A throttle valve is a valve used to regulate the flow of fluid in a pipeline. Its function is to control the flow of fluid by changing the throttle section or throttle length. The working principle of a throttle valve is based on changing the size of the pipeline cross section to affect the flow of fluid.When the fluid passes through the throttle valve, the velocity of the fluid increases due to the reduction of the pipeline cross section, resulting in pressure loss (also called resistance).
This pressure loss will cause the fluid temperature to rise and energy to be lost. Throttle valves have a wide range of applications, including but not limited to:
In heating, air conditioning and refrigeration systems, throttle valves are used to adjust the flow of hot and cold streams to achieve the desired temperature.
In hydraulic systems, throttle valves are used to regulate the flow of hydraulic oil to ensure that the pressure in the system remains within a safe range.
In automobile engines, throttle valves are used to control the flow of intake and exhaust air to improve combustion efficiency and reduce emissions.
In the oil and gas industry, throttle valves are used to control the flow of fluids to prevent blowouts and fire accidents.
In addition, the throttle valve can also be combined with a one-way valve to form a one-way throttle valve. In the quantitative pump hydraulic system, the throttle valve and the relief valve can form three throttling speed control systems, namely the oil inlet throttling speed control system, the oil return throttling speed control system and the bypass throttling speed control system. Although the throttle valve has no flow negative feedback function and cannot compensate for the speed instability caused by load changes, it is usually only used in occasions where the load changes are not large or the speed stability requirements are not high.
