Product Overview

Type summary
Type reference DN k
vs
Δp
max
S
NA
P
med
AB → A AB → A
[m
3
/h] [MPa] [bar] [VA] [W]
M3FB15LX06/A
15 0.6 2.2 22 26 6
M3FB15LX15/A
15 1.5 2.2 22 26 6
M3FB15LX/A
15 3.0 2.2 22 26 6
M3FB20LX/A
20 5.0 1.8 18 26 6
M3FB25LX/A
25 8.0 1.2 12 40 10
M3FB32LX
32 12.0 0.8 8 40 10
Δp
max
= Maximum permissible differential pressure across the valve’s control path AB → A valid for
the entire actuating range
S
NA
= Rated apparent power for transformer selection
P
med
= Typical power consumption
k
vs
= Nominal flow rate of cold water through the fully opened valve (H
100
) by a differential pressure
of 100 kPa (1 bar), to VDI 2173
Type
reference
Operating voltage Positioning
signal
Working range Data
sheet
ZM101/A
AC 24 V DC 0…10 V DC 4…8 V
ZM121/A
AC 24 V DC 4…20 mA DC 8…16 mA
ZM111
- DC 0…20 V Phs DC 10…15 V Phs
N4591
Acc
essories:
ZM.. terminal housing
For ZM101/A and ZM121/A the DC 0…20 V Phs positioning signal without
operating voltage is also possible.
Valve body and magnetic actuator form one integral unit and cannot be separated.
Ordering
When placing an order, please specify the quantity, product description and type
code.
Type reference Stock number Description Quantity
M3FB20LX/A M3FB20LX/A Modulating refrigerant valve with magnetic actuator 2
ZM101/A ZM101/A Terminal housing 2
Example:
Valves and terminal housings are packed separately.
Delivery
Rev
. no. Overview tabl
e, see page 9.
Technic
al design
The armature or magnetic core is designed as a floating component within the
pressure system, so that no external shaft gland is required. The leakage losses
common with moving parts are thus avoided. The valve cross-section allows for
easy flow whether the valve is fully or only partially opened. This reduces pressure
losses and ensures quiet operation.
The control signal is converted in the ZM../A terminal housing into a phase cut
signal, which generates a magnetic field in the coil. This causes the only moving
part, the armature, to change its position in accordance with the interacting forces
(magnetic field, counter-spring, hydraulics). The armature responds rapidly to any
change in signal, transferring the corresponding movement directly to the control
disc, enabling fast changes in load to be corrected quickly and accurately.
The force of the counter-spring closes the valve automatically (control path ports
AB  A) if the power is switched off or fails.
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Siemens Modulating refrigerant valves with magnetic actuator‚ PS43 CE2N4721en
Building Technologies 03.05..2011