Ball valve partially open
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I’m asking the experts: is the flow rate the same for a regular ball valve when it is half-open and when it is fully open?
It’s definitely different; for ordinary ball valves, it’s best to have them fully open or fully closed, as being partially open puts a lot of stress on the sealing surfaces.
When you get home, turn on your faucet and see what it feels like!
Ball valves are either fully open or fully closed; they are not designed for partial operation. Leaving them in a partially open position for an extended period allows the fluid to erode the sealing surfaces, resulting in internal leaks. When the ball is in a partially open position, pressure builds up, causing the valve seat to deform, which increases the torque and leads to poor sealing or even complete blockage of the valve!
It’s definitely different. Ball valves are usually either fully open or fully closed; leaving them at a half-open position for an extended period of time is certainly not good for the valve, as it can lead to leaks
The flow rate will definitely be different, but it is not recommended to use ball valves for flow control as it is not good for the sealing surfaces.
I agree with the view from the 4th floor: when a ball valve is opened partially or fully, the flow rate changes, just like with a faucet at home. But why open it partially? At low pressure levels, there are no major issues; however, high pressure exerts force on the ball, and over time this will definitely affect the sealing quality.