Full Text Searchable PDF 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
V
G
D
40
/V
R
D
40
+
1
x
S
K
P
15
an
d
1
x
S
K
P
25
76
43
z8
0e
n/
07
18
O
P
E
N
/C
LO
S
E
D
W
ith
va
lv
e
st
ro
ke
di
sp
la
y
W
ith
en
d
sw
itc
h
S
K
P
15
.0
01
O
P
E
N
/C
LO
S
E
D
S
K
P
15
.0
00
W
ith
ou
tv
al
ve
st
ro
ke
d
is
pl
ay
W
ith
ou
te
nd
sw
itc
h
S
K
P
15
.0
01
S
K
P
2
5.
00
3
O
P
E
N
/C
LO
S
E
D
W
ith
va
lv
e
st
ro
ke
d
is
pl
ay
W
ith
en
d
sw
itc
h
O
P
E
N
/C
LO
S
E
D
W
ith
va
lv
e
st
ro
ke
di
sp
la
y
W
ith
ou
t
en
d
sw
itc
h
W
ith
co
ns
ta
nt
pr
es
su
re
go
ve
rn
or
A
IR
T
he
S
K
P
15
/S
K
P
25
ac
tu
a
to
rs
ca
n
be
co
m
bi
ne
d
at
w
ill
w
ith
th
e
V
G
D
4/
V
R
D
4
d
ou
bl
e
ga
s
va
lv
es
.
1
x
V
G
D
40
/V
R
D
40
+
2
x
S
K
P
15
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
76
43
z8
1
en
/1
01
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
76
43
z4
3
/0
70
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
7643z79/0817
1
2
3
4
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
z8
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
76
43
z7
1/
03
18
VGD40/VRD40
VGD40/VRD40
Pressure switch connecting
plate
AGA40.40
7
6
43
z7
1
/0
41
8
Pilot gas connecting plate
AGA40.41
Pressure switch connecting plate (mounted on both
sides)
76
43
z7
1
/0
41
8
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
7
6
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
76
31
z5
4
en
/0
31
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
76
43
z8
5/
03
18
QPL15
pm
QPL15
pm
QPL15
pi
7
64
3z
8
6
/0
3
1
8
76
4
3z
8
7/
03
18
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. +49 7222 598 279
Fax +49 7222 598 269
www.siemens.com
© 2018 Siemens AG Building Technologies
Subject to change!