What does ball valve mean in practice?
Turning the ball a quarter turn quickly opens or closes the full pipe bore, making it easy to isolate equipment for servicing.
When does it matter?
It is not intended for precise flow regulation, and lack of movement for many years may cause the stem to stick or leak.
Which solutions are related to it?
The pressure, material and full bore are selected, installed without stress and the valve is periodically fully moved.