Gas Valves VGG VGF VGH · 2013-01-25 · 3/18 Building Technologies CC1N7636en HVAC Products...

CC1N7636en 11.06.2008

Building TechnologiesHVAC Products

7636

VGG... VGF... VGH... Gas Valves VGG...

VGF...VGH...

• Single valves of class A for installation in gas trains • Safety shutoff valves conforming to EN161 in connection with actuators • Suitable for use with gases of gas families I...III • Gas valves in connection with actuators open slowly and close rapidly • 2-port valves of the normally closed type • ½“... DN125 • The gas valves are used in combination with the SKP… / SKL… actuators • As a control valve in connection with SQX... actuators and AGA60 adapter

(not as a safety shutoff valve) • Supplementary Data Sheets on actuators (refer to «Mechanical design») The VG... and this Data Sheet are intended for use by OEMs which integrate the gas valves in their products!

2/18

Building Technologies CC1N7636en HVAC Products 11.06.2008

Use The gas valves are used primarily - for application at gas-fired combustion plant - for gas trains at forced draft burners The gas valve is used as: - Shutoff valve (in combination with SKP1...) - Control valve with shutoff feature (in combination with SKP2..., SKP5… or SKP7…) - As shutoff or control valves in the supply air line of industrial combustion plant with

or without heat recovery system If the gas valves are used with gases other than those of gas families I...III, Siemens assumes no responsibility for the valve’s durability and life expectancy. All types of gas valves can be combined with any of these actuators.

Warning notes To avoid inquiry to persons, damage to property or the environment, the follow-ing warning notes must be observed! • Do not open, interfere with or modify the gas valves except when installing the

service replacement kit • Any opening of the gas valve, replacement of parts or modifications to the original

product is the user’s responsibility and carried out at his own risk • All activities (mounting, installation and service work, etc.) must be performed by

qualified staff • When used in connection with gas, the gas valves constitute part of the safety

equipment • In combination with SQX... or SKL... actuators, the gas valves must not be used as

safety devices • Fall or shock can adversely affect the safety functions. Such gas valves must not

be put into operation, even if they do not exhibit any damage • Not suitable gases or gas components causes loss of the safety shutoff function • It may not join contaminant / particles in the valve, because that could adversely

affect the safety shutoff function

Engineering notes Owing to the profile of valve disc, the gas valves are especially suited for control func-tions. Benefit: Good control performance and hardly prone to hunting in low-fire operation.

7636z10/0502

123

Legend 1 Stem 2 Profile 3 Valve disc

Profile (only for VGG... / VGF...)

3/18


Mounting notes • Ensure that the relevant national safety regulations are complied with • The actuator can be mounted or replaced while the gas valve is under pressure • Refer also to the following Mounting Instructions

AGA66 M7643.2 74 319 0421 0 VGF M7636 / M7631 431920720 VGFDN40...80 M7636.1/M7633 431920500 VGG M7636 / M7631 431920720 VGG1/2"...3" M7636.1/M7633 431920500 VGH M7636 / M7631 431920720 VGx10.654 M7636.2 431923450 VGx10.804 M7636.2 431923450

• Check to ensure that the gas valve is tight when all components are connected • Check to ensure that the gaskets between the flanges and the gas valve must be

fitted The permissible mounting positions of the actuator must be observed, however (refer to the relevant Data Sheet). The direction of gas flow must be in accordance with the direction of the arrow on the valve body. The inactive gas valve is closed and opens when the actuator opens. • Check to ensure that cuttings not falling into the gas valve when mounting the con-

necting pipes. As the case arises, the gas valve can be opened and cleaned from below (spring dome)

• To prevent cuttings from falling into the gas valve, first mount the flanges on the

pipes and then clean the parts • Check to make certain that the bolts of the flanges are properly tightened and af-

terwards check to ensure that the gas valve is tight when all components are con-nected

Sealing / tightness

Mounting position

Direction of flow

Function

Only VGG...:

Only VGD20…

Only VGF.../VGH...

4/18


Standards and certificates

Conformity to EEC directives - Electromagnetic compatibility EMC (immunity) - Directive for gas appliances - Directive for pressure devices

2004/108/EC 90/396/EEC 97/23/EC

ISO 9001: 2000 Cert. 00739

ISO 14001: 2004 Cert. 38233

For use in the U.S. / Canada, the gas valves carry type suffix «U» (see example) and , and listed. Example: VGG10.204U

Type reference

VGG10.154P x x --- VGG10.204P x x x VGG10.254P x x x VGG10.404P x x x VGG10.504P x x x VGG10.804P x x x VGG10.1541P x x --- VGG10.2041P x x --- VGG10.2541P x x --- VGG10.4041P x x --- VGG10.5041P x x --- VGG10.204 x x --- VGG10.254 x x --- VGG10.404 x x --- VGG10.504 x x --- VGF10.404P x x --- VGF10.504P x x --- VGF10.654P x x x VGF10.804P x x x VGF10.5041P x x --- VGF10.6541P x x --- VGF10.8041P x x --- VGF10.404 x x --- VGF10.504 x x --- VGF10.654 x x --- VGF10.804 x x --- VGH10.18050 x x x VGH10.19050 x x x VGH10.19150 x x x

Approvals in combina-tion with actuator

5/18


Service notes • Each time a gas valve has been replaced, check to ensure that the gas valve oper-

ates correctly and that it is tight both internally and externally • Siemens gas valves may only be repaired by Siemens HVAC Repair Centers • VGH... gas valves are supplied without strainer. Fit a gas filter upstream of the gas

valve or an AGA... strainer (refer to «Accessories») by the gas inlet

Life cycle The combination gas valve VG... and actuator have a designed lifetime* of 100,000 burner startup cycles which, under use of gases to EN437 (or DVGW specification G260). This lifetime is based on the endurance tests specified in standard EN161 and the table containing the relevant test documentation as published by the European Association of Component Manufacturers (Afecor) (www.afecor.org). The designed lifetime is based on use of the gas valve VG... and actuator according to the manufacturer’s Data Sheet. After reaching the designed lifetime in terms of the number of burner startup cycles, or the respective time of usage, the gas valve VG... and actuator are to be replaced by authorized personnel. * The designed lifetime is not the warranty time specified in the Terms of Delivery

Disposal notes Local and currently valid legislation must be observed.

6/18


Mechanical design The gas valves are dead closed in combination with actuator. The stem is guided on both sides of the valve disc, ensuring precise axial stroke and tight shutoff. A strainer made of stainless steel is fitted in the gas valve’s inlet and protects the gas valve, the seat and disc as well as downstream devices against dirt. For use with profile, the gas valves carry type suffix «P» (see example) Example: VGG10.154P A strainer type AGA... is available as an accessory item (refer to «Accessories»). The gas valves are supplied without strainer (refer to «Engineering notes»). They are of the normally closed one-way high-flow type. The swiveling disc of gas valve has no profile. The gas valves can be combined with the following types of actuators: Type reference Data Sheet Function SKP15... N7643 ON / OFF SKP25... N7643 ON / OFF with constant pressure con-

trol SKP25.7... with SQS37...

N7643 ON / OFF with pressure control and via electric signal alterable setpoint set-ting

SKP55... N7643 ON / OFF with differential pressure control, signal input → differential pres-sure

SKP75... N7643 ON / OFF with ratio control, signal input → static pressure

SKL25... (only for air) N7643 ON / OFF with constant pressure con-trol, slow closing 4...6 s, no function of safety shutoff

SQX... with AGA60 N4554 Steady position control, no function of safety shutoff

VGG... / VGF...

Stem

Strainer

Valve seat

VGH...

Strainer

Valve seat

Actuators

7/18


Type summary (other types of gas valves on request)

Perm. operating pressure in

mbar

Number of connections Type reference

With profile Without profile

Nominal size

Material

Europe

(to EN)

Other

countries

Air flow rate

at

Δp = 1 mbar

/ m³ / h

Test point

RP ¼ 3)

Pilot gas

G ¾ 4)

Without stroke

limitation

With stroke

limitation 1)

Without stroke

limitation

With stroke

limitation 1)

Internally threaded to ISO 7/1 ½“ Die-cast al. 1200 1200 4.8 4 --- VGG10.154P VGG10.1541P --- ---

¾“ Die-cast al. 1200 1200 (1400)* 8.9 4 --- VGG10.204P VGG10.2041P VGG10.204 ---

1“ Die-cast al. 1200 1200 (1400)* 13.3 4 --- VGG10.254P VGG10.2541P VGG10.254 ---

1 ½“ Die-cast al. 600 600 (1400)* 32.3 4 --- VGG10.404P VGG10.4041P VGG10.404 ---

2“ Die-cast al. 600 600 (1400)* 47.4 4 --- VGG10.504P VGG10.5041P VGG10.504 ---

3“ Cast iron 600 600 (700)* 85.4 2 2 VGG10.804P --- --- ---

* Only for use in Australia

With flange, PN16, to ISO 7005

DN40 Cast iron 600 600 32.3 4 --- VGF10.404P --- VGF10.404 ---

DN50 Cast iron 600 600 47.4 4 --- VGF10.504P VGF10.5041P VGF10.504 ---

DN65 Cast iron 600 600 (700)* 74 2 2 VGF10.654P VGF10.6541P VGF10.654 ---

DN80 Cast iron 600 600 (700)* 85.4 2 2 VGF10.804P VGF10.8041P VGF10.804 ---

* Only for use in Australia

Flap type gas valves: High-flow with swing type disc.

Great closing force.

Version without strainer, to DIN, only for use on plant with gas strainer.

We recommend to install a strainer (refer to «Accessories» AGA80, AGA90 or AGA91!

These gas valves may only be revised by Siemens Repair Centers

DN80 Cast iron 300 600 (700)* 128.4 4 1 --- --- VGH10.18050 ---

DN100 Cast iron 300 400 (700)* 199.5 4 1 --- --- VGH10.19050 ---

DN125 5) Cast iron 250 250 (500)* 277.6 4 1 --- --- VGH10.19150 ---

* Only for use in Australia with SKPxx.xxxFxx (must be checked by application side)

1) Cannot be used with attached pressure

governor 4) Inlet side, VGF... with one connection on

each side 2) Flow rate reduced by 20 % 5) Only for SKPx5.xxxFxx 3) On inlet and outlet side

Ordering When ordering, please give the complete gas valve type reference. Actuator and gas valve are supplied as single packs. Example: 1 piece VGF10.654P flanged valve DN65 1 piece actuator

Legend (also refer to «Dimensions»)

8/18


Accessories

Manual adjuster AGA61

Adapter for SQX... actuators AGA60Consisting of 2 stem parts and a connecting flange

Gasket kit to SKP... / SKL25... AGA66- Between actuator SKP… / SKL25… and gas valve VG… - For increasing of degree of protection from IP54 up to IP65 - Refer to Mounting Instruction M7643.2 (74 319 0421 0) Only VGG10.154…, VGG10.204…, VGG10.254…, VGG10.404…: When used in connection with AGA66, the maximum flow rates are reduced by about 25 %.

With circlip and 1 mm mesh size. Type reference of gas valve Type reference of strainer VGH10.18050 / DN80 AGA80 VGH10.19050 / DN100 AGA90

VGH10.19150 / DN125 AGA91

The strainers can be fitted in the flange sections of the gas valves, either on the gas inlet or gas outlet side.

VGH... Strainer

9/18


Technical data Valve class in connection with actuator A conforming to EN161

(except with SQX... / SKL...) Group 2 (EN161) Perm. medium temperature 0...60 °C Weight Refer to «Dimensions» Connecting flanges (VGF..., VGH...) PN16 to ISO 7005-2 Required flow rate Refer to «Flow chart» Perm. mounting position

7648z09/0603

(refer to «Mounting notes»)

Operating pressure Refer to «Type summary» Types of gases Refer to «Use» Strainer (only for VGG... / VGF...) Built-in, mesh size 0.9 mm Storage DIN EN 60721-3-1 Climatic conditions Class 1K3 Mechanical conditions Class 1M2 Temperature range -20...+60 °C Humidity <95 % r.h. Transport DIN EN 60721-3-2 Climatic conditions Class 2K3 Mechanical conditions Class 2M2 Temperature range -20...+60 °C Humidity <95 % r.h. Operation DIN EN 60721-3-3 Climatic conditions Class 3K3 Mechanical conditions Class 3M3 Temperature range -10...+60 °C Humidity <95 % r.h.

General unit data

Environmental conditions

10/18


Function

7636

z19/

0805

pE

Application example VGG... complete with SKP25...

Sectional view VGG... complete with SKP25...

pE

7636

z20/

0805

Sectional view of VGG...

11/18


Function (cont´d)

pE

7636

z23/

0408

Application example VGF... complete with SKP25...

Sectional view VGF... complete with SKP25...

pE

7636

z22/

0408

Sectional view of VGF...

12/18


Function (cont´d)

7636

z06e

/010

0

StrainerStrainer

Fully closed Fully open

Application example VGH... complete with SKP25...

Sectional view VGH... complete with SKP25...

7636

z21/

0805

pE

Sectional view of VGH...

13/18


Flow chart for VG... (For fully open gas valves only)

1000

700

500

400

300

200

100

70 50 40 30 20 10 7 5 4 3 2 1 0.7

0.5

0.4

0.3

0.2

23

45

710

23

45

710

02

34

57

1000

23

45

7m

/ h

1N

atur

al g

asm

/ h

2P

ropa

nem

/ h

3To

wn

gas

m /

h4

Air

43

210

007

54

32

100

75

43

210

75

43

2

34

57

103

45

710

02

34

57

1000

23

45

7 54

32

1000

75

43

210

07

54

32

107

54

32

pmbar

VGG

VGF

1/2"

3/4"

1"

DN40; 1

1/2" DN50

; 2"

DN65DN80

; 3"

DN80VG

HDN10

0 DN1251)

3)

3)

3)

1) C

orre

spon

ding

to fu

lly o

pen

v

alve

or g

over

nor

2) W

ithou

t stra

iner

s3)

Flo

w ra

te o

f val

ves

with

thro

ttle

2

0 %

low

er

Iff p

ossi

ble

sele

ct fl

ow ra

tew

ithin

bol

d lin

es!

7636

d01e

/060

8

Flow

cha

rt

For c

ontr

ol p

erfo

rman

ce re

ason

s, w

hen

usin

gth

e SK

P2...

act

uato

rs w

ith in

tegr

ated

gove

rnor

, the

nom

inal

val

ve s

ize

shou

ld n

ot b

eto

o la

rge.

Thi

s ap

plie

s in

par

icul

ar to

bur

ners

burn

ing

smal

l am

ount

s of

gas

in th

e lo

w-fi

repo

sitio

n an

d to

bur

ners

cha

ngin

g fr

omhi

gh-fi

re to

low

-fire

in le

ss th

an 5

s.

Con

vers

ion

fact

ors

1 N

atur

al g

as

1

.24

2 Li

quef

ied

petr

oleu

m g

as

0.77

3 To

wn

gas

1

1.

464

Air

f =

1

Cal

cula

tion

fo fa

ctor

"f"

For o

ther

type

s of

gas

es

dv =

den

sity

ratio

to a

ir

f =dv

(gas

)1

Flow

rate

m /

air

x W

obbe

num

ber (

MJ/

m )

= b

urne

r out

put (

MJ/

h)

Cal

cula

tion

exam

ple

Ava

ilabl

e pr

essu

re d

rop

acro

ss th

e va

lve

2

mba

r R

equi

red

flow

rate

6

0 m

/h

natu

ral g

asS

elec

tion

acco

rdin

g to

cha

rt

D

N1

1/2"

(poi

nt o

f int

erse

ctio

n of

2 m

bar a

nd 6

0 m

/h

natu

ral g

as)

3

3

33

___ Maximum flow rate (gas valve fully open)

1) The valve curves shown represent gas valves with no strainer. Each strainer reduces the flow rate by about 8 % The bold curves represent the recommended pressure drop ranges. Gas valves with higher pressure drops can cause excessive flow noise. Practical experience shows that applications outside the range confined by the bold characteristics could produce sig-nificant noise

Legend

14/18


Flow chart (cont´d) • In the case of burners with low-fire flow rates, select a tightly sized gas valve (refer

to the Data Sheet of the relevant actuator) • If the available gas pressure exceeds the maximum permissible operating pres-

sure, use an upstream pressure controller to lower it • The pressure drop (curves of maximum flow) is based on a fully open gas valve Conversion of air flow rate to a corresponding gas flow rate (natural gas):

Abscissa Volumetric flow «QG» in m³/h

Density ratio «dv» to air

Conversion factor f = 1

dv

1 Air 1 1 2 Natural gas 0.61 1.28 3 Propane 1.562 0.8 4 Town gas 0.46 1.47

Conversion to air (m³ / h) from other types of gases:

QL= QGf

QL = air volume in m³ / h that produces the same pressure drop as «QG»

When used in connection with actuators having an integrated governor, the nominal valve size should not be selected too large to ensure good control performance.

Note:

Basis for scale

15/18


Dimensions Dimensions in mm

VGH... / DN80...125 E G 3/4

H

P

Q

R

KA B

N M L

S T

F

4 x Rp 1/4

J

7636m05/0502

VGF... / DN 40...50

86S T

4 x Rp 1/4

J

C

D

80

60 E

F

A B K

R

Q N M L

P

7636m04/0502

16/18


Dimensions (cont´d) Dimensions in mm

VGF... / DN 65...80

86

G G´

Rp 1/4Rp 1/4 P

Q N M L

R

KA B

E

F80C

DS2 x G 3/4

J H

7636m07/0502

VGG… / 3“

H

86GG

Rp 1/4Rp 1/4

J

T2 x G 3/4

E

F

D

C

DN

80

DN

SW

7636m08/0502

17/18


Dimensions (cont´d) Dimensions in mm

VGG ½“...2“ 86

DN

SW

4 x Rp 1/4

TS

E

F

80

D

C

J DN

7636m01/0502

Mounting surface for actuator or AGA60 adapter flange for SQX... actuator

18/18


Dimensions (cont´d)

Tabl

e of

dim

ensi

ons

Typ

VGG

10.1

5...

VGG

10.2

0...

VGG

10.2

5...

VGG

10.4

0...

VGG

10.5

0...

VGG

10.8

0...

VGF1

0.40

...VG

F10.

50...

VGF1

0.65

...VG

F10.

80...

VGH

10.1

80...

VGH

10.1

90...

VGH

10.1

91...

DN

1)

1/2"

3/4"

1" 1 1/

2"2" 3" D

N40

DN

50D

N65

DN

80

DN

80D

N10

0D

N12

5

A ---

---

---

---

---

---

13 13 16,5

19 15 16 3

B ---

---

---

---

---

---

3 3 3 3 3 3 3

C 96 96 96 126

130

191

126

130

191

191

---

---

---

D 79 79 79 102

107

163

102

107

163

163

---

---

---

E 80 80 80 126

126

185

126

126

185

185

160

160

160

F 109

109

109

150

170

310

200

230

290

310

310

350

400

G ---

---

---

---

---

110

---

---

108

118

102

102

102

G´

---

---

---

---

---

110

---

---

108

118

102

102

102

H ---

---

---

---

---

68 ---

---

95 102

105

105

121

J 32 32 32 41 50 100

41 50 92 100

159

166

174

K ---

---

---

---

---

---

19 19 19 19 19 19 19

L ---

---

---

---

---

---

150

165

185

200

200

220

250

M ---

---

---

---

---

---

110

125

145

160

160

180

210

N ---

---

---

---

---

---

88 102

120

131

131

157

187

P ---

---

---

---

---

---

45°

45°

45°

22,5

°

22,5

°22

,5°

22,5

°

Q ---

---

---

---

---

---

90°

90°

90°

45°

45°

45°

45°

R ---

---

---

---

---

---

4 4 4 8 8 8 8

S 28 28 28 34 34 ---

36 42 ---

---

95 95 95

T 31 31 31 34 34 62 36 42 ---

---

95 95 95

SW*

46 46 46 60 75 120

---

---

---

---

---

---

---

kg 0,8

0,8

0,75

1,4

1,95

13,4

6 7,5

15,3

17,9

16,3

18,6

23,4

2)3)

DN

N

omin

al s

ize,

dim

ensi

on fo

r con

nect

ion

of m

ediu

m

1)

Flan

ge c

onfo

rmin

g to

ISO

700

5-2

2)

With

stro

ke li

mita

tion

3)

With

out s

troke

lim

itatio

n R

N

umbe

r of b

oreh

oles

; for

sta

ndar

ds fo

r fla

nges

and

thre

ads,

refe

r to

«Typ

e su

mm

ary

gas

valv

es»

* W

idth

acr

oss

flats

©2008 Siemens Building Technologies HVAC Products GmbH Subject to change!

Gas Valves VGG VGF VGH · 2013-01-25 · 3/18 Building Technologies CC1N7636en HVAC Products...

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Transcript of Gas Valves VGG VGF VGH · 2013-01-25 · 3/18 Building Technologies CC1N7636en HVAC Products...