How do fluid properties affect the working performance of throttle valves?

In fluid control systems, throttle valves play a vital role. Their working performance directly determines the fluid flow, pressure and stability of the overall operation of the system. However, the performance of throttle valves does not exist in isolation. They are deeply affected by the properties of fluids. This article aims to explore in depth how fluid properties affect the working performance of throttle valves.

1. The viscosity of the fluid is one of the key factors affecting the working performance of the throttle valve. Viscosity is a measure of the internal resistance of the fluid. When a high-viscosity fluid passes through the throttle hole of the throttle valve, it will face greater flow resistance. Under the same pressure difference, the flow rate of the high-viscosity fluid will be relatively small, thus affecting the flow regulation ability of the throttle valve. In addition, high-viscosity fluids may also cause deposition and blockage in the throttle hole, further affecting the accuracy and reliability of the throttle valve.

2. The density of the fluid is also an influencing factor that cannot be ignored. When a fluid with high density passes through a throttle valve, it will generate greater inertial force due to its large mass, which may cause the flow state of the fluid at the throttle hole to change, such as generating eddy currents or turbulence. These complex flow phenomena will increase the energy loss of the fluid and may also affect the sealing performance and wear of the throttle valve.

3. The temperature of the fluid also has a great influence on the working performance of the throttle valve. Temperature changes will cause changes in the physical properties of the fluid, such as changes in viscosity and density. High-temperature fluids may soften or expand the sealing material of the throttle valve, resulting in a decrease in sealing performance; while low-temperature fluids may cause the material to shrink or harden, affecting the flexibility of the valve and the smoothness of opening and closing. Temperature changes may also cause changes in the internal pressure of the fluid, thereby affecting the flow and pressure control accuracy of the throttle valve.

4. Impurities and corrosive substances in the fluid are also important factors affecting the working performance of the throttle valve. Impurities may block the throttle hole or wear the valve disc and sealing surface, causing valve leakage or failure; while corrosive substances may corrode the valve material, reducing its strength and corrosion resistance. These factors will seriously damage the working performance and service life of the throttle valve.