Type Key; Model Type; Pump Heads In Twin-Head Pumps - Grundfos MAGNA3 Manual

1

Type key

Code Example
Type range
MAGNA3
Single-head pump
D Twin-head pump
Nominal diameter (DN) of inlet and outlet ports [mm]
Maximum head [dm]
Pipe connection
F Flange
Pump housing material
Cast iron
N Stainless steel
Port-to-port length [mm]

Model type

This data booklet covers MAGNA3 from model D. The
model version is stated on the nameplate. See fig. 1.
Model type on pump nameplate
Fig. 1
4
MAGNA3 (D) 80 -120

Pump heads in twin-head pumps

The twin-head pump housing has a flap valve on the
outlet side. The flap valve seals off the port of the idle
pump housing to prevent the pumped liquid from
running back to the inlet side. See fig. 2. Due to the
flap valve, there is a difference in the hydraulics
between the two heads. See fig. 3.
Twin-head pump housing with flap valve
Fig. 2
Right pump head
H
Hydraulic difference between the two heads
Fig. 3
MAGNA3
(F) (N) 360
Left pump head
Q