Data Sheet for Product

ManualsBrandsSiemens ManualsControl ValvesMXG461B 2" Modulating Control Valve w/ Magnetic Actuator (35.1 Cv)

CE2N4461en

2018-02-05

Building Technologies

461

Modulating control valves

with magnetic actuators,

PN 16

MXG461B..

for drinking water, cold water and hot water systems,

DVGW approved

∂ Short positioning time (< 2 s), high resolution (1 : 1000)

∂ Selectable valve characteristic: equal-percentage or linear

∂ High rangeability

∂ Operating voltage AC / DC 24 V

∂ Selectable standard signal inputs DC 0/2...10 V or DC 0/4...20 mA

∂ DC 0…20 V Phs phase-cut signal input for Staefa controllers

∂ Indication of operating state, visible from the outside

∂ Accurate position feedback signal by inductive stroke measurement

∂ Spring return facility: A ↑ AB closed when deenergized

∂ Low friction, robust and maintenance-free

∂ Including fittings

Use

The MXG461B.. valves are mixing or 2-port valves. They are supplied with the

magnetic actuator ready fitted, equipped with an electronics module for position control

and feedback. They are DVGW approved for drinking water applications.

When deenergized, the valve’s control path A ↑ AB is closed.

The short positioning time, high resolution and high rangeability make these valves

ideal for modulating control of domestic water (mains water and water in open circuits),

hot and cold water systems.

Summary of content (14 pages)

PAGE 1
4 461 Modulating control valves MXG461B.. with magnetic actuators, PN 16 for drinking water, cold water and hot water systems, DVGW approved ∂ ∂ ∂ ∂ ∂ ∂ ∂ ∂ ∂ ∂ ∂ Short positioning time (< 2 s), high resolution (1 : 1000) Selectable valve characteristic: equal-percentage or linear High rangeability Operating voltage AC / DC 24 V Selectable standard signal inputs DC 0/2...10 V or DC 0/4...
PAGE 2
Type summary Type reference DN kVS 3 [m /h] ΧpS [kPa] [kPa] 1000 1000 Operating voltage Spring return Positioning signal time DC 0…10 V or DC 2…10 V or DC 0…20 mA or DC 4...20 mA <2s 0,6 MXG461B15-0.6 MXG461B15-1.5 Χpmax 15 1,5 3 MXG461B15-3 MXG461B20-5 20 5 800 800 MXG461B25-8 25 8 700 700 MXG461B32-12 32 12 MXG461B40-20 40 20 600 600 MXG461B50-30 50 30 AC /24 V DC 20…30 V  Χpmax = max.
PAGE 3
Spring return facility If the positioning signal is interrupted, or in the event of a power failure, the valve’s return spring will automatically close control path A ↑ AB.
PAGE 4
ON OFF Selection positioning range Y and U: 0...10 V / 0…20 mA or 2...10 V / 4...20 mA 0...10 V 2...10 V 0...20 mA 4...20 mA U Selection valve characteristics Equal-percentage or linear ON OFF ON ON OFF OFF Ri > 500 ς 0...10 V 2...10 V Ri < 500 ς 0...20 mA 4...20 mA ON Ri > 500 ς, ⇓ voltage signal Ri < 500 ς, ⇓ current signal ON OFF . V Output signal U (position feedback signal) is dependent on the load resistance Ri. 4461Z23 ON OFF ON OFF 4461Z22 Y OFF .
PAGE 5
Calibration If the electronics module is replaced or the actuator turned through 180 °, the valve’s electronics must be recalibrated. For that, the hand wheel must be set to Auto. 01124 The printed circuit board has a slot (position 3, preceding page). Calibration is made by bridging the contacts located behind the slot using a screwdriver. The valve will then travel across the full stroke to store the end positions.
PAGE 6
Equal percentage Linear Volumetric flow Volumetric flow [%] 4461D02 [%] 100 100 80 80 60 60 40 40 20 20 0 4461D03 Valve characteristic 0 0 2 4 6 2 6 4 12 8 10 [V] 0 10 [V] 2 2 4 6 20 [mA] 4 12 Positioning signals Connection type 1) 8 10 [V] 10 [V] 20 [mA] Positioning signals The 4-wire connection should always be given preference! Type reference 4-wire connection 6 SNA PMED STR PTR IF Wire corss-section [mm2] [VA] [W] [VA] [W] [A] 1,5 2,5 4,0 max.
PAGE 7
The MXG461B.. valves are supplied as three-port valves, but can also be used as throughport valves: In that case, close off port “B“ with the accessories provided (nut, cover and gasket). A AB B 4461Z15 When used as a throughport valve Installation notes ∂ The MXG461B.. valves are flat-faced allowing sealing with the gaskets provided ∂ Do not use hemp for sealing the valve body threads ∂ The actuator may not be lagged For electrical installation, refer to «Connection diagrams».
PAGE 8
Technical data Functional actuator data Extra low-voltage only (SELV, PELV) Power supply AC 24 V Operating voltage AC 24 V °20% (SELV) or AC 24 V class 2 (US) Frequency 45...65 Hz Typical power consumption Pmed refer to table «Connection type», page 6 Standby < 1 W (valve closed) Rated apparent power SNA refer to table «Connection type», page 6 Required fuse IF slow, refer to table «Connection type» External supply line protection Fuse slow max. 10 A or Circuit breaker max.
PAGE 9
Functional valve data PN class Permissible operating pressure1) Differential pressure Χpmax / ΧpS Leakage rate at Χp = 0,1 MPa (1 bar) Valve characteristic 3) Permissible media Materials Dimensions / weight Pipe connections Standards, directives and approvals Medium temperature 2) Stroke resolution ΧH / H100 Position when deenergized Mounting position Mode of operation Valve body, covering flange Seat / plug Valve stem seal Dimensions Weight Fittings EElectromagnetic compatibility (Application) Produc
PAGE 10
General environmental conditions Operation IEC 60721-3-3 Transport IEC 60721-3-2 Storage IEC 60721-3-1 Climatic conditions Temperature Class 3K5 –5...+45 °C Class 2K3 –25...+70 °C Class 1K3 –5...+45 °C Humidity 5...95 % r.h. 5...95 % r.h. 5...95 % r.h.
PAGE 11
Connection diagrams Caution If controller and valve receive their power from separate sources, only one transformer may be earthed on the secondary side. Caution In case of DC power supply, a 4-wire connection is mandatory! Terminal assignment for controller with 4-wire connection (to be preferred!). DC 0...10 V DC 2...10 V DC 0...20 mA DC 4...20 mA Common Transformer Separate Transformer – – G G G U U Terminal assignment for controller with 3-wire connection DC 0...10 V DC 2...10 V DC 0...
PAGE 12
Controllers with phase-cut DC 0...20 V Phs Common Transformer Separate Transformer – G – G G U U Stem heating element Z366 2 AC / DC 24 V power supply for heating element 4 Power supply, positioning signals Application examples AB AB B B A A A B A 4461Z17 The examples shown below are basic diagrams with no installation-specific details. 10 x DN [min. 0.
PAGE 13
Dimensions Externally threaded G...B to ISO 228-1 Internally threaded Rp... to ISO 7-1 Fittings to ISO 49 / DIN 2950 (supplied complete with flange gaskets) Type reference * DN G [Inch] Rp [Inch] L1 [mm] L2 [mm] L3 * [mm] H [mm] E [mm] F [mm] MXG461B15-0.6 15 G1B Rp ½ 80 42,5 50 340 80 115 7,1 MXG461B15-1.
PAGE 14
Revision numbers Type reference Valid from rev. No. MXG461B15-0.6 ..D MXG461B15-1.5 ..D MXG461B15-3 ..D MXG461B20-5 ..C MXG461B25-8 ..C MXG461B32-12 ..C MXG461B40-20 ..C MXG461B50-30 ..C Issued by Siemens Switzerland Ltd Building Technologies Division International Headquarters Gubelstrasse 22 6301 Zug Switzerland Tel. +41 58-724 24 24 www.siemens.com/buildingtechnologies © Siemens Switzerland Ltd, 2010 Technical specifications and availability subject to change without notice.