Siemens VGD4 series User manual

CC1U7643en
14.03.2018
Building Technologies
Operation Manual and Mounting Instructions for a
VGD4/VRD4 double gas valve with 2 SKPx5
actuators
Β
Note!
The combination of a VGD4/VRD4 double gas valve with a QPLx5 pressure switch
and SKPx5 actuator does not require any maintenance.
Caution!
This document is intended for end users. All legal, safety, warning, and
technical notes contained in the data sheets for the SKPx5 actuator (N7643),
VGD4 double gas valve (N7631), VRD4 double gas valve for biogases and
recycling gases (N7649), and the QPLx5 pressure switch (N7221) are also
applicable!

2/17
Building Technologies Operation Manual and Mounting Instructions VGD4 / VRD4 / SKPx5 CC1U7643en
14.03.2018
1 Use
The combination of the SKPx5 actuator and VGD4/VRD4 double gas valve takes on
the functions of a
∂Safety shutoff valve (SKP15)
∂Safety shutoff valve with specific pressure control (SKP25)
1.1 SKP15 actuator
The electrohydraulically operated SKP15 gas fittings together with VGD4/VRD4 work
exclusively as a safety shutoff valve (OPEN/CLOSED) and are used primarily on gas-
fired combustion plant. They open slowly and close rapidly. The SKP15 actuator can be
supplied with end switches including a valve stroke display or without an end switch or
valve stroke display.
1.2 SKP25 actuator
The electrohydraulically operated SKP25 gas fittings together with VGD4/VRD4 work
as a safety shutoff valve (OPEN/CLOSED) and are also used as a gas pressure
governor. This controls the gas pressure on the outlet side according to the setpoint
value established by means of a setpoint spring. The SKP25 actuator can be supplied
with or without an end switch.
The valve stroke display is generally provided.

3/17
Building Technologies Operation Manual and Mounting Instructions VGD4 / VRD4 / SKPx5 CC1U7643en
14.03.2018
1.3 Application example
1 x VGD40/VRD40 + 1 x SKP15 and 1 x SKP25
7643z80en/0718
OPEN/CLOSED
W
ith valve stroke display
With end switch
SKP15.001
OPEN/CLOSED
SKP15.000
Without valve stroke display Without end switch
SKP15.001 SKP25.003
OPEN/CLOSED
With valve stroke display
With end switch
OPEN
/
C
L
O
S
E
D
With v
a
l
v
e
s
t
r
o
k
e
d
i
s
p
l
a
y
Withou
t
e
n
d
s
w
i
t
c
h
With c
o
n
s
t
a
n
t
p
r
e
s
s
u
r
e
g
o
v
e
r
n
o
r
A
I
R
T
h
e
S
K
P
1
5
/
S
K
P
2
5
a
c
t
u
a
t
o
r
s
c
a
n
b
e
c
o
m
b
i
n
e
d
a
t
w
i
l
l
w
i
t
h
t
h
e
V
G
D
4
/
V
R
D
4
d
o
u
b
l
e
g
a
s
v
a
l
v
e
s
.
1 x VGD40/VRD40 + 2 x SKP15

4/17
Building Technologies Operation Manual and Mounting Instructions VGD4 / VRD4 / SKPx5 CC1U7643en
14.03.2018
2 Description of the SKPx5 actuators
Operating mode display
Valve stroke display
7
6
4
3
z
8
1
e
n
/
1
0
1
7
The valve stroke display indicates the relative valve stroke. Depending on the tolerance
limits, the fully closed position of the valve may vary. The maximum achievable valve
stroke with a fully open valve seat varies according to the type and size of the valve:
From 12 mm to 25 mm. During normal operation of an SKP25 actuator, it is also
possible to observe the stability and oscillation tendency in addition to the opening of
the valve seat.
Β
Note!
SKP15.000Ex actuators do not have a valve stroke display!

5/17
Building Technologies Operation Manual and Mounting Instructions VGD4 / VRD4 / SKPx5 CC1U7643en
14.03.2018
2.1 Electrical connection
120 V~/230 V~ activation of the SKPx5 actuator 
7
6
4
3
z
4
3
/
0
7
0
6
N L 1 2
3
1
2
3
Potential-free end switch
(indicating the
fully closed position) only
with the SKPx5.xx1xx actuator
1
2
3
1
2
3
N
L
Closed valve
7643z76en/1017
7643z77en/1017
For all types

6/17
Building Technologies Operation Manual and Mounting Instructions VGD4 / VRD4 / SKPx5 CC1U7643en
14.03.2018
2.2 SKP15 actuator
7643z73/0817
1
2
3
4
•
Valve stroke display
‚
Indication of operating state (LED)
ƒ
Power supply
„
End switch (valve CLOSED)
Β
Service note!
No spare parts are available for the SKP15 actuator (security regulating unit).
The entire actuator can only be replaced by contacting the burner manufacturer.

7/17
Building Technologies Operation Manual and Mounting Instructions VGD4 / VRD4 / SKPx5 CC1U7643en
14.03.2018
2.3 SKP25 actuator
7643z7 9/0817
1
2
34
5
7
6
AIR
GAS
•
Valve stroke display
‚
Indication of operating state (LED)
ƒ
Power supply
„
End switch (valve CLOSED)
…
Setpoint spring setting
†Vent opening /
Assembly of the AGA25.2 damping
throttle
‡
Gas connection
Key
po Control pressure
Β
Service note!
No spare parts are available for the SKP25 actuator (security regulating unit).
The entire actuator can only be replaced by contacting the burner manufacturer.
Β
Note!
The vent opening†must not be closed or clogged as a result of contamination.

8/17
Building Technologies Operation Manual and Mounting Instructions VGD4 / VRD4 / SKPx5 CC1U7643en
14.03.2018
2.4 Description of the VGD4/VRD4 double gas
valve
Work on the VGD4/VRD4 double
gas valve may only be carried out
by qualified personnel.
mbar
Maximum operating pressure
Pmax = 100 kPa DN 40/50
Pmax = 70 kPa DN 65…150
Ambient temperature
-15...+60°C
Valve 1 + Valve 2, Class A, Group 2
according to EN 161
Gas Gaz
<60°C air
Family 1 + 2 + 3
7643z83/0817
Built-in filter, mesh size 0.9 mm
2.5 Mounting position
7
6
4
3
z
8
4
/
0
3
1
8
AGA66
Β
Note!
The AGA66 gasket set increases the degree of
protection for the valve combination from IP54 to
IP65!
2.6 Torques
Max. torques / flange connection and stud screws
according to DIN 939
∂Tighten locking and connecting screws in the
appropriate manner
∂Note the material pairing of aluminum/steel!
DN 40...100 M16 x 65 50 Nm
DN 125 M16 x 75 50 Nm
DN 150 M20 x 80 90 Nm
Max. torque of the pressure connections
M4 G1/8 G1/4 G3/4
3 Nm 8 Nm 15 Nm 35 Nm

9/17
Building Technologies Operation Manual and Mounting Instructions VGD4 / VRD4 / SKPx5 CC1U7643en
14.03.2018
2.7 Installation dimensions for the VGD4 double
gas valve with SKPx5 actuator
7643z70/0318
Type DN A B C D E F G H
SKP15
SKP25
H1 H2 H1 H2
VGD40.040 / L
VRD40.040 40 240 195 168 115 58 88 110 194 382 267 415 300
VGD40.050 / L
VRD40.050 50 240 202 175 115 58 88 125 194 382 267 415 300
VGD40.065 / L
VRD40.065 65 290 214 195 118 60 102 145 200 388 270 421 303
VGD40.080 / L
VRD40.080 80 310 236 204 132 54 107 160 224 412 280 445 313
VGD40.100 / L
VRD40.100 100 350 259 228 145 43 131 180 255 443 298 476 331
VGD40.125 / L
VRD40.125 125 400 305 256 175 31 150 210 303 491 316 524 349
VGD40.150
/ L
VRD40.150 150 480 335 294 188 20 168 240 333 521 333 554 366
VGD41.040
40 240 195 149 115 58 88 110 194 382 267 415 300
VGD41.050
50 240 202 160 115 58 88 125 194 382 267 415 300
VGD41.065
65 290 214 178 118 60 102 145 200 388 270 421 303
VGD41.080
80 310 236 192 132 54 107 160 224 412 280 445 313
VGD41.100
100 350 259 208 145 43 131 180 255 443 298 476 331
VGD41.125
125 400 305 236 175 31 150 210 303 491 316 524 349
VGD41.150
150 480 335 276 188 20 168 240 333 521 333 554 366
Β
Note!
VGD40.xxxL double gas valves are supplied with reverse-mounted connecting plates.

10/17
Building Technologies Operation Manual and Mounting Instructions VGD4 / VRD4 / SKPx5 CC1U7643en
14.03.2018
2.8 Pressure connections
7643z71/0318
VGD40/VRD40
VGD40/VRD40
Pressure switch connecting
plate
AGA40.40
7
6
4
3
z
7
1
/
0
4
1
8
Pilot gas connecting plate
AGA40.41
Pressure switch connecting plate (mounted on both
sides)
7643z 71/0418
VGD41
VGD41
Key
Mounting surface of the QPLx5 pressure switch
+Pressure connection for the QPLx5 pressure
switch
Β
Note!
Remove M4 locking screws as required.
(G 1/4") (G 1/8") (G 1/4") (G 3/4") (G 1/8") (G 1/4")
Strainer
1 9 3
4
5
2
76
8
V1 V2
7643z72en/0718
10
Key
pi Inlet pressure
pm Pressure between valve
V1/V2
po Outlet pressure for valve V2

11/17
Building Technologies Operation Manual and Mounting Instructions VGD4 / VRD4 / SKPx5 CC1U7643en
14.03.2018
3 Description of the mountable QPLx5
pressure switches
The QPLx5 pressure switch is designed to monitor the gas pressure. When the
pressure falls below or exceeds the adjusted switching point, the respective electrical
circuit will be opened or changes over.
Caution!
Service note!
The QPLx5 also has to be replaced when replacing a valve.
It is recommended to replace the QPLx5 after over 50,000 cycles or a service
life of 10 years due to the designed lifetime for gas pressure switches
according to AFECOR. It is not recommended to reinstall these, even if the
seals on the valve have been replaced.
¼'' double nipple required
7
6
3
1
z
5
4
e
n
/
0
3
1
8
p
i
p
o
p(p)
m vps
QPL25
QPL25
p i
QPL15
QPL15
QPL15

12/17
Building Technologies Operation Manual and Mounting Instructions VGD4 / VRD4 / SKPx5 CC1U7643en
14.03.2018
Attachment options
7
6
4
3
z
8
5
/
0
3
1
8
QPL15
pm
QPL15
pm
QPL15
pi
7643z86/0318
7
6
4
3
z
8
7
/
0
3
1
8
3x pressure switches (2x pm, pi) Example (not binding)
Valve proving control "A"
Example (not binding)
Valve proving control "B" and
pressure switch QPL15 (pi) below
Key
pi Inlet pressure
pm (pvps) Pressure between valve V1/V2
po Outlet pressure for valve V2

13/17
Building Technologies Operation Manual and Mounting Instructions VGD4 / VRD4 / SKPx5 CC1U7643en
14.03.2018
4 Connection diagram
4.1 Function as a minimum/maximum pressure
switch
Minimum pressure switch
When the pressure falls below the set
value, NO opens and NC closes
Maximum pressure switch
When the pressure exceeds the set value,
NC opens and NO closes
4.2 Connection via connector AGA65 according to
DIN 43650

14/17
Building Technologies Operation Manual and Mounting Instructions VGD4 / VRD4 / SKPx5 CC1U7643en
14.03.2018
5 Technical data
5.1 SKPx5 actuator
Operation DIN EN 60721-3-3
Climatic conditions Class 3K3
Mechanical conditions Class 3M3
Temperature range -10…+60°C
(longer opening times below 0°C)
-20…+60°C
(with heating element AGA63.5A27)
↑SKP25.2 -10…+50°C
(restricted operating conditions
Humidity <95% r.h.
Installation altitude Max. 2,000 m above sea level
5.2 VGD4/VRD4 double gas valve
Operation DIN EN 60721-3-3
Climatic conditions Class 3K5
Mechanical conditions Class 3M2
Temperature range -10…60°C
Humidity <95% r.h.
Installation altitude Max. 2,000 m above sea level
Β
Note!
For the model number of the VGD4/VRD4 double gas valve, see the nameplate on
the SKPx5 actuator!
5.3 QPLx5 pressure switch
Operation DIN EN 60721-3-3
Climatic conditions Class 3K5
Mechanical conditions Class 3M2
Temperature range -15…+60°C
Humidity <95% r.h.
Caution!
Condensation, formation of ice, and ingress of water are not permitted.
Environmental
conditions
Environmental
conditions
Environmental
conditions

15/17
Building Technologies Operation Manual and Mounting Instructions VGD4 / VRD4 / SKPx5 CC1U7643en
14.03.2018
6 Spare parts and accessories
Please note the different article numbers for the VGD4/VRD4 double gas valves and
the SKPx5 actuator when ordering spare parts.
Article no Type
Adapter plug
For powering both SKPx5 actuators on the
VGD4/VRD4 double gas valve with an
AGA64 connector.
BPZ:AGA62.000A000 AGA62.000A000
Contact box for valve actuator (power supply)
∂Plug-in connector conforming to DIN EN
175301-803-A
∂3-pole + protective ground
∂Ø 6…9 mm / max. 1.5 mm²
BPZ:AGA64 AGA64
Contact box for end switch
∂Plug-in connector conforming to DIN EN
175301-803-A
∂3-pole + protective ground
∂Ø 4.5…11 mm / max. 1.5 mm²
BPZ:AGA65 AGA65
Heating element
∂For use at low ambient temperatures
(-10…< -20°C)
∂Refer to data sheet N7923
BPZ:AGA63.5A27 AGA63.5A27
Gasket set
∂For mounting between SKPx5 actuator and
VGD4/VRD4 double gas valve
∂Increases degree of protection from IP54 to IP65
∂Take note of data sheet N7631 when using
VGD4/VRD4 double gas valves
∂Refer to Mounting Instruction M7643.2
(74 319 0421 0)
BPZ:AGA66 AGA66
Damping throttle for the SKP25 actuator
Optional BPZ:AGA25.2 AGA25.2

16/17
Building Technologies Operation Manual and Mounting Instructions VGD4 / VRD4 / SKPx5 CC1U7643en
14.03.2018
Article no Type
Setpoint spring (yellow/gold) for SKP25 actuator
∂Optional for built-in standard spring AGA29
∂1.5…12 kPa for SKP25.0 actuator
∂7…70 kPa for SKP25.4 actuator
(optionally for AGA23 setpoint spring)
∂Ø 1.6 mm
BPZ:AGA22 AGA22
Setpoint spring (red) for SKP25 actuator
∂Optional for built-in standard spring AGA29
∂10…25 kPa for SKP25.0 actuator
∂15…150 kPa as a standard spring for SKP25.4
actuator
∂Ø 1.8 mm
BPZ:AGA23 AGA23
Setpoint spring (unpainted) for SKP25.0 actuator
∂Equivalent built-in standard spring
∂0.05…2.2 kPa
∂Ø 1 mm
BPZ:AGA29 AGA29
AGA30.x setpoint fine adjustment for SKP25
actuator
∂Packaging version with one setpoint spring each
∂Refer to Mounting Instruction M7643
(74 319 0926 0)
Setpoint spring (gold)
∂1.5…12 kPa
∂Ø 1.6 mm
BPZ:AGA30.0 AGA30.0
Setpoint spring (red)
∂10…25 kPa
∂Ø 1.8 mm
BPZ:AGA30.1 AGA30.1
Setpoint spring (unpainted)
∂10…36 kPa
∂Ø 2 mm
BPZ:AGA30.2 AGA30.2

17/17
Building Technologies Operation Manual and Mounting Instructions VGD4 / VRD4 / SKPx5 CC1U7643en
14.03.2018
7 Lifetime
The combination of VGD4/VRD4 double gas valve and SKPx5 actuator has a design
lifetime* of
Nominal size Burner startup cycles
′DN 25 200,000
DN 25...80 100,000
DN 80...150 50,000
when using gases according to EN 437 (or DVGW specification G260).
This is based on the endurance tests specified in the standard EN 161.
A summary of the conditions has been published by the European Control
Manufacturers Association (Afecor) (www.afecor.org).
The designed lifetime is based on the use of a VGD4/VRD4 double gas valve and an
SKPx5 actuator according to the manufacturer’s data sheet. After reaching the
designed lifetime in terms of the number of burner startup cycles, or after the
corresponding usage time, the VGD4/VRD4 double gas valve and SKPx5 actuator
must be checked and/or replaced by authorized personnel.
The criteria set out in EN 161 / EN 13611 are applicable when testing the tightness.
This test can be omitted if a valve proving system is in place.
* The designed lifetime is not the warranty time specified in the Terms of Delivery.
Safety components Structural lifetime CEN standard
Number of cycles Time (years)
Gas pressure monitor 50,000 10 EN 1854
Double gas valve (with valve proving
system) After detecting a fault EN 1643
Double gas valve (without valve proving
system) 50,000…200,000 10 EN 126 EN 161
Siemens AG Building Technologies
Berliner Ring 23
76437 Rastatt, Germany
Tel. [phone]
Fax [phone]
www.siemens.com
© 2018 Siemens AG Building Technologies
Subject to change!