Siemens VRD40.040, VGD40.050/L, VGD40.065/L, VRD40.050, VRD40.065 Operation Manual And Mounting Instructions
...
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!
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Building Technologies Operation Manu al and Mounting Instruc tions VGD4 / VRD4 / SKPx5 CC1U7643en
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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 gasfired 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.
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Building Technologies Operation Manu al and Mounting Instruc tions 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
/CL
OSE
D
With v
alvestrokedisplay
Withou
tendswitc
h
With c
onstantpressuregove
rno
r
A
I
R
TheSKP15/SKP2
5actuator
s
c
a
nbe
c
o
mbineda
twillwiththeVGD4/VRD4doublegasvalves.
1 x VGD40/VRD40 + 2 x SKP15
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Building Technologies Operation Manu al and Mounting Instruc tions VGD4 / VRD4 / SKPx5 CC1U7643en
14.03.2018
2 Description of the SKPx5 actuators
Operating mode display
Valve stroke display
7
6
43z81en/101
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!
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Building Technologies Operation Manu al and Mounting Instruc tions VGD4 / VRD4 / SKPx5 CC1U7643en
14.03.2018
2.1 Electrical connection
120 V~/230 V~ activation of the SKPx5 actuator
7643z43/070
6
N L 1 2
3
1
2
3
Potential-free end switch
(indicating the
fully closed position) only
with the SKPx5.xx1xx actuator
123
123NL
Closed valve
7643z76en/1017
7643z77en/1017
For all types
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Building Technologies Operation Manu al and Mounting Instruc tions VGD4 / VRD4 / SKPx5 CC1U7643en
14.03.2018
2.2 SKP15 actuator
7643z73/0 817
1
2
3
4
•
Valve stroke dis play
‚
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.
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