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The most common design is the “floating ball design”. The ball is suspended in the media and held in place by two sealing rings. Some high-quality valves . The ball is supported at the top and bottom to reduce the load on the valve seats.
- Floating: The majority of ball valves have a floating ball. The ball is supported by the valve seats.
- Trunnion: Valves with large diameters and high operating pressures (for example DN >100mm and 30 bar) have often a trunnion design. The ball is supported on the bottom and top to reduce the load on the seat rings. The operating torque is generally lower for trunnion valves.
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