Floating Ball Valve vs. Trunnion Mounted Ball Valve
Floating Ball Valve
The ball is not fixed and moves toward the downstream seat under pressure.
Simple design
Lower cost
Suitable for small to medium sizes
Common for general applications
Trunnion Mounted Ball Valve
The ball is fixed by a trunnion, while the seats move toward the ball to provide sealing.
Lower operating torque
Suitable for large sizes & high pressure
Better for high differential pressure
Ideal for critical pipeline applications
In simple terms:
Floating = Simple & Economical
Trunnion = Low Torque & Heavy-Duty
The right choice depends on size, pressure class, differential pressure, temperature and application requirements.
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