Why is one end of the discharge valve larger and the other smaller?
Thread Content
For example, the upper discharge valve, the lower discharge valve, and the discharge ball valve all have a larger diameter at one end and a smaller diameter at the other.
It is precisely because the process requirements dictate that the size at the downstream outlet must be maintained, and the valves you mentioned all have a reduced diameter, that in order to ensure the desired size at the downstream end, it is necessary to make the inlet larger.
The inlet side of the discharge valve is equipped with a valve seat. Although the flange has a large diameter, the inner diameter of the valve seat is quite small; to ensure an adequate flow rate, a larger diameter is chosen for the inlet. However, in recent years I have also encountered clients who requested that the flanges on both ends be of the same size.
You are referring to the reduced-bore ball valve, from 125 to 100