Plug valves and ball valves are different kinds of valves, the main differences are as follows:
First, the structure is different:
The spool of plug valve is cylindrical and can be rotated to control the flow, while the spool of ball valve is spherical and the flow is controlled by rotating the sphere.
Second, the operating torque is different:
Under the same calibre, the operating torque of the plug valve is larger than that of the ball valve, because the spool of the plug valve needs to move in the pipeline, while the spool of the ball valve only needs to rotate in the axial direction.
Third, the sealing effect is different:
Ball valves have good sealing performance, because the sealing surface of the ball can be completely affixed with the valve seat. The plug valve sealing effect by the spool and seat clearance.
Fourth, the applicable occasions are different:
Plug valve is suitable for high temperature and high pressure, high viscosity media control, while the ball valve is widely used in urban water supply, petroleum, chemical and other industries.
Therefore, in the selection of different occasions, media and working conditions and other conditions need to be considered comprehensively, choose the right valve.
