Nilfisk-ALTO POSEIDON 4 Series, Service Manual, Page: 15 / 37

D
15 SM_POSEIDON 4_en_Ver.1.0_08.2012
Function
Fig.D.4: Valve block 1 ~ - Cut Away View
The schematic drawing of the pump head in (Fig.D.3) is made to get a better understanding
of the function.
NOTE ! In Fig,D.3 the pump head is shown with a two-way easy start valve, which is the
layout for all the single phase machines, whereas the three phase machines are without the
valve.
Fig.D.3: Schematic Drawing Pump Head
Pressure outlet
Non-return valve
Dertergent valve
Piston
Easy start valve
End switch
Inlet
Pressure reg. valve
Control piston
Valve pressure
Valve suction
Principal drawing
Pressure reg. valve
Dertergent valve
Pressure outlet
Inlet
Control piston
End switch
Easy start valve