Selection Principles and Instructions for Selection of Disc Type Ball Valves

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Selection Principles and Instructions for Selection of Disc Type Ball Valves

The working principle of the disc type ball valve is that the valve is unblocked and blocked when the ball is rotated. The ball valve switch is lightweight, small in size, can be made into a large diameter, reliable in sealing, simple in structure, and convenient in maintenance. The sealing surface and spherical surface are often in a closed state, which is not easy to be eroded by the medium, and is widely used in various industries.

1. The main pipeline for oil and natural gas transportation needs to clean the pipeline. If it needs to be buried underground, use a full-diameter, fully welded ball valve; if it is buried on the ground, choose a right-diameter welded ball to connect the flanged ball ; Branch pipe, select flange connection, welding connection, full diameter or reduced diameter ball valve.

2. For the pipeline and storage equipment of product oil, the flanged ball valve is used.

3. On city gas and natural gas pipelines, use floating ball valves with flange connection and internal thread connection.

4. In the oxygen pipeline system in the metallurgical system, it is advisable to choose a fixed ball valve that is strictly degreased and flanged.

5. For piping systems and devices of low-temperature media, low-temperature ball valves with bonnets should be used.

6. On the pipeline system of the catalytic cracking unit of the oil refining unit, a lifting rod type ball valve can be selected.

7. In the equipment and pipeline system of acidic and alkaline corrosive media in chemical system, it is better to choose austenitic stainless steel, all-stainless steel ball valve with PTFE seat ring.

8. Metal-to-metal sealed ball valves can be used on the piping systems or devices of high-temperature media in metallurgical systems, power systems, petrochemical plants, and urban heating systems.

9. When the flow adjustment is required, a worm gear driven, pneumatic or electric regulating ball valve with V-shaped opening can be selected.

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