Construction of welded ball valve

In a solid steel body, a polished stainless steel ball with a hole is mounted on a vertical stem. In the open position, the hole in the ball aligns with the pipeline, and in the closed position, the axes of the hole and the pipeline are perpendicular.

Sealing between the valve body and the ball is ensured by a PTFE seal pressed against the ball by a ring spring.

For stem sealing, several consecutive gaskets made of rubber, PTFE, or FPM (fluoroelastomer) are installed.

The solid valve design is highly reliable and does not require maintenance during operation, but it is not repairable and must be replaced in case of failure.

Steel welded ball valves are less material-intensive and usually cheaper than flanged ones. They are used in critical pipeline sections and hard-to-reach places. It is recommended to install them in external heating networks, boiler rooms, and heat stations.

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