Siemens Building Technologies MVF461H Series Data Sheet

Modulating Control Valves

with Magnetic Actuators, Positioning Control and
Position Feedback for Hot Water and Steam

MVF461H Series

MVF461H Series Magnetic Control Valve.

Description

MVF461H Series Modulating Control Valves are control
valves with magnetic actuators, for modulating control of
hot water, high temperature hot water, and steam.

Features

• Fast positioning time (< 2 seconds)

• Selectable valve characteristic: Equal percentage
or linear

• Selectable standard interface: 0/2 to 10 Vdc or 0/4
to 20 mA

• High resolution (>1000:1)

• High rangeability

• Wear-free inductive stroke measurement

• Spring return fails closed when de-energized

• Positioning control and position feedback signal

• Low-friction, heavy-duty and maintenance-free

Applications

The MVF461H... Control Valves are through-port valves
with magnetic actuators. The actuator is equipped with
an electronics module for positioning control and position
feedback. If the power is off, the valve fails closed.

The short positioning time, high resolution and high
rangeability make these valves ideal for proportional
control of district heating stations, and heating applications
using high temperature hot water and steam.

Wiring Diagram

Transformer

Controller

SSEN0346R1

F

G0

G

Y

M

U

G0

G

Y

M

U

Z

System neutral (SN)

System potential (SP)

0 to 10Vdc / 2 to 10Vdc
0 to 20 mA / 4 to 20 mA

Measuring neutral (= G0)

0 to 10Vdc / 2 to 10Vdc
0 to 20 mA / 4 to 20 mA

Override input

AC/DC 24 V Operating voltage

Control signal

Positioning feedback signal

A-225

Valves

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Specications/Sizing

MVF461H Modulating Control Valve Specifications

A-226

Valves

Electrical

Low-voltage Use Only ..........................................Class 2 (SELV, PELV)

24 Vac

Operating Voltage........................................................24 Vac +20/-15%

Frequency ............................................................................ 45 to 65 Hz

Typical Power Consumption ..........................................See SizingTable

Standby .................................................... <1 W (Valve Fully Closed)

Nominal Apparent Power..............................................See Sizing Table

Suitable Fuse ..................................................................................Slow

24 Vdc

Operating Voltage............................................................... 20 to 30 Vdc

Functional Data of Actuator
Input

Positioning Signal Y .....................................0/2 to 10 Vdc, 0/4 to 20mA

Impedance

0/2 to 10 Vdc ..............................................................100 kΩ//5nF

0/4 to 20 mA ................................................................240 Ω//5nF

Forced Control

Impedance ................................................................................ 22 kΩ

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)....................... 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)

Perm. Operating Pressure1 ........................Water up to 248°F (120°C)

232 psig (16 bar)
Water Above 248°F (120°C):
188 psig (13 bar)
Saturated Steam: 130 psig (9 bar)

Pressure Differential ∆ pmax/ ∆ ps ................................ 145 psi (10 bar)

Materials

Body .......................................................................... Nodular Cast Iron

Cover Flange .............................................................. Nodular Cast Iron

Seat/Inner Valve ..............................................................Stainless Steel

Packing

Normal Duty ....................................................................EDPM (O-ring)

Electrical Connections

Cable Entries ...........................................3 x M20 x 1.5 or PG13.5/G1/2

Connection Terminals .............Screw Terminals for up to 12 AWG Wires

(0.75 mm2 Min. Cross-sectional Area3)

Max. Pressure

Max. Differential Pressure .....................................................145 psi

Media Temperature ........................................ 34° to 356°F (1° to 180°C)

Ambient Conditions
Temperature

Operation and Storage ............................. 23° to 113°F (-5° to 45°C)

Transport .............................................. -13° to 158°F (-25° to 70°C)

Humidity ................................................. 5 to 95% rh (Non-condensing)

Resolution ...................................................................................... 1000:1

Position with Actuator De-energized ......................................... Closed

Positioning Time ................................................................... <2 Seconds

Approvals ........................................................................ IP31 to IEC 529

Conforms to CE Requirements, UL 873,
Certied to Canadian Standard C22.2, No. 24, C-Tick N-474,
PED 97/23/EC: Pressure-carrying Parts

Flow Characteristic .................................... Equal Percentage or Linear

Environmental Protection ...................................................NEMA Type 1

Notes:

1

Tested at 1.5 x PN (24 bar), similar to DIN 3230-3

2

Can be selected via DIP switch.

3

In case of strong vibrations, use high-ex stranded wires.

Par. 1, Section. 2.1.4 / Par. 3, Section 3 Fluid Group 2

2

Sizing

Max. Differential

Line Size

Part No.
MVF461H15-0.6 1/2 0.7 145 33 15 3.15 130 215 360
MVF461H15-1.5 1/2 1.8 145 33 15 3.15 130 215 360
MVF461H15-3 1/2 3.5 145 33 15 3.15 130 215 360
MVF461H20-5 3/4 5.9 145 33 15 3.15 130 215 360
MVF461H25-8 1 9.4 145 33 15 3.15 130 215 360
MVF461H32-12 1-1/4 14.0 145 43 20 4 100 165 260
MVF461H40-20 1-1/2 23.3 145 65 20 6.3 100 165 260
MVF461H50-30 2 35.0 145 65 26 6.3 65 100 165

(in.)

Cv

Pressure and

Close-off (psi)

Power for

Transformer

Sizing (VA)

Power

Consumption

(W)

Slow
Fuse

Accessories & Service Kits

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Wire Gauge (AWG)

16 14 12

Max. Wiring Length (ft.)

A-257