An underground full-welded ball valve is a pipeline control device featuring a full-welded structure, suitable for underground pipeline systems, with features such as no external leakage risk and strong corrosion resistance.

Structural Features

The valve body and pipe are welded together, with the entire structure featuring no threaded or flanged connections, achieving sealing through a full-welding process. The main materials include carbon steel (such as ASTM A106-B) and stainless steel (such as 304/316). The ball and valve seat are equipped with PTFE sealing rings and spring design to ensure long-term sealing performance.

Job Characteristics

Operating pressure range covers PN16-40 MPa, with working temperatures from -29℃ to 200℃. Supports manual, pneumatic, and electric drive modes. The sealing design features a double piston effect system, with the valve stem equipped with a full fluorine rubber sealing ring to achieve leakproof performance.

Application Scenario

Primarily used in urban gas, heating networks, petrochemical industries, etc., these can be buried underground to save space. Compared to traditional valves, they don't require valve wells and come with a 20-year warranty, making installation more convenient.