Check valve to vertical piping is determined to protect a pump against backslash effects of the operation fluid or when the pump runs idle. Check valve to vertical piping is not functionally framed as a stop valve.
Flanged ball valve is a stop valve for total flow closure or opening of the transported medium. It cannot be used as a throttle-valve or regulating valve. Flanged ball valve is standardly controlled by a hand lever with 90° rotation.