Is the ball valve ball valve?
The hemisphere valve has two kinds, one is no eccentric, the valve seat is always close the valve, the valve must be made (such as the V type ball valve etc.).
Therefore, strictly speaking, eccentric hemisphere valve ball valve, butterfly valve is more like a ball valve.
One is with an eccentric, hemispherical valve most market means. This eccentric semi ball valve disc shaped like a hemisphere valve valve switch trip also is 90 degrees, but the rotation center of the valve (the valve shaft and the valve seat center (body) or line center) with an eccentric, made after the valve opening immediately from the valve seat, the sealing ball valve and the movement principle is not consistent.
