Data Sheet for Product

Technical Instructions MVF461H Series Modulating Control Valve
Document Number 125-4361 with Magnetic Actuator
June 17, 2008
Page 2 Siemens Building Technologies, Inc.
Table 1. Product Numbers.
Wire Gauge (AWG)
Line Size Cv
Δp
s
Δp
v
max
S
NA
Pmed I
N
16 14 12
Product
Number
(in) (psi) (psi) (VA) (W) Fuse L (ft)
MVF461H15-0.6 1/2 0.7 145 145 33 15 3.15 130 215 360
MVF461H15-1.5 1/2 1.8 145 145 33 15 3.15 130 215 360
MVF461H15-3 1/2 3.5 145 145 33 15 3.15 130 215 360
MVF461H20-5 3/4 5.9 145 145 33 15 3.15 130 215 360
MVF461H25-8 1 9.4 145 145 33 15 3.15 130 215 360
MVF461H32-12 1-1/4 14.0 145 145 43 20 4 100 165 260
MVF461H40-20 1-1/2 23.3 145 145 65 20 6.3 100 165 260
MVF461H50-30 2 35.0 145 145 65 26 6.3 65 100 165
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
NA
= Nominal apparent power for selecting the transformer.
Pmed = Average true power.
I
N
= Slow fuse (mandatory).
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).
Ordering
The valve body and magnetic actuator assemblies cannot be separated. The
assemblies can also be ordered with NPT flanges or weld flanges. To order with NPT
flanges, add an “-N” suffix to the part number. To order with Weld Flanges, add a “-W”
suffix to the part number. When placing an order, specify the quantity, product number
and description.
Examples: (without flanges) 1 MVF461H15-0.6 valve
(with NPT flanges) 1 MVF461H15-0.6-N valve with NPT flanges
(with weld flanges) 1 MVF461H15-0.6-W valve with weld flanges
Accessory
ASE12 Replacement Circuit Board
Technical/
Mechanical Design
Automatic Control
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.