Eccentric hemispherical valve is a commonly used control valve, whose main function is to control the flow rate and pressure of fluids. Its working principle is to control the flow rate and pressure of the fluid by rotating the hemispherical valve core, thereby achieving fluid control and regulation. Below, we will provide a detailed introduction to the working principle, structural characteristics, and application fields of eccentric hemispherical valves.
1、 Working principle
The working principle of an eccentric hemispherical valve is to control the flow rate and pressure of the fluid by rotating the hemispherical valve core. When the hemispherical valve core rotates, fluid will flow into the interior of the hemispherical valve core from the inlet of the valve, and then flow out through the outlet of the hemispherical valve core. The rotation angle of the hemispherical spool determines the flow rate and pressure of the fluid, so fluid control and regulation can be achieved by controlling the rotation angle of the hemispherical spool.
2、 Structural characteristics
The structural characteristics of eccentric hemispherical valves mainly include the following aspects:
1. Valve body: The valve body of an eccentric hemispherical valve usually adopts a spherical structure, with one side of the sphere being hemispherical and the other side being circular. The hemispherical side is the inlet of the valve, and the circular side is the outlet of the valve.
2. Hemisphere valve core: The hemisphere valve core is the core component of an eccentric hemisphere valve, and its shape is similar to a hemispherical bowl. One side of the hemispherical valve core is convex, and the other side is concave. The protruding side corresponds to the hemispherical side of the valve body, and the concave side corresponds to the circular side of the valve body.
3. Transmission device: The transmission device of the eccentric hemispherical valve usually adopts manual, electric or pneumatic transmission device. Manual transmission devices usually use handwheels or handles, electric transmission devices usually use motors and reducers, and pneumatic transmission devices usually use pneumatic actuators.
4. Sealing structure: The sealing structure of eccentric hemispherical valves usually adopts soft sealing or metal sealing. Soft seals are usually made of materials such as rubber or polytetrafluoroethylene, while metal seals are usually made of materials such as stainless steel or titanium alloy.
3、 Application Fields
Eccentric hemispherical valves are widely used in industries such as petroleum, chemical, metallurgical, power, and water treatment, mainly for controlling fluid flow and pressure. Its advantages include simple structure, easy operation, good sealing, strong corrosion resistance, and long service life. In the petroleum and chemical industry, eccentric hemispherical valves are commonly used to control high temperature, high pressure, and highly corrosive media such as acids, alkalis, salts, etc. In the water treatment industry, eccentric hemispherical valves are commonly used to control the flow and pressure of media such as sewage and wastewater.
In short, eccentric half globe valve is a commonly used control valve, which works by rotating the half globe valve core to control the flow and pressure of fluid. Its structural characteristics are simple, easy to operate, good sealing, strong corrosion resistance, and long service life. It is widely used in various fields, mainly in industries such as petroleum, chemical, metallurgy, power, and water treatment.
