type, to prevent loss of water back through open valves when not running. a relief valve is necessary in the system if the pumps are capable of raising the pipeline pressure so that it is greater than the design figure. with centrifugal pumps the relief valve is unlikely to be needed but it is essential...
type, to prevent loss of water back through open valves when not running. a relief valve is necessary in the system if the pumps are capable of raising the pipeline pressure so that it is greater than the design figure. with centrifugal pumps the relief valve is unlikely to be needed but it is essential...