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Pilot RMG 630a, RMG 640

General Description

630.00 640.00 Edition 03/2003

Serving the Gas Industry - WORLDWIDE

Pilot RMG 630a, RMG 640 Application • pilot for gas pressure regulators RMG 402, RMG 502, RMG 503, RMG 505 • suitable for natural gas and all non-corrosive gaseous media

Characteristics • one-stage or two-stage pilot composed of interchangeable cartridge assemblies • the two-stage version ensures a high regulating accuracy even under high inlet pressure changes • equipped with inlet pressure (load limiting pressure) gauges, with or without outlet pressure gauge as an optional feature, and fine filter RMG 905 • can be provided with electric remote setpoint adjustment as an optional feature

1. Technical data max. inlet pressure pemax

100 bar

RMG 630a

• two-stage version • for high regulating accuracy • adjustment range (see page no. 3)

RMG 640

• one-stage version • application at inlet pressure changes: pe ≤ 15 bar • adjustment range (see page no. 3)

weights

pilot type RMG 630a RMG 640

materials

1 bar 6.0 kg 4.0 kg

body internal parts diaphragms sealings

adjustment range Wh up to 40 bar 90 bar 5.0 kg 6.5 kg 3.5 kg 4.5 kg aluminium alloy aluminium alloy/steel rubber-like plastic material (NBR) rubber-like plastic material (NBR)

accuracy class (AC) and lock-up pressure class (SG) - RMG 630a

AC ≥ 2.5

SG ≥ 10

- RMG 640

AC ≥ 5

SG ≥ 10

lock-up pressure zone class (SZ)

SZ 2.5

temperature range

-20°C ... +60°C (class 2)

function and strength

according to EN 334

DIN-DVGW registration

the pilots are components of the regulators

CE/PED

approved

2

pilot RMG 630a, RMG 640 2. Adjustment ranges pilot RMG 630a adjustment range Wa control stage

setpoint spring no. colour

wire dia. in mm

special feature

0.15 ... 1 bar 1 ... 5 bar 2 ... 10 bar 5 ... 20 bar 10 ... 40 bar 20 ... 90 bar load limiting stage 5 ... 15 bar

1 2 3 4 5 6

black yellow brown red green white

4.5 5.6 6.3 7.0 8.0 9.0

green

5.0

larger measuring diaphragm control stage with diaphragm assembly control stage with diaphragm assembly control stage with diaphragm assembly control stage with diaphragm assembly control stage with metal harmonica type measuring unit automatically > pa

pilot RMG 640 (one stage version, for inlet pressure ∆p ≤ 15 bar) adjustment range Wa control stage

setpoint spring no. colour

wire dia. in mm

0.15 1 2 5 10 20

1 2 3 4 5 6

4.5 5.6 6.3 7.0 8.0 9.0

... 1 bar ... 5 bar ... 10 bar ... 20 bar ... 40 bar ... 90 bar

black yellow brown red green white

special feature larger measuring diaphragm control stage with diaphragm assembly control stage with diaphragm assembly control stage with diaphragm assembly control stage with diaphragm assembly control stage with metal harmonica type measuring unit

3

Pilot RMG 630a, RMG 640 3. Dimensions RMG 630a adjustment range Wa =(0.15...1) bar connection for measuring line: without pressure gauge pa

with pressure gauge pa

N

3

1

A

B

2

C D

I

O

5

H

M

1

3

4

E

F

E G

RMG 630a adjustment range Wh =(1...90) bar connection for measuring line: with pressure gauge pa

Wa = ( 10 ... 40 ) bar

Wh = ( 1 ... 90 ) bar

Wh = ( 1 ... 20 ) bar

Wa = ( 20 ... 90 ) bar

M

without pressure gauge pa

1

K 4

A

3 J

E

F G

4

E

J

L

1 K

D

1

A

B

2

L

C

I

H

5

Pilot RMG 630a, RMG 640 RMG 640 adjusting range Wh=(1...90) bar connection for measuring line: without pressure gauge pa

Wh = ( 1 ... 90 ) bar

with pressure gauge pa

Wa = ( 10 ... 40 ) bar

W = ( 1 ... 20 ) bar

Wa = ( 20 ... 90 ) bar

h

1 2

B

I

C

H

5

D A

1

1

4

A

3

E

F

E

G

Dimensions in mm pilot type

adjusting range

A

B

C

D

E

F

G

RMG 630a

Wa= 0.15...1

bar

195 101 67 101 26 127 225

RMG 630a

Wh =

1...40

bar

195

RMG 630a RMG 640

Wa = 20...90 Wh = 1...40

bar bar

315 195

RMG 640

Wa = 20...90

bar

315

101 67 101 26 127 191 67

30 101 26

60 124

H

I

93 42 36 42 36 24

J

K

L

M

N

O

56

88 230 132

90

24

56

68 209

32 56

75 202 68 209

32

75 202

156

Connections 1 2 3 4 5

measuring line bleed line vent line inlet pressure line loading pressure line

(at outlet pressure line) (at main valve or outlet pressure line) (to the open air) (at inlet pressure line) (at main valve)

E12, thread M 14x1.5 E12, thread M 14x1.5 E12, thread M 14x1.5 E10, thread M 14x1.5 E10, thread M 14x1.5

5

Pilot RMG 630a, RMG 640 4. Design and operation The gas pressure regulator is designed to keep the outlet pressure constant within given limits, independent of disturbing influences like inlet pressure and flow rate changes.

This regulating operation is controlled by the pilot which feeds loading pressure to the main diaphragm to change its opening position for a regulation of the gas flow within the main valve.

The amplifying valve in the double diaphragm system of the control unit is closed at zero flow. Due to the function of the throttling valve upstream of the pilot ensuring pressure compensation, inlet pressure will prevail in the loading pressure chamber above the main diaphragm. The closing spring gives the force to ensure tight shut-off on zero flow.

The valve in the control unit of the pilot reduces the loading pressure to open the regulator (when the two-stage pilot RMG 630a is used, an initial decrease of the load limiting pressure is followed by a reduction of the loading pressure within the loading pressure chamber). The inlet pressure prevailling at the lower side of the main diaphragm moves the diaphragm upwards to set free as much of the slotted valve part as is necessary for outlet pressure control.

load limiting pressure

pilot RMG 630 measuring impulse line

throttling valve

inlet pressure

amplifying valve

outlet pressure inlet pressure

bleed line

load limiting pressure loading pressure atmosphere

vent line

start-up valve

closing spring load limiting stage loading pressure line

filter RMG 905

control stage

loading pressure chamber main control diaphragm

expansion piece main valve body

inlet pressure line

outlet pressure

inlet pressure

6

main valve

Pilot RMG 630a, RMG 640 5. Type description (example) RMG 630a

type

-2

-

So

RMG 630a RMG 640

setpoint spring of pilot control stage setpoint spring no.

1 2 3 4 5 6

setting range Wh in bar 0.15 ... 1 1 ... 5 2 ... 10 5 ... 20 10 ... 40 20 ... 90

special version (is to be specified in detail)

1 2 3 4 5 6 So

7

We supply you with products for gas pressure regulation: RMG REGEL + MESSTECHNIK GMBH Osterholzstrasse 45, D-34123 Kassel, Germany Telephone (++49) 561 5007-0 • Fax (++49) 561 5007 107 gas pressure regulators and safety devices

RMG-GASELAN Regel + Meßtechnik GmbH Julius-Pintsch-Ring 3, D-15517 Fürstenwalde, Germany Telephone (++49) 3361 356-60 • Fax (++49) 3361 356-836 gas pressure regulating equipment, displacement meters, complete stations

Bryan Donkin RMG Gas Controls Ltd. Enterprise Drive, Holmewood, Chesterfield S42 5UZ, England Telephone (++44) 1246 501-501 • Fax (++44) 1246 501-500 gas pressure regulating equipment, underground compact units

Bryan Donkin RMG Canada Ltd. 50 Clarke Street South, Woodstock, Ontario N4S 7Y5, Canada Telephone (++1) 519 5398531 • Fax (++1) 519 5373339 domestic regulators and safety devices

The other RMG Companies RMG Messtechnik GmbH Otto-Hahn-Strasse 5, D-35510 Butzbach, Germany Telephone (++49) 6033 897-0 • Fax (++49) 6033 897-130 turbine meters, vortex meters, correctors, flow computers, odorizers

Karl Wieser GmbH Anzinger Strasse 14, D-85560 Ebersberg, Germany Telephone (++49) 8092 2097-0 • Fax (++49) 8092 2097-10

works Beindersheim Heinrich-Lanz-Strasse 9, D-67259 Beindersheim/Pfalz, Germany Telephone (++49) 6233) 3762-0 • Fax (++49) 6233 3762-40 data logging, monitor systems, danger alarm systems

WÄGA Wärme-Gastechnik GmbH Osterholzstrasse 45, D-34123 Kassel, Germany Telephone (++49) 561 5007-0 • Fax (++49) 561 5007-207 design and assembly of gas pressure regulating and metering stations

Die RMG Group of Companies on the internet: http://www.rmg.de

Serving the Gas Industry - WORLDWIDE

We reserve the right for technical changes!