Fully-Welded Ball Valves: Introduction, Structure, Parameters & Functions

Fully-welded ball valves are a type of ball valve with simple structure and excellent sealing performance. Their main feature is the integration of the valve body and the pipeline, all manufactured using fully-welding technology, with no leakage points and strong corrosion resistance. They are suitable for pipeline systems transporting high-pressure, high-temperature, and corrosive media. The valve core of this type of ball valve adopts a spherical valve core, which can realize quick opening and closing, with light and flexible operation. It is widely used in petroleum, natural gas, chemical industry, electric power, metallurgy and other industries.

Structural Principle

The main components of a fully-welded ball valve include the valve body, valve core, sealing ring, transmission mechanism, etc. The valve core is controlled by the transmission mechanism and closely cooperates with the sealing ring inside the valve body to achieve good sealing performance. The transmission mechanism often adopts manual devices, gear transmission, electric actuators, pneumatic actuators, etc., which have the advantages of simple structure, convenient installation and high reliability. In addition, the valve body material of the integrated fully-welded ball valve is generally high-strength materials such as carbon steel and stainless steel, which have good corrosion resistance and high-temperature resistance, and can adapt to various harsh working environments.

Technical Parameters of Fully-Welded Ball Valves

• Nominal Diameter: DN15-DN600

• Nominal Pressure: 150LB-900LB

• Applicable Temperature: -29℃~+200℃

• Main Material: Carbon Steel, Stainless Steel

• Sealing Material: Polytetrafluoroethylene, Flexible Graphite, Stainless Steel

• Drive Method: Manual, Electric, Pneumatic

• Connection Method: Welding

• Executive Standards: GB/T12237-2007, API608, ASME B16.34, ISO 5211

Functions of Fully-Welded Ball Valves

Fully-welded ball valves are ball valves used to control fluid media, usually for the control of high-pressure, high-temperature or strongly corrosive media. Their main function is to open, close or adjust the fluid media in the pipeline to meet the requirements of the process flow. Due to their fully-welded design, they can ensure their stability and sealing performance in high-pressure, high-temperature or strongly corrosive environments, and are widely used in pipeline systems in petroleum, chemical industry, natural gas and other industries.