressure difference on both sides of the cage shaped opening, the airflow velocity passing through this aperture increases and forms a negative pressure zone. At this time, the gas flow rate at the inlet increases, resulting in a component force in the same direction acting on the main spring, pushing the piston downward and causing the outlet to open; On the contrary, the opposite is true. This type of valve controlled by the principle of force separation is called a cage type regulating valve or an air open temperature and pressure reducing valve.