What is the principle of valve pressure reduction?
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What is the principle of valve pressure reduction? For example, if the pressure before the valve is 3 MPa, it drops to 1 MPa after passing through the valve. Why?
You can visit http://www.famens.com/html/2006/4-5/F16584023539.htm to read \"The Working Principle and Selection of Pressure Reducing Valves\", which I believe will be helpful to you
According to Bernoulli’s equation, reducing pressure should result in an increase in resistance and a decrease in head pressure; therefore, the valve serves to increase resistance
Simply put: a spring is used to control the size of a small hole, ensuring that the pressure of the medium passing through it remains stable, unaffected by fluctuations in external pressure.
The original poster didn’t explain things very clearly. As you said, there can be two scenarios: 1. When the fluid passes through a slightly open valve, the pressure behind the valve decreases due to the resistance posed by the valve. 2 dedicated pressure relief valves; the description on the 2nd floor is very clear
Valve pressure reduction is primarily achieved by the fluid against the valve disc overcoming resistance, which leads to a decrease in energy head and thus pressure reduction; fluid expansion also plays a role in reducing pressure
A pressure relief valve reduces pressure through the intake port, and maintains a constant pressure thanks to the balance of forces on the diaphragm as well as the overflow action of the overflow hole； The output pressure can be adjusted within a certain range by adjusting the spring
In simple terms, it is the conversion of potential energy into kinetic energy
The principle of pressure reduction for devices that are not pressure regulators is throttling-based pressure reduction