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SERVING THE GAS INDUSTRY WORLDWIDE

Technical Description

GAS PRESSURE REGULATOR RMG 408

RMG REGEL + MESSTECHNIK GMBH


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GAS PRESSURE REGULATOR RMG 408Application, Characteristics, Technical Data

Application

• for gas supply to municipal distribution systems, industrial and power plants• suitable for outlet pressure control, inlet pressure control, outlet and differential pressure control (flow control)• for natural gas acc. to DVGW G 260, for further gases on request.

Characteristics

• regulator with integrated noise attenuating device• easy maintenance due to interchangeable cartridge (plug-in arrangement)• large inlet pressure range• different valve seat diameters possible

TECHNICAL DATA

max. inlet pressure PS 16 bar

Set range Wd

0.020 to 0.500 barwith pilot RMG 610, measuring unit „N“(RS10d, version „MN“)

with pilot RMG 610, measuring unit „M“(RS10d, version „MM“)

0.100 to 3.500 bar

with pilot RMG 650 1.000 to 15.00 bar

accuracy class (AC) and lock-up pressure class (SG)

0.02 to 0.03 bar>0.03 to 0.10 bar>0.10 to 0.50 bar>0.50 to 2.50 bar>2.50 to 15.0 bar

AC 10AC 10AC 5AC 2.5AC 1

SG 30SG 20SG 10SG 10SG 5

class of lock-up pressure zone SZ 2.5

minimum pressure drop ∆pmin 0.20 to 1.00 bar

type of connection flange PN 16

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GAS PRESSURE REGULATOR 408Application, Characteristics, Technical Data

TECHNICAL DATA

materials

main valve bodymain valve internal partspilotdiaphragmssealings

aluminium alloysteel, aluminium, brassaluminium alloy, steelPerbunan (rubber-like-plastic)Perbunan (rubber-like-plastic)

temperature range class 2 -20 °C to +60 °C

function and strength acc. to DIN EN 334 respectively DIN EN 14382

ex-zoneMechanical components of regulator do not contain a potential ignition source, thus do not fall in limits of ATEX 95 (94/9/EG).(Used electronic accessories comply with ATEX-demands.)

DIN-DVGW-reg.-no. NG - 4101 AS 0161

CE mark acc. to PED

VALVE DATA

size

valve seat diameter

KG valueKG value withmetal sponge

max. inlet pressure pu max for actuator*

in mm in m3/h in m3/h size 1 size 2 size 3

DN 50/100303752

450650

1150 800

1616

10 (16)

161616

DN 80/100375281

75014002400

10001900

161616

DN 100/2005281

102

170034003800

120026503300

1616

10 (16)

161616

*) IMPORTANT: The restriction of the inlet pressure pu max ist not due to to reasons of strength, but serves for control accuracy. The regulating and closing precision categories are stipulated in DVGW type tests. The values are guaranteed under the following conditions: „The inlet pressure may exceed the pu max-figure stated in the table twice its value, at the most limited by nominal pressure level, provided that the inlet pressure changes ∆pu are not higher than the pu max-figure stated in the table.“

Example for DN 50/100 with valve seat diameter 52 mm:

The max. inlet pressure pu max is 10 bar acc. to the table. The highest value is calculated as twice its value of inlet pres-sure pu max = 20 bar, but the pressure rating reduces this value to 16 bar (this value is given in brackets).The permissible inlet pressure deviation of ∆pu = 10 bar can be used as follows:The inlet pressure may deviate e.g. from pu1 = 2 bar to pu2 = 12 bar, or e.g. from pu1 = 6 bar to pu2 = 16 bar in compli-ance with the stipulated regulating and closing precision categories.

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CONTROL DEVICE K4, K5 AND K6 (SAFETY CUT-OFF ACTUATOR TYPE RMG 720)

mea

surin

g un

it

setpoint spring overpressure cut-off* underpressure cut-off*

responseprecisioncategory

**no. colour

wire diam.

in mm

specific setpoint range

Wdso (bar)

min. differential between response

pressure and normal service pressure*

∆pwo (bar)

specificsetpoint range

Wdsu (bar)

min. differential between response

pressure and normal service pressure

∆pwu (bar) AG

K4

23456

bright reddark red

blacklight blue

black

3.23.64.51.11.4

0.040 ... 0.1000.080 ... 0.2500.200 ... 0.500

0.0200.0300.060

0.005 ... 0.0200.015 ... 0.060

0.0100.020

5/2.52.5

2.5/120/5

5

K5

3456

dark redblack

light blueblack

3.64.51.11.4

0.200 ... 0.8000.600 ... 1.500

0.1000.200

0.015 ... 0.0500.040 ... 0.120

0.0300.060

2.52.5/120/5

5

K6

3456

dark redblack

light blueblack

3.64.51.11.4

0.600 ... 2.0001.500 ... 4.500

0.2000.400

0.040 ... 0.1200.120 ... 0.300

0.0600.120

2.52.5/120/5

5

*) Note: if control devices are used with both overpressure and underpressure release, then the min. gap between the two setpoints pdso and pdsu has to be at least 10% larger than the sum of the two differential values (∆pwo + ∆pwu).

pdso - pdsu ≥ 1.1 (∆pwo + ∆pwu)

**) The higher response precision category is valid for the first half, the lower response precision category is valid for the second half of the setting range.

Safety cut-off valveA safety cut-off valve type RMG 720 or RMG 721 can be incorporated in the main valve body optionally and even after-wards. Depending on the required cut-off setpoints the following safety cut-off actuators can be used:

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GAS PRESSURE REGULATOR 408Application, Characteristics, Technical Data

SAFETY CUT-OFF ACTUATORS K10A, K12, K13, K16 AND K17 (SAFETY CUT-OFF VALVE TYPE RMG 721)

mea

surin

g un

it

setpoint spring overpressure cut-off* underpressure cut-off*

responseprecisioncategory

**AGno. colour

wireø

in mm


Who (bar)

min. differential between response pressure and

normal service pressure

∆pwo (bar)


Wdsu (bar)

min. differential between normal service pressure and response pressure

∆pwu (bar)

K10a

1234567

yellowlight reddark red

whitelight blue

whiteblack

3,23,64,5

4,751,11,21,4

0,050 ... 0,1000,080 ... 0,2500,200 ... 0,5000,400 ... 1,500

0,0300,0500,1000,250

0,010 ... 0,0150,014 ... 0,0400,035 ... 0,120

0,0120,0300,060

10/510/55/2,55/2,5

2020/5

5

K12

123456

light greenyellow

light redwhite

light blueblack

5,06,38,02,02,83,6

0,500 ... 1,5001,000 ... 3,0002,000 ... 8,000

0,2500,5001,000

0,100 ... 0,2000,150 ... 0,8000,500 ... 2,000

0,2000,4000,800

5/2,52,5/12,5/1

2010/510/5

K13

23456

yellowlight red

whitelight blue

black

6,38,02,02,83,6

4,000 ... 14,007,000 ... 30,00

2,0004,000

0,500 ... 1,2000,700 ... 3,5001,500 ... 6,000

0,8001,5003,500

2,5/12,5/1

1010/510/5

K16

01234

blueblackgrey

brownred

3,24,55,06,37,0

0,800 ... 1,5001,000 ... 5,0002,000 ... 10,005,000 ... 20,0010,00 ... 40,00

0,1000,2000,4000,8001,200

2,52,5/1

111

K17234

greybrown

red

5,06,37,0

4,000 ... 10,005,000 ... 20,0010,00 ... 40,00

0,4000,8001,200

555

*) Note: if actuators are used with both overpressure and underpressure release, then the min. gap between the two setpoints pdso and pdsu has to be at least 10% larger than the sum of the two differential values ∆pwo und ∆pwu.

pdso - pdsu ≥ 1,1 (∆pwo + ∆pwu)

**) The higher response category (AG) is valid for the first half, the lower one is valid for the second half of the setting range.

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Diagram showing flowrate limitation for best noise reduction

150000

10000080000700006000050000

40000

30000

20000

15000

10000

80007000600050004000

30002500

2000

1500

10001 2 3 4 5 6 7 8 9 10 15 17 20 25 30 40

DN 100/200 DN 80/150

DN 50/100

size

DN u

/ D

N d

flow

rate

lim

itatio

n Q

nl in

m3 /

h

outlet pressure absolute pdn in bar

Example: RMG 408 - 100/200 pdn = 2 bar flowrate limitation Qnlimit = 12500 m3/h

To achieve best results for the noise reducing outlet duct, a certain expansion value in the last expansion stage (at the flow straightener) should be guaranteed. The diagram shows the the permissable flowrate limitation in relation to valve size and absolute outlet pressure pdn.

flowrate limitation normal

flowrate limitation max. permissible

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GAS PRESSURE REGULATOR 408Design and Function

The gas pressure regulator RMG 408 was designed to keep the outlet pressure constant in the main and independent from disturbing influences like inlet pressure and flow rate changes.

The RMG 408 consists of a main body and the units „regulator“ and „safety cut-off valve“ (SAV). The regulator-unit consists of actuator assembly with actuator and main valve and an added pilot with filter. Dissolve fasteners first to remove units of main valve body. By doing this maintenance is easy to perform. The outlet pressure is taken at the measuring point and fed to the pilot regulator. In the pilot regulator the outlet pressure is compared to the adjustable spring loading across the pilot diaphragm, so that any variation in outlet pressure will cause a corresponding change of loading pressure to adjust the valve position accordingly and restore the outlet pressure to the setpoint. The regulator gives tight shut-off on zero flow.

The main valve can be equipped with orifices of various sizes. From valve seat Ø 52 mm on a compensation diaphragm ensures inlet pressure ballance of the main valve of the regulator to a large extend.

In order to avoid high noise emission the main valve is equipped with a perforatet expansion piece which splitts the gas steam up into many thin partial streams moving against one another. For further noise attenuation three concentric perforated plates are located around the outlet of the main valve control ement, thus causing a pressure cut of several stages and again dividing the gas steam into a great number of partial streams. A rectifying cone and filling material are installed in the outlet duct of the main valve to achieve additional noise suppression. Optionally, the perforated expansi-on piece can be fitted with an internal layer of metal foam material, with which an additional noise reduction of at least 10 dB(A) can be achieved. The usual perforated expansion piece can be replaced offhand by a perforated expansion pi-ece with internal layer of metal foam material. Please note that when using the metal foam insert the KG-value (flowrate coefficient) is reduced accordingly (see page 3, table of valve data). The valve plate of the safety cut-off valve (SAV) installed in the inlet side of the body cuts off the gas flow if the outlet pressure rises above or falls below preset limits. The RMG 408 can be equipped with the cut-off units RMG 720 or RMG 721.

The safety cut-off valve can be opened manually if the outlet pressure at measuring point is below (in case of exceeding pressure) or above (in case of undercuting pressure) the re-engagement differential (note that the min. differential between response pressure and normal service pressure is observed, see tables on page 4 and page 5).

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GAS PRESSURE REGULATOR RMG 408Design and Function

RMG 408 with pilot RMG 610 and SSV-system RMG 720

setpoint spring

safety cut-off valveopening knob/position indicator

safety cut-off valvevalve plate

pressurecompensating valve

closing spring

safety cut-off valvemeasuring line

switching valveRMG 919

measuring line

bleed line

loading pressure line

actuator

return line

flow divider

filling material

perforated expansion piece

rectifying cone

main valve body

valve plate

compensating diaphragm

safety cut-off valvemeasuring diaphragm

setpoint adjusterinlet pressure

outlet pressure

loading pressure

loading limiting pressure

atmosphere

pilot RMG 610(RS10d)

safety cut-off system RMG 720

actuator assembly

filter RMG 905

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GAS PRESSURE REGULATOR 408Design and Function

RMG 408 with pilot RMG 610 and safety cut-off valve system RMG 720

setpointspring

setpointadjuster

safety cut-offvalve opening knob/position indicator

safety cut-off valvevalve plate

compensating valve

closing spring

setpoint adjuster

setpoint spring

safety cut-off valvemeasuring line

measuring diaphragm

measuring line

loading line

bleed line

actuator

return line

flow divider

fillingmaterial

perforated ex-pansion piece

rectifyingcone

valve plate

main valvebody

compensating diaphragm

pilotRMG 650

actuatorK16 switching device

safety cut-off valve -systemRMG 721

actuator assembly

filter RMG 905

inlet pressure

outlet pressure

loading pressure

loading limiting pressure

atmosphere

10


MEASUREMENTS IN MM

size main valve bodysafetycut-off

actuator

size 1 size 2 size 3

DNu/DNd A B C D E F G H J K F G H J K F G H J K

50/100 450 125 175 410 315 360 600 308 560 300 420 660 380 680 300

80/150 500 165 165 450 360 380 620 380 650 300

100/200 650 175 245 475 330 445 685 380 750 300 500 750 545 850 300

APPROX. WEIGHTS IN KG

sizeregulator with actuator

size 1 size 2 size 3

DNu/DNd with cut-off without with cut-off without with cut-off without

50/100 51 46 80 75

80/150 81 74

100/200 95 84 102 91

Dimensions

max150

max 90B

A

C

E

DNu

dism

antli

ng s

pace

D

DNd

FG

dism

antli

ng s

pace

J

K

H

11

GAS PRESSURE REGULATOR 408

SIZE

inlet/outlet DNDN 50/100DN 80/150

DN 100/200

50/10080/150

100/200

SAFETY CUT-OFF VALVEtype overpressure cut-off

setpoint range in barunderpressure cut-offsetpoint range in bar

actuator type

RMG 720

0.040 ... 0.5000.200 ... 1.5000.600 ... 4.500

0.005 ... 0.0600.015 ... 0.1200.040 ... 0.300

K4K5K6

RMG 721

0.050 ... 1.5000.500 ... 8.0004.000 ... 17.600.800 ... 17.60

0.010 ... 0.1200.100 ... 2.0000.500 ... 6.000

4.000 ... 16.00

K10aK12K13K16K17

AUSLÖSUNG UND FERNÜBERTRAGUNG

optional: remote safety cut-off releaserelease: - upon current supply- upon current failure (only with RMG721)

E1E2

optional: manual release of safety cut-offfor RMG 720: push-button valve RMG 912for RMG 721: included in system

HA

optional: electric remote signalling of safety cut-off valve position „open/closed“

F

VALVE SEAT DIAMETER AND ACTUATOR SIZEsizeDN

KG-valuein m3/h

max. inlet pressure*in bar

valve seat-Øin mm

actuator size valve actuator

50/100

450650

1150

1616

10 (16)

303752

111

303752

111

450650

1150

161616

303752

222

303752

222

80/150750

14002400

161616

375281

222

375281

222

100/200

170034003800

1616

10 (16)

5281

102

222

5281

102

222

170034003800

161616

5281

102

333

5281

102

333

PILOT

type version setpoint range Wd in bar denomination

RMG 650 1.000 ... 15.00 650RMG 610(RS10d)

N (M/N)M (M/M)

0.020 ... 0.5000.500 ... 3.500

10dM/NM/M

SPECIAL VERSION... to be specified So

*) see table page 3

Ordering Details (Example)

RMG 408 - 50/100 - K4 / E1 /HA / F - 30 / 1 - 10d M N - SpExample:

type DN

safe

ty c

ut-o

ff ty

pe

safe

ty c

ut-o

ff re

mot

e re

leas

esa

fety

cut

-off

man

ual r

elea

se

Elek

trisc

he F

ernü

bert

ragu

ng d

er S

SV-V

entil

stel

lung

valve

sea

t dia

met

er fo

r reg

ulat

or u

nit

actu

ator

for r

egul

ator

uni

t

pilo

t typ

e

mea

surin

g un

it fo

r pilo

t loa

d lim

iting

sta

gem

easu

ring

unit

for p

ilot r

egul

atin

g st

age

spec

ial v

ersi

on

Edition 12/2006 Gas Pressure Regulator RMG 408We reserve the right for technical changes!

WÄGA WÄRME-GASTECHNIK GMBHOsterholzstraße 4534123 KasselPhone +49 (0)561. 5007-0Fax +49 (0)561. 5007-207

RMG-GASELAN REGEL + MESSTECHNIK GMBHJulius-Pintsch-Ring 315517 FürstenwaldePhone +49 (0)3361. 356-60 Fax +49 (0)3361. 356-836

CANADA

BRYAN DONKIN RMG CANADA LTD.50 Clarke Street South, WoodstockOntario N4S 7Y5, CanadaPhone +1. 519 53 98 531 Fax +1. 519 53 73 339

GERMANY

RMG REGEL + MESSTECHNIK GMBHOsterholzstraße 4534123 Kassel, GermanyPhone +49 (0)561. 5007-0Fax +49 (0)561. 5007-107

RMG MESSTECHNIK GMBHOtto-Hahn-Straße 535510 Butzbach, GermanyPhone +49 (0)6033. 897-0Fax +49 (0)6033. 897-130Works Ebersberg:- Software development -Anzinger Straße 585560 Ebersberg, GermanyPhone +49 (0)8092. 20 97-0Fax +49 (0)8092. 20 97-10

ENGLAND

BRYAN DONKIN RMG GAS CONTROLS LTD.Enterprise Drive, HolmewoodChesterfi eld S42 5UZ, EnglandPhone +44. 12 46 501-501 Fax +44. 12 46 501-500

POLAND

GAZOMET SP. Z O.O.ul. Sarnowska 263-900 Rawicz, PolandPhone +48. 65 546 24 01 Fax +48. 65 546 24 08

RMG is your worldwide partner for gas control equip-ment, ranging from exploration to consumer supply. The comprehensive range of RMG products and systems pro-vides you with a total solution for all your gas control and measurement needs. Modern manufacturing techniques combined with our expertise and specialist knowledge in

the design and build of gas control equipment, including fully automated stations has earned RMG a worldwide re-putation for supply of safe, accurate and reliable equip-ment. RMG ... Welcomes the opportunity to meet your business requirements.

SERVING THE GAS INDUSTRY WORLDWIDE

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