Incorrect installation if the valve is oversize, this can lead to chattering and eventual failure. If It is far from suited to the applying which is gradual to shut each time, this tends to bring about some backflow leakage, which often can problems your pump as well as the valve. https://brassneedlevalve95062.ziblogs.com/30812639/how-much-you-need-to-expect-you-ll-pay-for-a-good-brass-ball-valves