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Technical Instructions
Document Number 125-4461
May 3, 2006
Product
Number
MXG461B15-0.6
MXG461B15-1.5
MXG461B15-3
MXG461B20-5
MXG461B25-8
MXG461B32-12
MXG461B40-20
MXG461B50-30
Ordering
Accessories
Technical/
Mechanical Design
Automatic Control
Page 2
Line Size
Cv
(in)
1/2
0.7
1/2
1.8
1/2
3.5
3/4
5.8
1
9.3
1-1/4
14
1-1/2
23
2
35
Key:
Δp v max = Maximum permissible differential pressure across the valve's control path,
valid for the entire actuating range of the motorized valve (maximum
recommended operating differential pressure).
Δp s
= Maximum permissible differential pressure at which the motorized valve will
close securely against the pressure (close-off pressure).
S
= Nominal apparent power for selecting the transformer.
NA
Pmed
= Average true power.
I
= Slow fuse (mandatory).
N
Cv
= Nominal flow rate of cold water [41°F to 86°F (5°C to 30°C)].
L
= Maximum cable length. With four-wire connections the maximum
permissible length of the separate 14 AWG Cu signal cable is 656 feet
(200 m).
•
The valve body and magnetic actuator assemblies cannot be separated.
•
The brass/bronze fittings are included.
•
The Z366 stem heater must be ordered separately.
•
When placing an order, specify the quantity, product number and description.
Example:
1 MXG461B15-0.6 valve
Z366
Stem heater for 24 Vac/10W.
Required for medium temperatures
<32°F (0°C).
ASE12 Replacement Circuit Board
The electronics module converts the positioning signal to a phase-cut power signal,
which generates a magnetic field in the coil. This causes the armature to change its
position according to the interacting forces (magnetic field, counterspring, hydraulics,
etc.). The armature responds rapidly to any change in signal, transferring the
corresponding movement directly to the valve plug. This enables fast changes in load to
be corrected quickly and accurately.
The valve's position is measured continuously. Any disturbance in the system is rapidly
corrected by the internal positioning controller, which ensures that the positioning signal
and the valve stroke are exactly proportional, and also delivers the position feedback
signal.
Table 1. Product Numbers.
Δp s
Δp v max
S
NA
(psi)
(psi)
(VA)
145
70
33
145
70
33
145
70
33
116
70
33
102
40
33
87
40
43
87
40
43
87
40
65
and
1 Z366 stem heater
MXG461 Series Modulating Control Valve
with Magnetic Actuator
Wire Gauge (AWG)
Pmed
I
16
N
(W)
Fuse
15
3.15
130
15
3.15
130
15
3.15
130
15
3.15
130
15
3.15
130
20
4
100
20
4
100
22
6.3
65
Figure 1.
Siemens Building Technologies, Inc.
14
12
L (ft)
215
360
215
360
215
360
215
360
215
360
165
260
165
260
100
185
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