M2H..FY..N Modulating control valve PN16 with magnetic actuator ...

4 348
Modulating control valve PN16
with magnetic actuator
for HTHW and steam,
with positioning control and position feedback
M2H...FY...N
Control valve with magnetic actuator for modulating control in district heating
systems and HTHW and steam applications
• Fast positioning time (< 1 s)
• High resolution (> 1 : 1000)
• High rangeability
• Closed when de-energised
• With positioning control and position feedback
• Low friction, robust and maintenance-free
Use
The M2H...FY...N valve types are through-port control valves with a fixed magnetic
actuator. The actuator is equipped with connecting electronics for positioning control
and position feedback. At zero current the valves are closed.
The short positioning time, high resolution and high rangeability make these valves ideal
for proportional control of district heating stations and heating plant using HTHW and
steam.
The low-friction, robust and maintenance-free construction makes regular service
unnecessary.
Type summary
Operating data
q [mm 2 ]
DN kvs PN Pmed 1.5 2.5 4.0
Valve type [mm] [m 3 /h] [VA] [VA] L [m]
M2H15FY06N 15 0.6 20 5 40 65 110
M2H15FY15N 15 1.5 20 5 40 65 110
M2H15FYN 15 3.0 20 5 40 65 110
M2H20FYN 20 5.0 20 5 40 65 110
M2H25FYN 25 8.0 20 5 40 65 110
M2H32FYN 32 12 26 6 30 50 80
M2H40FYN 40 20 40 10 20 30 50
M2H50FYN 50 30 40 10 20 30 50
Legend see page 2
Siemens Building Technologies CA1N4348E / 11.1998
Landis & Staefa Division 1/6

Legend :
PN = Nominal power
Pmed = Mean operating power
kvs = Flow rate to VDI/VDE2173, tolerance ±10 %
q = Cross section of AC 24 V or DC 20 V cable (Cu)
L = Max. cable length. With 4-wire connections, the maximum length of a separate 1.5 mm 2 Cu
control signal cable may be extended to 200 m.
Ordering
The valves are supplied complete with the magnetic actuator and the terminal housing.
The Z200/... damping device can be ordered on request: see 'Accessories'.
When placing an order, please specify the quantity, product description and type code.
Example:
1 control valve M2H25FYN and 1 damping device Z200/32
Technical /
Mechanical design
The control signal is converted in the terminal housing into a phase cut signal which
generates a magnetic field in the coil. This causes the only moving part, the armature, to
change its position in accordance with the interacting forces (magnetic field, counterspring,
hydraulics etc.). The armature responds rapidly to any change in signal, transferring
the corresponding movement directly to the control disc, enabling fast changes in
load to be corrected quickly and accurately.
The valve position is measured continuously. Any disturbance in the system is rapidly
corrected by the internal positioning controller, which ensures that the control signal and
the valve stroke are exactly proportional, and also provides a feedback signal indicating
the valve position.
Stroke [%]
100
94.0004
80
60
40
20
0
0 2
4
6
8
10
Control signal [V]
If the power is switched off or fails, the valve is automatically closed by the force of the
spring.
The valve stem is sealed with a maintenance-free O-ring gland.
See sheet 4028 for a detailed description of operation.
Manual adjustment
Accessories
The control path can be opened mechanically to between 0 and approximately 90 %, by
turning the handwheel clockwise. The manual adjustment facility can also be used as a
mechanical method of low limit control, i.e. the valve will exercise its normal control
function between the manually-set position and the 100 % open position. For full-stroke
automatic control, the handwheel must be set to 0 (the anticlockwise end-stop).
Z200/... Damping device to extend the closing time from

Sizing
Water flow chart
Flow / pressure differential relationship.
kvs signifies the volume of water V in m 3 /h, which flows through the open valve at a
pressure differential ∆pv of 100 kPa (1 bar).
See sheet 4023 for notes on calculating the value of kvs.
[m 3 /h]
.
V
9I666E
[l / s]
100
70
50
40
30
20
10
7
5
4
3
2
1
0,7
0,5
0,4
0,3
0,2
M2H..FY..N
VS
DN50 k 30
VS DN40 k 20
VS DN32 k 12
VS DN25 k 8
VS DN20 k 5
VS DN15 k 3
VS DN15 k 1 ,5
DN15 VS
k 0 ,6
20
10
5
4
3
2
7
1
0,7
0,5
0,4
0,3
0,2
0,1
0,07
0,05
10
20 30 50 70 100
200 300 500
700
1000
[kPa]
0,1
0,2 0,3 0,5 0,7 1 2 3 5 7
10
[b ar]
p v
Saturated steam flow chart
9I667E
p v
p 100 [ ]
1
M2H..FY..N
b
a
k VS
0,6
k VS
1 ,5
k VS
3
k VS
5
k VS
8
k VS
1 2
k VS
2 0
k VS
3 0
0,42
0,30
0,20
0,15
0,10
0,05
100 200 300 500 1000 [kPa]
1 2 3 5 7 10 [bar]
p 1
3 4 5 7 10 1
2 3 4 5 7 10 2 2 3 4 5 7 10 3 2 3
[kg/h]
.
m
Mounting notes
Two sets of mounting instructions are enclosed with the valve: Ref. 35640 (valve) and
Ref. 35677 (terminal housing).
Warning :
Always disconnect the power before fitting or removing the terminal
housing. The terminal housing is calibrated and matched to the actuator,
and should be replaced only by qualified personnel.
– A fine mesh strainer installed on the inlet side of the valve is essential to prevent the
ingress of grit.
– Vertical to horizontal mounting: Protection standard IP31. The valve must not be
suspended below the horizontal.
– The actuator must not be lagged.
– For special information on use in steam applications, see sheet 4026.
Siemens Building Technologies CA1N4348E / 11.1998
Landis & Staefa Division 3/6

Recommendation
Water systems should be cleaned, flushed and treated in accordance with current good
practice, as described, for example, in BSRIA Application Guides AG 8/91 and AG2/93.
For other relevant information, see also CIBSE Guide B (Section 7).
Technical data
Electrical interface:
Only admissisble with low voltage (SELV, PELV)
Supply voltage
AC 24 V, 50/60 Hz
– Max. voltage tolerance +15/–10 %
Nominal power See table 'Operating data' page 1
Control signal
DC 0 ...10 V or DC 4 ... 20 mA
Position feedback (output signal) DC 0 ...10 V = 0 ...100 % stroke
– Max. load 1.5 mA
– Accuracy ± 3 % of full scale
Nominal pressure
PN16
Operating pressure p e max:
Water up to 120 °C
1.6 MPa (16 bar)
Above 120 °C
1.3 MPa (13 bar)
Saturated steam
0.9 MPa ( 9 bar)
Pressure differential ∆p v max 1.0 MPa (10 bar)
Leakage at ∆p v = 0.1 MPa (1 bar) Max. 0.05 % k vs (to VDE/VDI2174)
Temperature of medium 2 ...180 °C
Valve characteristic (stroke, k v ) Linear, optimised in low opening range
Resolution ∆H / H100 > 1 : 1000 (H = Stroke)
Type of operation
Modulating
Manual adjustment
Up to max. 90 %, depending on DN
Position when de-energised Closed
Orientation
Upright to horizontal
Positioning time *)
< 1 s
Materials:
Housing
Spheroidal graphite cast iron (GGG40.3)
Seat / inner valve
CrNi steel
Valve stem seal
EPDM (O ring)
Connection terminals
Screw terminals for 4 mm2 wire
Protection standard
Upright to horizontal mounting IP31 to IEC529
Ambient temperature 2 ... 50 °C
Weight (incl. packaging) See table 'Dimensions' on page 6
Conformity
Meets the requirements for CE marking
*) The valve can be fitted with a Z200/... damping device to achieve a slower closing time of 10 ... 30 s.
Internal diagram
NS = system ground
LS ~
1
G
+
AC 24 V
2
–
NS
T
M
60365
Block diagram of
signal converter
Input DC 0 ...10 V
Output DC 4 ... 20 mA
3
5
R
T
+
–
V
V
E
Q
Position
transducer
Output DC 0 ...10 V
4
Position-feedback electronics
with base/span adjustment
U
Key to block diagram
E Phase cut converter
G Bridge rectifier
M Magnetic valve
Q Phase cut output
R
T
U
V
Input resistor 50 k ohms
Voltage / current converter
(load on 350 ohms to NS)
Position / voltage converter
Differential amplifier
CA1N4348E / 11.1998
Siemens Building Technologies
4/6 Landis & Staefa Division

Connection
terminals
Warning :
If the controller and the valve receive their supply from a separate source,
the valve transformer must not be earthed on the secondary side.
1
2
3
4
5
6
40555B
~
⊥
TE
AC 24 V supply
Common
Input DC 0 ...10 V
Output DC 0 ...10 V
Input DC 4 ... 20 mA
Connection
diagrams
• with DESIGO 30
• with INTEGRAL RS
– refer to manual R21
– refer to manual K21
• with MULTIREG
Warning :
The T2 transformer must not be earthed on the secondary side and
should be suitably fused.
T1
T2
AC 24 V
AC 24 V
RPR1
M2H...FY...N
50243en
AC 24 V
GND
Output DC 0 ...10 V
Input DC 0 ...10 V
1
2
3
15
9
1)
Valve position indication
DC 0 ...10 V = 0 ...10 %
U
1)
1
2
3
4
5
6
~ AC 24 V Supply
Common
Input DC 0 ..10 V
Output DC 0 ..10 V
T E
• with other controllers
(output DC 0 ...10 V)
T2
AC 24 V
M2H...FY...N
50244en
Output DC 0 ...10 V
Valve position indication
DC 0 ...10 V = 0 ...100 %
1)
U
1
2
3
4
5
6
~
T E
AC 24 V Supply
Common
Input DC 0 ...10 V
Output DC 0 ...10 V
• with other controllers
(output DC 4... 20 mA)
T2
AC 24 V
M2H...FY...N
50996en
Output DC 4 ... 20 mA
Valve position indication
DC 0 ...10 V = 0 ...100 %
1)
U
1
2
3
4
5
6
~ AC 24 V Supply
Common
Output DC 0 ... 10 V
Input DC 4 ... 20 mA
T E
1) only if needed
Siemens Building Technologies CA1N4348E / 11.1998
Landis & Staefa Division 5/6

Application
examples
Examples of installation in straight-through applications (principles only, without
installation-specific details)
9H808 A
9H807 A
D
E
D : District heating (supply heating) system, indirect connection
E : District heating (supply heating) system, directly connected to water-heating system.
Dimensions
All dimensions in mm
940224
min.
100
ø 40
F
ø E
H
Cable connection max. 2 x ø 11,8
b
ø d
1 2
ø k
ø D
Flange dimensions to DIN2533, PN16
DN
L
Valve type L ø D ø d b ø k H ø E F W
M2H15FY...N 130 95 4x14 14 65 318 80 84 7.3
M2H20FYN 150 105 4x14 16 75 320 80 84 8.3
M2H25FYN 160 115 4x14 16 85 338 80 84 9.3
M2H32FYN 180 140 4x18 18 100 373 100 94 14.3
M2H40FYN 200 150 4x18 18 110 434 100 94 16.8
M2H50FYN 230 165 4x18 20 125 518 125 108 27.0
W = Weight (incl. packaging) in kg
© 1998 Siemens Building Technologies Ltd.
CA1N4348E / 11.1998
Siemens Building Technologies
6/6 Landis & Staefa Division