Centrifugal Pumps - A Deep Study (Part 3)

End suction Centrifugal and Split Case Piping
Suction Conditions
End suction and split case pumps can be installed in suction lift or suction headache conditions. The piping system associated with the pump varies slightly depending on the suction conditions. Since the suction lift condition is the most difficult, it is used in the following description.
Suction Piping
Most pumps in a suction lift condition require a foot valve on the end of the suction line to prevent the pump from losing prime. Most foot valves are large globe valves. The suction piping is usually designed one pipe size larger than the inlet of the pump with smooth piping material and fittings. Isolation valves on the suction side of a pump should only be gate or ball valves. Butterfly valves cause high headloss. As the piping reaches the pump, it is reduced to meet the pump connection using an eccentric reducer. The eccentric reducer prevents air accumulation in the piping.
Discharge Piping The discharge side of a p…
Discharge Piping The discharge side of a p…