Product Overview
MVF461H Series Modulating Control Valve Technical Instructions
with Magnetic Actuator Document Number 125-4361
June 17, 2008
Siemens Building Technologies, Inc. Page 7
Specifications,
Continued
Functional data of actuator
Input
Positioning signal Y 0/2 to 10 Vdc, 0/4 to 20 mA,
or 0 to 20 Vdc Phs
Impedance 0/2 to 10 Vdc 100K ohm//5nF
0/4 to 20 mA 240 ohm//5nF
Forced control
Impedance 22K ohm
Closing the valve (Z connected to G0) <1 Vac; <0.8 Vdc
Opening the valve (Z connected to G0) >6 Vac; >5 Vdc
No function (Z not wired) Phase-cut or positioning signal Y
active
Output
Position feedback signal voltage 0/2 to 10 Vdc; load resistance > 500Ω
current 0/4 to 20 mA; load resistance <
500Ω
Stroke measurement Inductive
Nonlinearity +
3% of end value
Functional data of valve Nominal pressure ANSI 125 (PN 16)
Permissible Operating pressure
1)
Water up to 248°F (120°C): 232 psi (16 bar)
Water above 248°F (120°C): 188 psi (13 bar)
Saturated steam: 130 psi (9 bar)
Pressure differential Δp
max/Δp
s
145 psi (10 bar)
Leakage at Δp = 0.1 MPa (1 bar) A → AB Maximum 0.05% C
V
Media temperature 34°F to 356°F (>1°C to 180°C)
Valve characteristic
2)
Equal percentage or linear, optimized
near the closing point
Resolution ΔH/H100 1:1000 (H = Stroke)
Type of operation Modulating
Position when de-energized A → AB closed
Orientation: Upright to horizontal
Positioning time < 2 seconds
Materials Valve body Modular cast iron
Cover flange Modular cast iron
Seat/Inner valve Stainless Steel
Valve stem seal EPDM (O-ring)
Electrical connections Cable entries 3 × M20 × 1.5 or PG13.5/G1/2
Connection terminals Screw terminals for up to 12 AWG
wires
Min. cross-sectional area
3)
0.75 mm
2
Max. cable length See Table 1
Ambient conditions Temperature
Operation
and storage 23°F to 113°F (-5°C to 45°C)
Transport -13°F to 158°F (-25°C to 70°C)
Humidity 5 to 95% rh (non-condensing)
1. Tested at 1.5 × PN (24 bar), similar to DIN 3230-3.
2. Can be selected via DIP switch.
3. In case of strong vibrations, use high-flex stranded wires.