Gas pressure regulators VGBF

Technical Information · GB
2 Edition 08.12

• Pressure regulators for gaseous media for installation in all types

of gas appliances
• Design with inlet pressure compensation diaphragm ensures
high control accuracy
• High flow rate due to optimal dimensioning
• Internal impulse on VGBF..05
• No breather line required
• EC type-tested and certified
• Certified by Gosstandart pursuant to GOST-TR
Contents
Gas pressure regulators VGBF . . . . . . . . . . . . . . . . . . . . . . . 1
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1 Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Examples of application . . . . . . . . . . . . . . . . . . . . . . . . . 4
2 Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3 Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4 Flow rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.1 Selection example for VGBF..05 . . . . . . . . . . . . . . . . . . . . 7
4.2 Selection example for VGBF..10 . . . . . . . . . . . . . . . . . . . 8
4.3 Selection example for VGBF..40 . . . . . . . . . . . . . . . . . . 9
5 Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.1 Type code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
6 Project planning information . . . . . . . . . . . . . . . . . . . . . . 11
6.1 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6.2 Installation to EN 746-2 . . . . . . . . . . . . . . . . . . . . . . . . . 11
7 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
7.1 Damping valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
8 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
8.1 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
8.2 Data table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
8.3 Spring table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
9 Maintenance cycles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Feedback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Contact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

VGBF · Edition 08.12 ▼ = To be continued 2

1 Application

VGBF..F
VGBF..R
The spring-loaded gas pressure regulator VGBF with inlet
pressure compensation diaphragm and zero shut-off serves
to maintain the set outlet pressure constant despite changing
gas flow rates and inlet pressures in gas pipelines. Thanks
to an additional safety diaphragm, no purge line is required.
For use in gas inlet sections in all sectors of the iron, steel, glass
and ceramics industries as well as in commercial heat genera-
tion, such as the packaging, paper and foodstuffs industries.

VGBF · Edition 08.12 3

Application

1.1 Examples of application

Gas inlet section

VGBF · Edition 08.12 4

2 Certification
EC type-tested and certified

pursuant to
– Gas Appliances Directive (2009/142/EC) in conjunction
with DIN EN 88 and DIN 3380.
– Pressure Equipment Directive (97/23/EC) in conjunction
with DIN EN 334.
Approval for Russia

Certified by Gosstandart pursuant to GOST-TR.

Approved by Rostekhnadzor (RTN).
Scan of the approval for Russia (RUS) – see www.docuthek.com
➔ Elster Kromschröder ➔ Products ➔ 02 Pressure regulators
➔ Gas pressure regulators VGBF ➔ Kind of document: Cer-
tificate ➔ VGBF B00093 (nationales Zertifikat Russland) (RUS).

VGBF · Edition 08.12 5

3 Function

Setpoint spring Safety

Setpoint spring diaphragm
Safety
Working
diaphragm
Setpoint diaphragm
spring
Inlet pressure
compensation
diaphragm Impulse
Impulse connection
connection
Working Impulse line
diaphragm Valve Valve seat
seat Valve disc
Valve disc

VGBF..R10, VGBF..R40 VGBF..F05 VGBF..F10, VGBF..F40

Gas pressure regulator VGBF is open when no pressure is If the outlet pressure increases, e.g. due to reduced consump-
applied. tion, the valve disc is closed further and the outlet pressure
The gas supply is opened slowly and the gas flows via the open decreases again.
valve seat to the pressure regulator outlet. The outlet pressure Thus, the outlet pressure is maintained constant despite chang-
is applied to the space beneath the working diaphragm via ing gas flow rates.
the impulse line. As soon as the outlet pressure corresponds If consumption is stopped, the valve disc cuts off the flow
to the set spring force, the working diaphragm lifts and the completely (zero shut-off).
valve disc connected to it reduces the flow rate.
Fluctuations in the inlet pressure are compensated by the inlet
If the outlet pressure drops, e.g. due to switching on a con- pressure compensation diaphragm.
sumer, the valve disc is opened further and the outlet pressure
Pressure test nipples can be installed to measure the inlet
increases again.
and outlet pressures.

VGBF · Edition 08.12 6

4 Flow rate
4.1 Selection example for VGBF..05
1000
Gas type: natural gas,
∆p [mbar]

800
600 flow rate Q = 500 m3/h,
500
400 inlet pressure pu = 200 mbar,
300 outlet pressure pd = 20 mbar,
200 P1 pressure loss ∆p = pu - pd = 180 mbar.
The result is intersection P1.

..05
100
The next largest nominal size is selected: VGBF 50..05.

150 5
.05
80. 5
05

..0
5
VG 65..0
80
..0
0..

100
At a pressure loss of ∆p = 180 mbar, the max. flow rate is
50

60
F4

BF

BF
BF

50
BF

BF
B

Qmax.: 580 m3/h, the min. flow rate is Qmin. derived from

VG

VG
40
VG
VG

VG
30 Qmin. = Qmax. x 10% = 58 m3/h.
20

10
8
6
5
4
3

1 1
20 30 40 60 80100 200 300 400 600 1000 2000 3000 5000
2
20 30 40 60 80100 200 300 400 600 1000 2000 3000 5000
3
20 30 40 60 80100 200 300 400 600 1000 2000 3000
4
20 30 40 60 80100 200 300 400 600 1000 2000 3000
Qn [m3/h]
 = natural gas (ρ = 0.80 kg/m3)
 = town gas (ρ = 0.64 kg/m3)
 = LPG (ρ = 2.01 kg/m3)
 = air (ρ = 1.29 kg/m3)

VGBF · Edition 08.12 7

Flow rate

4.2 Selection example for VGBF..10

1000
∆p [mbar]

Gas type: natural gas,

0
0
800

F 15
F 10
80
F 40

F 50
25
600 P1 flow rate Q = 600 m3/h,

F
BF
500

VGB
VGB
VGB
VGB

VGB
inlet pressure pu = 600 mbar,

VG
400
300
outlet pressure pd = 100 mbar,
200 pressure loss ∆p = pu - pd = 500 mbar.
The result is intersection P1.
100
80 The next largest nominal size is se-
60
50
lected: VGBF 80..10.
40
At a pressure loss of ∆p = 500 mbar,
30
the max. flow rate is Qmax.: 910 m3/h,
20
the min. flow rate is Qmin. derived from
Qmin. = Qmax. x 10% = 91 m3/h.
10
8
6
5
4
3

1 1
2 3 4 5 6 7 8 10 20 30 40 60 80100 200 300 400 600 1000 2000 3000 5000
2
3 4 5 6 7 8 10 20 30 40 60 80100 200 300 400 600 1000 2000 3000 5000
3
2 3 4 5 6 7 8 10 20 30 40 60 80100 200 300 400 600 1000 2000 3000
4
2 3 4 5 6 7 8 10 20 30 40 60 80100 200 300 400 600 1000 2000 3000
Qn [m3/h]
 = natural gas (ρ = 0.80 kg/m3)
 = town gas (ρ = 0.64 kg/m3)
 = LPG (ρ = 2.01 kg/m3)
 = air (ρ = 1.29 kg/m3)

VGBF · Edition 08.12 8

Flow rate

4.3 Selection example for VGBF..40

4000
∆p [mbar]

Gas type: natural gas,

00
80
50
15

0
3000

1
F2

F4
flow rate Q = 500 m3/h,

BF
BF
BF
BF

VG
VG
VG
VG

VG

VG
2000
P1 inlet pressure pu = 2 bar,
outlet pressure pd = 300 mbar,
1000
pressure loss ∆p = pu - pd = 1.7 bar.
800 The result is intersection P1.
600 The next largest nominal size is se-
500
400
lected: VGBF 50..40.
300 At a pressure loss of ∆p = 1.7 bar, the
max. flow rate is Qmax.: 700 m3/h, the
200
min. flow rate is Qmin. derived from
Qmin. = Qmax. x 10% = 70 m3/h.
100
80
60
50
40

30

1 20
10 20 30 40 60 80 100 200 300 400 600 1000 2000 3000 5000
2
20 30 40 60 80 100 200 300 400 600 1000 2000 3000 5000
3
7 8 10 20 30 40 60 80 100 200 300 400 600 1000 2000 3000
4
8 10 20 30 40 60 80 100 200 300 400 600 1000 2000 3000
Qn [m3/h]

 = natural gas (ρ = 0.80 kg/m3)

 = town gas (ρ = 0.64 kg/m3)
 = LPG (ρ = 2.01 kg/m3)
 = air (ρ = 1.29 kg/m3)

VGBF · Edition 08.12 9

5 Selection
Type R F 05 10 40 -1 -3 L V
VGBF 15  – – –   –
VGBF 25  – –    –
VGBF 40      –   
VGBF 50 –     –   
VGBF 65 –   – – –   
VGBF 80 –     –   
VGBF 100 –     –   
VGBF 150 –    – –   
 = standard,  = available
Order example
VGBF 50F05-3

5.1 Type code

Code Description
VGBF Gas pressure regulator
15-150 Nominal size
R Rp internal thread
F Flange to ISO 7005
05 pu max. 500 mbar
10 pu max. 1 bar
40 pu max. 4 bar
-1 Screw plug at the inlet
-3 Screw plug at the inlet and outlet
L For air only (without approval)
V Viton equipment (without approval)

VGBF · Edition 08.12 10

6 Project planning information 6.2 Installation to EN 746-2
6.1 Installation
Safety relief valve
Pressure regulator VSBV
VGBF

Installation position: spring dome pointing vertically upwards,

up to nominal size DN 50 also to the side, but not upside down.

Safety shut-off 5 DN
valve JSAV
> 20 mm

In accordance with EN 746-2, a safety shut-off valve upstream

The gas pressure regulator VGBF must not be in contact with of the gas pressure regulator and a safety relief valve are
masonry. Minimum clearance 20 mm. required for gas pressure control systems.
Do not store or install the unit in the open air. These valves are not required if the highest possible operating
pressure upstream of the regulator cannot exceed the maxi-
VGBF mum allowable operating pressure of the downstream devices.
GFK

Sealing material and dirt, e.g. thread cuttings, must not be

allowed to get into the regulator housing.
Install a filter (GFK) upstream of every system.

VGBF · Edition 08.12 11

7 Accessories
7.1 Damping valve

VGBF..10 and VGBF..40: damping valve for impulse line Rp 3/8.

VGBF 15 – 25: not required,
VGBF 40 – 100..40: loosely enclosed.
Can be ordered on request for VGBF 40 – 150..10.
Order No. 75439215.

VGBF · Edition 08.12 12

8 Technical data
Gas types: natural gas, town gas, LPG (gaseous) and biologi-
cally produced methane (max. 0.02 %-by-vol. H2S), VGBF..05..L
also for air. The medium must be dry in all temperature condi-
tions and must not contain condensate.
Inlet pressure range: up to 500 mbar, 1 bar and 4 bar.
Outlet pressure ranges:
VGBF 15 – 50: 5 – 350 mbar,
VGBF 65, 150: 5 – 160 mbar,
VGBF 80, 100: 5 – 350 mbar.
VGBF..05: Class A.
VGBF..10, VGBF..40:
Accuracy Class: AC 10,
Lock-up pressure class: SG 30.
Ambient temperature:
standard: -15 to +60°C,
VGBF..L/VGBF..V: 0 to +60°C.
Storage temperature:
standard: -15 to +40°C,
VGBF..L/VGBF..V: 0 to +40°C.
Valve housing: aluminium,
valve seat and stem: aluminium.
Diaphragms:
standard: Perbunan,
VGBF..L: Perbunan, Viton,
VGBF..V: Viton.
Valve disc:
standard, VGBF..L: Perbunan,
VGBF..V: Viton.
Internal thread: Rp to ISO 7-1.
Flanged connection: PN 16 to ISO 7005.

VGBF · Edition 08.12 13

Technical data

8.1 Dimensions

øD
øD

øD

Rp 3/8
Rp 3/8 H1 (1 bar,
H1
4 bar)
H1 pd
Rp 1/4 pu
pd D2 k
pu d2
H2 H2
pu L
H2 L
L

VGBF 15R, VGBF 25R VGBF 40R VGBF 40 – 150F

8.2 Data table

Type Dimensions pu max. Flange Drilling Weight
L H1 H2 D
DN Connection mm mm mm mm bar D2 k d2 No. kg
VGBF 15R 15 Rp ½ 70 151 24 132 4 – – – – 0.9
VGBF 25R 25 Rp 1 90 250 33 190 1; 4 – – – – 1.9
VGBF 40R 40 Rp 1½ 150 260 56 190 1; 4 – – – – 2.9
VGBF 40F 40 40 200 260 75 190 0.5; 1; 4 150 110 18 4 4.8
VGBF 50F 50 50 230 316 83 240 0.5; 1; 4 165 125 18 4 7.7
VGBF 65F 65 65 290 412 89 260 0.5 185 145 18 4 12.0
VGBF 80F 80 80 310 446 100 310 0.5; 1; 4 200 160 18 8 16.1
VGBF 100F 100 100 350 501 115 396 0.5; 1; 4 229 180 18 8 26.0
VGBF 150F 150 150 480 573 150 520 0.5; 1 285 240 22 8 46.5

VGBF · Edition 08.12 14

Technical data

8.3 Spring table

Outlet pressure Marking Order No.
range
VGBF 25
[mbar] VGBF 15 VGBF 40 VGBF 50 VGBF 65 VGBF 80 VGBF 100 VGBF 150
5 – 12.5 – 75421911 75421961 75422031 75426160 75426230 75426310 75426450
10 – 30 red 75421921 75421971 75422041 75426170 75426240 75426320 75426460
25 – 45 yellow 75421931 75421980 75422051 75426180 75426250 75426330 75426470
40 – 60 green 75421941 75421990 75422061 75426190 75426260 75426340 75426480
55 – 75 blue 75421951 75422000 75422071 75426200 75426270 75426350 75426490
70 – 90 black 75442046 75422010 75422081 75426210 75426280 75426360 75426500
85 – 105 white 75442047 75422020 75422091 75426220 75426290 75426370 75426510
100 – 160 black/red 75442048 75438978 75438981 75446329 75438984 75438987 75438990
150 – 230 black/yellow 75442049 75438979 75438982 – 75438985 75438988 –
220 – 350 black/green 75442050 75438980 75438983 – 75438986 75438989 –
Dispatch complete with label for changed outlet pressure.

VGBF · Edition 08.12 15

9 Maintenance cycles
At least once a year, at least twice a year in the case of bio-
logically produced methane.

VGBF · Edition 08.12 16

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Remarks

Kromschröder AG

Michael Rehkamp
m.rehkamp@kromschroeder.com
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Osnabrück

Contact
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VGBF · Edition 08.12 17