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The difference between trunnion ball valve and floating ball valve
Feb 06, 2018

Trunnion and Floating is in accordance with the opening and closing parts of the form of displacement points.In the sealing process:

Trunnion ball valve is the ball does not move, by the media pressure to push the seat on the ball pressure on the seal, the sealing effect is reflected in the import side;

Floating ball valve is the valve seat does not move, by the media pressure to push the ball on the valve seat seal, the sealing effect is reflected in the outlet.

Selection principle:

1. According to the size of the operating force, generally the same diameter and pressure level of the ball valve, the floating torque than the trunnion torque, so the general small diameter, low pressure ball valve choice of floating ball valve, large diameter and high pressure valve selection trunnion ball valve;

2. Flammable and explosive gases generally use trunnion, such as natural gas line.

3. The same diameter and pressure of the ball valve,Floating ball valve is cheaper than Trunnion valve.