AWG | Fittings | Inductors FD Z2 and Z4
Permanent installation
We recommend installing a DN20 stop valve between the foam agent
container and the adapter of the suction device.
Mounting holes: 2 x Ø 11 mm, clearance 74 mm (Fig. 2/2).
We recommend installing a straight pipe section of at least approx. 30 cm
directly after the inductor
Pressure loss in the inductor
The suction capability of the inductors is fundamentally based on a con-
siderable pressure loss.
This pressure loss in the inductor depends on the counter pressure at the
inductor outlet and is calculated as the hose friction plus the difference in
height between the inductor and the foam nozzle.
At an optimal counter pressure of approx. 2 to 3 bar max., the pressure
loss amounts to approx. 45 % to 50 % depending on the chosen suction
rate. If the counter pressure is higher, the pressure loss in the inductor
decreases to approx. 30 % to 35 %.
Inductor inlet pressure
Recommended pressure range
Low expansion foam nozzleý
Medium expansion foam nozzle
The values given here serve as a guide. The pressure ratio between the
inductor inlet and outlet varies depending on the chosen suction rate, the
foam pipes used and other external influencing factors (hose friction, hose
length, difference in height).
Suction height of the foam agent
If the suction height of the foam agent is greater than approx. 2 m, the
rates set at the metering valve are sometimes significantly undercut. This
applies in particular to rates above 3 %.
M1008B10 | Rev. 03-08/24
Use of foam nozzles in heights up to approx . 30 mý
At high inlet pressures of approx. 12 to 16 bar, the inductor
is capable of aspirating even with height differences of up
to 30 m.
Inductor inlet
8 bar – 9.5 bar
6 bar – 7 bar
uSE
Inductor outlet
5 bar – 6 bar
3 bar – 4 bar
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