What is an eccentric semi-ball valve? Working principle of eccentric semi-ball valve

The eccentric semi-ball valve is a commonly used control valve, its main function is to control the flow and pressure of fluid. Its working principle is to control the flow and pressure of the fluid by rotating the hemispherical valve core, thereby achieving control and regulation of the fluid. Let's introduce in detail the working principle, structural characteristics and application fields of the eccentric semi-ball valve. 1. Working principle

The working principle of the eccentric semi-ball valve is to control the flow and pressure of the fluid by rotating the semi-ball valve core. When the hemispherical valve core rotates, the 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 valve core determines the flow and pressure of the fluid, so the control and regulation of the fluid can be achieved by controlling the rotation angle of the hemispherical valve core.

2. Structural characteristics

The structural characteristics of the eccentric semi-ball valve mainly include the following aspects:

1. Valve body: The valve body of the eccentric semi-ball valve usually adopts a sphere structure. One side of the sphere is hemispherical and the other side is round. The hemispherical side is the inlet of the valve, and the round side is the outlet of the valve.

2. Semi-spherical valve core: The semi-spherical valve core is the core component of the eccentric semi-ball valve. Its shape is similar to a hemispherical bowl. One side of the hemispherical valve core is convex and the other side is concave. The convex side corresponds to the hemispherical side of the valve body, and the concave side corresponds to the rounded side of the valve body.

3. Transmission device: The transmission device of eccentric semi-ball 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 semi-ball valve usually adopts soft seal or metal seal. Soft seals usually use materials such as rubber or polytetrafluoroethylene, and metal seals usually use materials such as stainless steel or titanium alloy.

3. Application fields

Eccentric semi-ball valves are widely used in petroleum, chemical industry, metallurgy, electric power, water treatment and other industries, and are mainly used to control the flow and pressure of fluids. Its advantages are simple structure, easy operation, good sealing, strong corrosion resistance, long service life, etc. In the petroleum and chemical industries, eccentric semi-ball valves are usually used to control high temperature, high pressure, and highly corrosive media, such as acids, alkalis, salts, etc. In the water treatment industry, eccentric semi-ball valves are usually used to control the flow and pressure of media such as sewage and wastewater.

In short, the eccentric semi-ball valve is a commonly used control valve. Its working principle is to control the flow and pressure of fluid by rotating the hemispheric valve core. Its structural characteristics are simple, easy to operate, good sealing, strong corrosion resistance, and long service life. Long, etc., it has a wide range of application fields, mainly used in petroleum, chemical industry, metallurgy, electric power, water treatment and other industries.