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We supply you with products for gas pressure regulation:

Pilot RMG 640

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, below ground gas control modules

Bryan Donkin RMG Co. of 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

Betriebsstelle 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

Operation and Maintenance, Spare Parts

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

Serving the Gas Industry - WORLDWIDE

We reserve the right for technical changes

Serving the Gas Industry - WORLDWIDE

640.20 edition 05/1994


640.20 p.02

640.20 p.15


1. General In addition to this leaflet 640.20 concerning "Special Operating Instruction, Maintenance and Spare Parts" of the pilot RMG 640, the brochure 640.00 gives full information about all relevant technical data, description of function, the available versions, and dimensions. Relevant technical data can also be obtained from the latest RMG booklet. Please also refer to the leaflets of the main valve the pilot is connected to. The RMG brochure "General Operating Instructions for Gas Pressure Regulators and Safety Devices" will be useful to fit the safety device into the line, put it into service and find faults that might disturb its operation. Please also check if the construction, set-up, supervision and maintenance of gas pressure regulating stations may be subject to special national regulations. These technical rules should be observed strictly (Within Germany observe the DVGW worksheets G 490, G 491, G 495). The frequency of periodical maintenance of gas pressure regulators and other components of the regulating line is strongly dependant on the prevailing service conditions, the type and composition of the gaseous medium, the ambient temperature and on dust and dirt withing the pipe system. We therefore abstain from imposing any fixed intervals and would rather advise testing out the necessary maintenance intervals, starting with short gaps for maintenance dismantling, and then increasing the intervals if there are no damages or signs of wear. For maintenance all parts are to be cleaned and subjected to a thorough visual inspection. Complete dismantling together with visual inspection should not be omitted when the course of operation or performance tests have shown lack of accuracy. Particular care should be given to the checking of sealings and diaphragms, as well as the closing spring and all movable parts. Damaged parts should be replaced by new ones. The item numbers referred to in the maintenance instructions are identical with those of of the spare parts drawings and of the spare parts lists. We recommend to keep all parts that are specially marked in the spare parts lists in stock for prompt maintenance availability.

2. Special operating instructions 2.1 Start-up valve The gas pressure regulators RMG 402, RMG 502 and RMG 503 are fitted with a start-up valve. This valve enables a quick pressure compensation at the regulating diaphragm, making the first pressurization.

• Open the start-up valve before pressurization. • After pressurization close the start-up valve again.

2.2 Adjusting the dosing screw The dosing screw has a basic setting by RMG and in most cases needs no further adjustment. For reduction of the amplification and to reduce instable regulating behaviour turn the dosing screw anti-clockwise (max. 3 turns).

640.20 p.14

640.20 p.03


Basic diagram of the pilot RMG 640 with a main valve inlet pressure gauge dosing screw start-up valve

4.5 Spare Parts List RMG 640 control unit with diaphragm measuring system outlet pressure gauge

inlet pressure pe

measuring line

setpoint adjusting screw for outlet pressure connection for the bleed line with RMG 502 / RMG 503

outlet pressure pa

3. Special maintenance instructions pre-formed diaphragm (119, 169) When fitting the diaphragm take care of the correct mounting position of the loop. (See spare parts drawings of the outlet pressure stage, pages 10, 12)

no.

description

151

cover

152*

piston, pre-assembled

153

spring

154

diaphragm plate

155*

o-ring

156*

valve insert

157

grooved dowel pin

158

union piece

159

spring housing

LM

10 011 767

160

guiding pin

St

10 011 772

161

spring plate

NSt

10 011 774

162

spring

FSt

10 010 444

163

axial disk (2 pcs.)

St

00 026 385

164

axial needle bearing

St

00 026 384

165

cylinder screw

St

00 010 548

166

washer

St

00 008 279

167

locking cap

168*

o-ring

169*

pre-formed diaphragm

EV

KG

10 000 191

170*

sealing insert

EV

KG

10 000 066

171

valve body

LM

10 011 769

172*

o-ring

EV

KG

00 020 416

173

metal harmonica, complete

174*

o-ring

175 176 180*

o-ring

181

plate

182 183 184*

hexagon collar nut

185

hexagon screw

diaphragm plate (107, 154)

adjusting the diaphragm system (119)

640.20 p.04

EV*

material

valve seat 3 mm

LM

10 011 768

EV

NFSt/NSt/KV

10 000 186

NSF

10 010 463

LM

10 000 110

EV

KG

00 020 225

EV

LM

10 011 775

St

00 017 197

NSt

10 011 773

EV

NSt

10 000 188

KG

00 020 332

NSt/St

10 011 764

KG

00 020 317

washer

St

00 006 157

cylinder screw

St

00 010 318

KG

00 020 293

St

10 011 770

washer

St

00 008 279

cylinder screw

St

00 010 097

EV

EV

EV

St/K

00 013 145

NSt

10 010 447

for connection to electric actuator

When tightening the closing cap (103, 167) and the hexagonal nut (123), secure the diaphragm plate against distortion with a spanner size SW 24.

For correct fitting of the diaphragm system into the valve body bring the cross hole of the union piece (122) and the valve body (121) in alignment: Turn the diaphragm system clockwise and anticlockwise to the stop, and mark these positions with a pencil. Them turn the diaphragm system into the middle position.

RMG part no. for

breathing line

bleed line connection for the inlet pressure line with RMG 502 / RMG 503

item

pencilmarks: for the stops for the central position adjusting movement valve body diaphragm hexagon nut

190

spring plate

LM

10 011 795

191

ring

LM

10 021 766

192*

sealing

193

plate, complete

194 195 196*

o-ring

197

clutch device, pre-assembled

EV

K

10 021 765

St/AlBz

10 000 079

washer

St

00 014 156

cylinder screw

St

00 010 150

KG

00 020 326

St/NSt

10 010 538

EV

*) parts marked with an asterisk (*) and with EV are to be kept in stock for maintenance material key St

... steel

LM

... light metal

K

... plastic material

FSt

... spring steel

Ms

... brass

KG

... rubber-like plastic material

NSt

... stainless steel

PGl

... plexiglass

AlBz ... aluminium bronze

640.20 p.13


4.6 Spare Parts Drawing RMG 640 control unit with metal harmonica type measuring system

Union piece (158) Grease the threaded plug of the completely assembled union piece with LOCTITE and screw it into the metal harmonica connection piston (173) so that the cross hole of the union piece is positioned 0.5 mm to 1 mm below the valve body cross hole (171). Attention: Both cross holes must be in alignment

Valve insert (105, 156) Use the adjusting screw (124, 185) to get the diaphragm system in a position that will allow the valve insert to be fitted.

Base plate (1) The connecting sides of the load limiting and the control unit base plate must be in alignment.

Spindle (25) of the amplifying valve For finding the basic adjustment of the amplifying valve turn the spindle (25) until the spindle groove (filled with black) comes in line with the front edge of the sleeve (27) fixed into the guiding screw (26).

Torques table item no.

torque MA in Nm

176 11, 114, 115, 165, 183 103, 123, 167

6 12 20

Table of lubricants standard version

for connection to electric actuator

item (to be greased slightly)

lubricant

RMG part no.

all o-rings, all sliding surfaces

silicone grease

00 027 081

spring plate recesses (13, 108, 161) threads of cover (112) threads of plate (181)

fitting paste

00 027 091

all fastenings and pipe screw connections

high duty grease

00 027 058

item (to be covered slightly)

screw locking

RMG part no.

thread of locking cap (103, 167) thread of hexagon nut (123) thread of union piece (122, 158)

LOCTITE

00 026 688

Screw locking

* parts marked with asterisk to be kept in stock for maintenance

640.20 p.12

640.20 p.05


4.5 Spare Parts List RMG 640 control unit with diaphragm measuring system

4. Spare Parts 4.1 Spare Parts Drawing RMG 640 outlet pressure range Wh 1 bar to 40 bar with diaphragm type measuring unit

item optional without / with outlet pressure gauge

RMG part no. for

no.

description

EV*

material

valve seat 3 mm

101

cover

102

pressure spring

LM

10 000 190

NFSt

10 010 463

103

locking cap

NSt

10 000 188

104*

o-ring

EV

KG

00 020 225

105*

valve insert

EV

LM

10 000 061

106

grooved dowel pin

St

00 017 197

107

diaphragm plate

LM

10 000 110

108

spring plate

LM

109

spring

FSt

110

spring housing

LM

drawings with outlet pressure gauge for:

overpressure protection see 925.20

drawing for top without outlet pressure gauge:

EV

10 000 062

111*

sealing ring

113

washer

115

hexagon screw

117*

piston, pre-assembled

EV

118*

o-ring

EV

KG

00 020 332

119*

pre-formed diaphragm

EV

KG

10 000 191

120*

sealing insert

EV

KG

10 000 066

121

valve body

LM

10 000 137

122

union piece

NSt

10 000 108

123

hexagon nut

St

00 013 114

130

o-ring

St

10 000 116

131

washer

St

00 008 279

132

hexagonal screw

133*

hexagonal nut

134

hexagonal screw

EV

K

10 000 100

St

00 008 279

St

00 010 377

NFSt/NSt/KV

10 000 186

St

00 006 493

St/K

00 013 136

NSt

10 002 795

St/AlBz

10 000 079

for connection to electric actuator: sketch without filter and inlet connection filter see 905.20

control unit see page 10

(without filter and inlet connection)

136

plate, pre-assembled

137

washer

St

00 014 146

138

cylindrical screw

St

00 010 150

139

clutch device, pre-assembled

140*

o-ring

EV

St/NSt

10 010 538

KG

00 020 326

adjustable amplifying valve

*) parts marked with an asterisk (*) and with EV are to be kept in stock for maintenance material key *) parts marked by an asterisk are to be kept in stock for maintenance

640.20 p.06

St

... steel

LM

... light metal

K

... plastic material

FSt

... spring steel

Ms

... brass

KG

... rubber-like plastic material

NSt

... stainless steel

PGl

... plexiglass

AlBz ... aluminium bronze

640.20 p.11


4.4 Spare Parts Drawing RMG 640 control unit with diaphragm measuring system

4.2 Spare Parts Drawing RMG 640 outlet pressure range Wh 20 bar to 90 bar with metal harmonica type measuring unit optional without / with outlet pressure gauge drawing with outlet pressure gauge:

drawing for top without outlet pressure gauge:

standard version

filter see 905.20

for connection to electric actuator

control unit see page 12

opened

sketch without filter and inlet connection

(without filter and inlet connection)

adjustable amplifying valve

* parts marked with asterisk to be kept in stock for maintenance *) parts marked by an asterisk are to be kept in stock for maintenance

640.20 p.10

640.20 p.07


4.3 Spare Parts List RMG 640 (contd.)

4.3 Spare Parts List RMG 640 item

RMG part no. for RMG part no. for

no.

description

1 2

EV*

material

1 bar ... 40 bar

20 bar ... 90 bar

base plate

LM

10 011 749

10 011 749

screwed socket

St

00 030 111

00 030 111

item no.

RMG part no. for RMG part no. for description

EV*

material

1 bar ... 40 bar

20 bar ... 90 bar

optional without or with outlet pressure gauge without outlet pressure gauge

3

cap nut

St

00 030 803

00 030 803

30

4

cutting ring

St

00 030 903

00 030 903

31

cutting ring

St

00 030 904

00 030 904

32

screwed socket

St

10 009 683

10 009 683

00 026 314

33

dosing screw dia. 0.5 mm

34*

washer

5

pressure gauge, optional: for pressure rating PN 16

NSt/Ms

for pressure rating PN 25/ANSI 150

NSt/Ms

00 026 284

for pressure rating PN 40

NSt/Ms

00 026 282

for pressure rating ANSI 300

NSt/Ms

00 026 283

00 026 285

for pressure rating ANSI 600

NSt/Ms

00 026 285

00 026 285

cap nut

St

00 030 804

00 030 804

EV

Ms

10 014 015

10 014 015

LM

00 018 842

00 018 842

with outlet pressure gauge for Wh 1 bar to 20 bar 35

outlet pressure gauge, optional:

6

screwed socket

St

00 031 810

00 031 810

with measuring range Wh 1

bar to 5 bar

NSt/Ms

00 026 281

7

screwed socket

St

00 031 609

00 031 609

with measuring range Wh 2

bar to 10 bar

NSt/Ms

00 026 314

with measuring range Wh 5

bar to 20 bar

NSt/Ms

00 026 284

St

00 031 810

8

locking cone

9*

sealing ring

EV

St

00 032 004

00 032 004

LM

00 018 842

00 018 842

36

screwed socket

37

overpressure protection, optional:

10

washer

St

00 008 279

00 008 279

11

hexagonal nut

St

00 010 024

00 010 024

for Wh 1

bar to 5 bar

10 023 336

00 032 101

for Wh 2

bar to 10 bar

10 023 337

for Wh 5

bar to 20 bar

12

straight pipe

13

spring plate, optional:

14

St

for Wh 1

bar to 10 bar

LM

10 000 114

38

for Wh 5

bar to 40 bar

LM

10 000 148

39

screwed socket

40*

cutting ring

spring, optional:

dosing screw dia. 0.5 mm

10 023 338

EV

Ms

10 014 015

St

10 000 714

LM

00 018 842

NSt/Ms

00 026 282

00 026 285

St

00 031 810

00 031 810

for Wh

1 bar to 5 bar (yellow)

FSt

10 000 063

for Wh

2 bar to 10 bar (brown)

FSt

10 000 115

for Wh

5 bar to 20 bar (red)

FSt

10 000 064

41

outlet pressure gauge

FSt

10 000 149

42

screwed socket

St

00 026 175

00 026 175

43

screwed socket

St

00 030 455

00 030 455

cap nut

St

00 030 804

00 030 804

for Wh 10 bar to 40 bar (green) 15

00 032 101

locking screw

with outlet pressure gauge for Wh 10 bar to 90 bar

16

screwed socket

St

00 030 074

00 030 074

44

17

cap nut

St

00 030 804

00 030 804

45

cutting ring

St

00 030 904

00 030 904

straight piece of pipe

St

00 032 141

00 032 141

18

cutting ring

St

00 030 904

00 030 904

46

19

washer

LM

10 010 479

10 010 479

47

dosing screw dia. 0.5 mm

Ms

10 014 015

10 014 015

screwed socket

St

10 009 683

10 009 683

sealing ring

LM

00 018 842

00 018 842

20*

o-ring (1 piece)

EV

KG

00 020 231

00 020 231

48

21*

o-ring (4 pieces)

EV

KG

00 020 225

00 020 225

49*

22*

safety ring

EV

FSt

00 019 065

00 019 065

23*

o-ring (1 piece)

EV

KG

00 020 283

00 020 283

24*

o-ring (1 piece)

EV

25

threaded rod

26

guiding screw

Ms

10 000 144

10 000 144

27

sleeve

PGl

10 000 171

10 000 171

28

protective cap

K

00 026 343

00 026 343

KG

00 020 332

00 020 332

NSt

10 000 145

10 000 145

EV

*) parts marked with an asterisk (*) and with EV are to be kept in stock for maintenance

*) parts marked with an asterisk (*) and with EV are to be kept in stock for maintenance

material key

material key

St

... steel

LM

... light metal

FSt

... spring steel

Ms

... brass

NSt

... stainless steel

PGl

... plexiglass

640.20 p.08

K KG

... plastic material

St

... steel

LM

... light metal

K

... plastic material

... rubber-like plastic material

FSt

... spring steel

Ms

... brass

KG

... rubber-like plastic material

NSt

... stainless steel

PGl

... plexiglass

640.20 p.09


4.3 Spare Parts List RMG 640 (contd.)

4.3 Spare Parts List RMG 640 item

RMG part no. for RMG part no. for

no.

description

1 2

EV*

material

1 bar ... 40 bar

20 bar ... 90 bar

base plate

LM

10 011 749

10 011 749

screwed socket

St

00 030 111

00 030 111

item no.

RMG part no. for RMG part no. for description

EV*

material

1 bar ... 40 bar

20 bar ... 90 bar

optional without or with outlet pressure gauge without outlet pressure gauge

3

cap nut

St

00 030 803

00 030 803

30

4

cutting ring

St

00 030 903

00 030 903

31

cutting ring

St

00 030 904

00 030 904

32

screwed socket

St

10 009 683

10 009 683

00 026 314

33

dosing screw dia. 0.5 mm

34*

washer

5

pressure gauge, optional: for pressure rating PN 16

NSt/Ms

for pressure rating PN 25/ANSI 150

NSt/Ms

00 026 284

for pressure rating PN 40

NSt/Ms

00 026 282

for pressure rating ANSI 300

NSt/Ms

00 026 283

00 026 285

for pressure rating ANSI 600

NSt/Ms

00 026 285

00 026 285

cap nut

St

00 030 804

00 030 804

EV

Ms

10 014 015

10 014 015

LM

00 018 842

00 018 842

with outlet pressure gauge for Wh 1 bar to 20 bar 35

outlet pressure gauge, optional:

6

screwed socket

St

00 031 810

00 031 810

with measuring range Wh 1

bar to 5 bar

NSt/Ms

00 026 281

7

screwed socket

St

00 031 609

00 031 609

with measuring range Wh 2

bar to 10 bar

NSt/Ms

00 026 314

with measuring range Wh 5

bar to 20 bar

NSt/Ms

00 026 284

St

00 031 810

8

locking cone

9*

sealing ring

EV

St

00 032 004

00 032 004

LM

00 018 842

00 018 842

36

screwed socket

37

overpressure protection, optional:

10

washer

St

00 008 279

00 008 279

11

hexagonal nut

St

00 010 024

00 010 024

for Wh 1

bar to 5 bar

10 023 336

00 032 101

for Wh 2

bar to 10 bar

10 023 337

for Wh 5

bar to 20 bar

12

straight pipe

13

spring plate, optional:

14

St

for Wh 1

bar to 10 bar

LM

10 000 114

38

for Wh 5

bar to 40 bar

LM

10 000 148

39

screwed socket

40*

cutting ring

spring, optional:

dosing screw dia. 0.5 mm

10 023 338

EV

Ms

10 014 015

St

10 000 714

LM

00 018 842

NSt/Ms

00 026 282

00 026 285

St

00 031 810

00 031 810

for Wh

1 bar to 5 bar (yellow)

FSt

10 000 063

for Wh

2 bar to 10 bar (brown)

FSt

10 000 115

for Wh

5 bar to 20 bar (red)

FSt

10 000 064

41

outlet pressure gauge

FSt

10 000 149

42

screwed socket

St

00 026 175

00 026 175

43

screwed socket

St

00 030 455

00 030 455

cap nut

St

00 030 804

00 030 804

for Wh 10 bar to 40 bar (green) 15

00 032 101

locking screw

with outlet pressure gauge for Wh 10 bar to 90 bar

16

screwed socket

St

00 030 074

00 030 074

44

17

cap nut

St

00 030 804

00 030 804

45

cutting ring

St

00 030 904

00 030 904

straight piece of pipe

St

00 032 141

00 032 141

18

cutting ring

St

00 030 904

00 030 904

46

19

washer

LM

10 010 479

10 010 479

47

dosing screw dia. 0.5 mm

Ms

10 014 015

10 014 015

screwed socket

St

10 009 683

10 009 683

sealing ring

LM

00 018 842

00 018 842

20*

o-ring (1 piece)

EV

KG

00 020 231

00 020 231

48

21*

o-ring (4 pieces)

EV

KG

00 020 225

00 020 225

49*

22*

safety ring

EV

FSt

00 019 065

00 019 065

23*

o-ring (1 piece)

EV

KG

00 020 283

00 020 283

24*

o-ring (1 piece)

EV

25

threaded rod

26

guiding screw

Ms

10 000 144

10 000 144

27

sleeve

PGl

10 000 171

10 000 171

28

protective cap

K

00 026 343

00 026 343

KG

00 020 332

00 020 332

NSt

10 000 145

10 000 145

EV

*) parts marked with an asterisk (*) and with EV are to be kept in stock for maintenance

*) parts marked with an asterisk (*) and with EV are to be kept in stock for maintenance

material key

material key

St

... steel

LM

... light metal

FSt

... spring steel

Ms

... brass

NSt

... stainless steel

PGl

... plexiglass

640.20 p.08

K KG

... plastic material

St

... steel

LM

... light metal

K

... plastic material

... rubber-like plastic material

FSt

... spring steel

Ms

... brass

KG

... rubber-like plastic material

NSt

... stainless steel

PGl

... plexiglass

640.20 p.09


4.4 Spare Parts Drawing RMG 640 control unit with diaphragm measuring system

4.2 Spare Parts Drawing RMG 640 outlet pressure range Wh 20 bar to 90 bar with metal harmonica type measuring unit optional without / with outlet pressure gauge drawing with outlet pressure gauge:

drawing for top without outlet pressure gauge:

standard version

filter see 905.20

for connection to electric actuator

control unit see page 12

opened

sketch without filter and inlet connection

(without filter and inlet connection)

adjustable amplifying valve

* parts marked with asterisk to be kept in stock for maintenance *) parts marked by an asterisk are to be kept in stock for maintenance

640.20 p.10

640.20 p.07


4.5 Spare Parts List RMG 640 control unit with diaphragm measuring system

4. Spare Parts 4.1 Spare Parts Drawing RMG 640 outlet pressure range Wh 1 bar to 40 bar with diaphragm type measuring unit

item optional without / with outlet pressure gauge

RMG part no. for

no.

description

EV*

material

valve seat 3 mm

101

cover

102

pressure spring

LM

10 000 190

NFSt

10 010 463

103

locking cap

NSt

10 000 188

104*

o-ring

EV

KG

00 020 225

105*

valve insert

EV

LM

10 000 061

106

grooved dowel pin

St

00 017 197

107

diaphragm plate

LM

10 000 110

108

spring plate

LM

109

spring

FSt

110

spring housing

LM

drawings with outlet pressure gauge for:

overpressure protection see 925.20

drawing for top without outlet pressure gauge:

EV

10 000 062

111*

sealing ring

113

washer

115

hexagon screw

117*

piston, pre-assembled

EV

118*

o-ring

EV

KG

00 020 332

119*

pre-formed diaphragm

EV

KG

10 000 191

120*

sealing insert

EV

KG

10 000 066

121

valve body

LM

10 000 137

122

union piece

NSt

10 000 108

123

hexagon nut

St

00 013 114

130

o-ring

St

10 000 116

131

washer

St

00 008 279

132

hexagonal screw

133*

hexagonal nut

134

hexagonal screw

EV

K

10 000 100

St

00 008 279

St

00 010 377

NFSt/NSt/KV

10 000 186

St

00 006 493

St/K

00 013 136

NSt

10 002 795

St/AlBz

10 000 079

for connection to electric actuator: sketch without filter and inlet connection filter see 905.20

control unit see page 10

(without filter and inlet connection)

136

plate, pre-assembled

137

washer

St

00 014 146

138

cylindrical screw

St

00 010 150

139

clutch device, pre-assembled

140*

o-ring

EV

St/NSt

10 010 538

KG

00 020 326

adjustable amplifying valve

*) parts marked with an asterisk (*) and with EV are to be kept in stock for maintenance material key *) parts marked by an asterisk are to be kept in stock for maintenance

640.20 p.06

St

... steel

LM

... light metal

K

... plastic material

FSt

... spring steel

Ms

... brass

KG

... rubber-like plastic material

NSt

... stainless steel

PGl

... plexiglass

AlBz ... aluminium bronze

640.20 p.11


4.6 Spare Parts Drawing RMG 640 control unit with metal harmonica type measuring system

Union piece (158) Grease the threaded plug of the completely assembled union piece with LOCTITE and screw it into the metal harmonica connection piston (173) so that the cross hole of the union piece is positioned 0.5 mm to 1 mm below the valve body cross hole (171). Attention: Both cross holes must be in alignment

Valve insert (105, 156) Use the adjusting screw (124, 185) to get the diaphragm system in a position that will allow the valve insert to be fitted.

Base plate (1) The connecting sides of the load limiting and the control unit base plate must be in alignment.

Spindle (25) of the amplifying valve For finding the basic adjustment of the amplifying valve turn the spindle (25) until the spindle groove (filled with black) comes in line with the front edge of the sleeve (27) fixed into the guiding screw (26).

Torques table item no.

torque MA in Nm

176 11, 114, 115, 165, 183 103, 123, 167

6 12 20

Table of lubricants standard version

for connection to electric actuator

item (to be greased slightly)

lubricant

RMG part no.

all o-rings, all sliding surfaces

silicone grease

00 027 081

spring plate recesses (13, 108, 161) threads of cover (112) threads of plate (181)

fitting paste

00 027 091

all fastenings and pipe screw connections

high duty grease

00 027 058

item (to be covered slightly)

screw locking

RMG part no.

thread of locking cap (103, 167) thread of hexagon nut (123) thread of union piece (122, 158)

LOCTITE

00 026 688

Screw locking

* parts marked with asterisk to be kept in stock for maintenance

640.20 p.12

640.20 p.05


Basic diagram of the pilot RMG 640 with a main valve inlet pressure gauge dosing screw start-up valve

4.5 Spare Parts List RMG 640 control unit with diaphragm measuring system outlet pressure gauge

inlet pressure pe

measuring line

setpoint adjusting screw for outlet pressure connection for the bleed line with RMG 502 / RMG 503

outlet pressure pa

3. Special maintenance instructions pre-formed diaphragm (119, 169) When fitting the diaphragm take care of the correct mounting position of the loop. (See spare parts drawings of the outlet pressure stage, pages 10, 12)

no.

description

151

cover

152*

piston, pre-assembled

153

spring

154

diaphragm plate

155*

o-ring

156*

valve insert

157

grooved dowel pin

158

union piece

159

spring housing

LM

10 011 767

160

guiding pin

St

10 011 772

161

spring plate

NSt

10 011 774

162

spring

FSt

10 010 444

163

axial disk (2 pcs.)

St

00 026 385

164

axial needle bearing

St

00 026 384

165

cylinder screw

St

00 010 548

166

washer

St

00 008 279

167

locking cap

168*

o-ring

169*

pre-formed diaphragm

EV

KG

10 000 191

170*

sealing insert

EV

KG

10 000 066

171

valve body

LM

10 011 769

172*

o-ring

EV

KG

00 020 416

173

metal harmonica, complete

174*

o-ring

175 176 180*

o-ring

181

plate

182 183 184*

hexagon collar nut

185

hexagon screw

diaphragm plate (107, 154)

adjusting the diaphragm system (119)

640.20 p.04

EV*

material

valve seat 3 mm

LM

10 011 768

EV

NFSt/NSt/KV

10 000 186

NSF

10 010 463

LM

10 000 110

EV

KG

00 020 225

EV

LM

10 011 775

St

00 017 197

NSt

10 011 773

EV

NSt

10 000 188

KG

00 020 332

NSt/St

10 011 764

KG

00 020 317

washer

St

00 006 157

cylinder screw

St

00 010 318

KG

00 020 293

St

10 011 770

washer

St

00 008 279

cylinder screw

St

00 010 097

EV

EV

EV

St/K

00 013 145

NSt

10 010 447

for connection to electric actuator

When tightening the closing cap (103, 167) and the hexagonal nut (123), secure the diaphragm plate against distortion with a spanner size SW 24.

For correct fitting of the diaphragm system into the valve body bring the cross hole of the union piece (122) and the valve body (121) in alignment: Turn the diaphragm system clockwise and anticlockwise to the stop, and mark these positions with a pencil. Them turn the diaphragm system into the middle position.

RMG part no. for

breathing line

bleed line connection for the inlet pressure line with RMG 502 / RMG 503

item

pencilmarks: for the stops for the central position adjusting movement valve body diaphragm hexagon nut

190

spring plate

LM

10 011 795

191

ring

LM

10 021 766

192*

sealing

193

plate, complete

194 195 196*

o-ring

197

clutch device, pre-assembled

EV

K

10 021 765

St/AlBz

10 000 079

washer

St

00 014 156

cylinder screw

St

00 010 150

KG

00 020 326

St/NSt

10 010 538

EV

*) parts marked with an asterisk (*) and with EV are to be kept in stock for maintenance material key St

... steel

LM

... light metal

K

... plastic material

FSt

... spring steel

Ms

... brass

KG

... rubber-like plastic material

NSt

... stainless steel

PGl

... plexiglass

AlBz ... aluminium bronze

640.20 p.13


1. General In addition to this leaflet 640.20 concerning "Special Operating Instruction, Maintenance and Spare Parts" of the pilot RMG 640, the brochure 640.00 gives full information about all relevant technical data, description of function, the available versions, and dimensions. Relevant technical data can also be obtained from the latest RMG booklet. Please also refer to the leaflets of the main valve the pilot is connected to. The RMG brochure "General Operating Instructions for Gas Pressure Regulators and Safety Devices" will be useful to fit the safety device into the line, put it into service and find faults that might disturb its operation. Please also check if the construction, set-up, supervision and maintenance of gas pressure regulating stations may be subject to special national regulations. These technical rules should be observed strictly (Within Germany observe the DVGW worksheets G 490, G 491, G 495). The frequency of periodical maintenance of gas pressure regulators and other components of the regulating line is strongly dependant on the prevailing service conditions, the type and composition of the gaseous medium, the ambient temperature and on dust and dirt withing the pipe system. We therefore abstain from imposing any fixed intervals and would rather advise testing out the necessary maintenance intervals, starting with short gaps for maintenance dismantling, and then increasing the intervals if there are no damages or signs of wear. For maintenance all parts are to be cleaned and subjected to a thorough visual inspection. Complete dismantling together with visual inspection should not be omitted when the course of operation or performance tests have shown lack of accuracy. Particular care should be given to the checking of sealings and diaphragms, as well as the closing spring and all movable parts. Damaged parts should be replaced by new ones. The item numbers referred to in the maintenance instructions are identical with those of of the spare parts drawings and of the spare parts lists. We recommend to keep all parts that are specially marked in the spare parts lists in stock for prompt maintenance availability.

2. Special operating instructions 2.1 Start-up valve The gas pressure regulators RMG 402, RMG 502 and RMG 503 are fitted with a start-up valve. This valve enables a quick pressure compensation at the regulating diaphragm, making the first pressurization.

• Open the start-up valve before pressurization. • After pressurization close the start-up valve again.

2.2 Adjusting the dosing screw The dosing screw has a basic setting by RMG and in most cases needs no further adjustment. For reduction of the amplification and to reduce instable regulating behaviour turn the dosing screw anti-clockwise (max. 3 turns).

640.20 p.14

640.20 p.03


640.20 p.02

640.20 p.15


We supply you with products for gas pressure regulation:

Pilot RMG 640

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, below ground gas control modules

Bryan Donkin RMG Co. of 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

Betriebsstelle 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

Operation and Maintenance, Spare Parts

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

Serving the Gas Industry - WORLDWIDE

We reserve the right for technical changes

Serving the Gas Industry - WORLDWIDE

640.20 edition 05/1994


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