In 2018, Copenhagen Pump was contacted by a service partner to replace 1 of 3 existing IMO Pumps. In connection with the tender, the Port of Aarhus mentioned a number of perceived challenges, which we later found at Site visit were pressure shock-related.
In consultation with the parties, it was decided to install an external bypass valve which immediately proved to solve problems around pressure surges at start-up and during shutdown. The IMO ACF pump has a built-in bypass valve / safety valve whose primary function is to protect the pump. The internal valve can function as a working valve, but this is due to increased and unnecessary wear of wearing parts in the pump. An ACF pump is also a fairly large and heavy pump. It therefore makes very good sense to install an external bypass valve in situations like this, where the pump is used to connect external piping systems, in this case tankers and ships where you can not control the receiver's system operation.
The transition from generation 2 to generation 5 was otherwise quite painless as the two generations externally are mutually goal-oriented.
Replacement af Imo ACF 125N5 IVBP IMO PUMP UNIT
Commissioning, plant analysis, additional change
Fluid: Fuel Oil
Capacitet: 100 m3/h
Pressure adjuastable up to 16 bar