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Siemens VGD4 series Operation Manual And Mounting Instructions

VRD4 series\ SKP15\ VGD40.040/L\ SKP*5 series\ SKP25\ VRD40.040\ VGD40.050/L\ VGD40.065/L\ VRD40.050\ VRD40.065\ VGD40.080/L\ VRD40.080\ VGD40.100/L\ VRD40.100\ VGD40.125/L\ VRD40.125\ VGD40.150/L\ VRD40.150\ VGD41.040\ VGD41.050\ VGD41.065\ VGD41.080\ VGD41.100\ VGD41.125\ VGD41.150

Made by: Siemens
Type: Operation Manual And Mounting Instructions
Category: Control Unit
Pages: 17
Size: 3.49 MB

 

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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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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.

 


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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

 


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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!

 


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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

 


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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.

 


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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.

 


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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

 


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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.

 


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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

 


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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

 


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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

 


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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

 


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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

 


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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

 


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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

 


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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!