Series C/D China Eccentric Rotary Plug Control Valve

https://www.utmostvalve.com/products/eccentric-rotary-plug-control-valve/

The rotary valve working principle is a fan-shaped ball valve with eccentric rotation. The eccentric ball core of eccentric rotary plug control valve is tangent to the valve seat, and when it is opened, the spool is separated from the valve seat. When closed, the spool gradually confects the seat of valve, so that the ball exerts a pressing force on the valve seat. The eccentric rotary valve has a simple flow path and low resistance.