Description: Power requirement of the pump at the flow rate at the point of best efficiency; Name: pump power input (optimum)
Description: pump power input at the rate of flow corresponding to the best efficiency; Name: optimum pump power input
Description: a specific design within the context of a type, which is generally characterized by its dimensions. A construction can comprise several design (variants), which generally vary in terms of mechanical details; Name: Construction form of the seal surface, connection, muff A1