The fully welded ball valve is an integrated fluid control device manufactured with welding technology as the core. Its core feature is that all parts are connected by welding, without thread or flange structure, to avoid the risk of external leakage. Its valve body adopts an integral welded structure, relying on the ball to rotate 90 degrees to achieve the opening and closing control of the pipeline medium, and the sealing performance depends on special materials and structural design.
1. Structure and design
Connection method
The main body adopts an integrated welding design, and some models support flange or threaded connection. The nominal diameter covers DN10 to DN1200 to meet the requirements of different pipeline specifications.
Key components
Includes standardized components such as welded ball, preloaded seat spring, self-rescue valve seat, etc. The valve seat mostly uses a combination of PTFE (polytetrafluoroethylene) sealing ring and spring to ensure the sealing stability under pressure fluctuations.
Material selection
The valve body can be selected from carbon steel or stainless steel forgings, and the sealing materials include PTFE, metal seals and nitrile rubber, etc., to meet the extreme temperature environment of -29℃ to 550℃.
2. Performance Advantages
Reliability
The overall welded structure eliminates the risk of leakage, and the disc spring compensation design adapts to pressure and temperature changes. The working pressure range is 1.6MPa to 42MPa.
Applicability
Supports manual, worm gear, pneumatic and electric drive modes. The diffused model integrates a detection unit, which is suitable for gas, heating pipelines and other scenes that require regular inspection.
Low maintenance cost
Precision machining and corrosion-resistant materials reduce wear, and the valve stem surface treatment process extends service life and reduces the frequency of operation and maintenance.
3. Typical applications
Mainly used in urban gas transportation, centralized heating systems, petrochemicals and steel industries, especially for buried pipelines or space-constrained working conditions.
