RMG 210 Guide

edition 10/2004
210.20
Operation and Maintenance,
Spare Parts
Serving the Gas Industry - WORLDWIDE
We supply you with products
for gas pressure regulation:
The other RMG Companies:
Pressure Reducing Valve
Pressure Reducing Valve
RMG 210
RMG 210
GB

Contents page
1. General 3
1.1 Safety notes 3
2. Special operating instructions 4
2.1 Adjustment of the intermediate pressure 4
3. Special maintenance instructions 5
3.1 intermediate pressure stage 5
3.2 outlet pressure regulating stage 5, 6
3.3 Screw tightening torques 6
3.4 Lubricants 6
4. Spare parts
4.1 Spare part drawings
4.1.1 Centre piece with outlet pressure regulating stage type N 7, 8
4.1.2 outlet pressure regulating stage type N, intermediate pressure stage type M 9
4.1.3 outlet pressure regulating stage type M 9
4.1.4 cut-away views 10
4.2 Spare parts lists 11, 12, 13
4.3 Spare parts drawings for gauge connections
4.3.1 gauge for outlet pressure 14
4.3.2 gauge for intermediate pressure 15
4.4 Spare parts lists 16
4.5 Parts to be held in stock for maintenance work 17
210.20 p.02 en

210.20 p.03 en
1. General
Every person engaged with installation, supervision, or maintenance of the gas pressure regulator type
RMG 210 is requested to read the following leaflets and brochures beforehand:
- Technical Description 210.00 - contains technical data, measurements, and describes function and
design.
- General Operating Instructions for Gas Pressure Regulators and Safety Devices - this RMG bro-
chure describes installation and operation, nad includes general hints on fault finding and repair.
- Operation and Maintenance, Spare Parts 210.20 - contains further details on installation and operation
of the gas pressure regulator RMG 210. Maintenance instructions and the spare part drawings and -lists
of the main valve are also included.
- The related functional elements are described in separate “Operation and Maintenance, Spare Parts”-
leaflets:
filter RMG 905 905.20
Additionally, the relevant national rules and laws have to be observed (In Germany please refer to the
DVGW worksheets G 600, G 459/II, G 491 und G 495).
The frequency of periodical maintenance of the gas pressure regulator RMG 512 should be determined
according to the prevailing conditions and the type and composition of the gaseous medium. Therefore,
no fixed maintenance intervals can be prescribed. For Germany: At the beginning we recommend to use
the maintenance intervals stated in the DVGW worksheet G 495. Then individual maintenance intervals
should be determined for every station.
For maintenance all parts are to be cleaned and subjected to a thorough visual inspection. A visual in-
spection should also occur when the course of operation or functional tests have shown lack of regulating
accuracy.
Particular care should be given to the checking of sealings and diaphragms, as well as carrying and mo-
ving parts. Damaged parts should be replaced by new ones. The item numbers referred to in the mainte-
nance instructions are identical with those of spare parts drawings and spare parts lists.
We recommend to keep all parts that are specially marked "W" in the spare parts lists in stock for prompt
maintenance availibility.
1.1 Safety symbols
Safety symbols include the following key words in these operating instructions
explanation
risk of human injury
risk of damaging equipment or environment
additional information or requirements
symbols
!Caution!
Note
!Warning!

210.20 p.4 en
General design of the gas pressure regulator RMG 210 (R 10d)
*) Should the nominal flow be below qn< 9 x pa abs , then an external measuring line is not necessary. The
connection for the external measuring line can then be blocked using the supplied plug. The outlet pressure
measurement is then automatically effected via an internal bore hole.
outlet pressure control stage
intermediate pressure stage
external measuring line *)
setpoint adjuster
for intermediate pressure stage
breathing line
breathing line
setpoint adjuster
for outlet pressure
inlet pressure pe
outlet pressure pa
2. Special operating instructions
2.1 Adjustment of the intermediate pressure
The height of the internediate pressure influences the regulating characteristics of the device significantly. To
achieve a great regulating accuracy the intermediate pressure should be set as high as possible, but without
making the regulating line unstable. Lowering the intermediate pressure can dampen regulating over-reactions,
but also reduces the max. possible flow.
The height of the intermediate pressure should be approx. 1 - 2 bar above outlet pressure.
safety cap

210.20 p.05 en
3. Special maintenance instructions
3.1 Intermediate pressure stage (see page 9)
Diaphragm (68)
Sealing insert (81)
3.2 Outlet pressure stages M and N (see pages 7 and 9)
For dismantling remove lid (69), then push diaphragm (68) towards the inlet pressure connection
(to the left), and bend up this edge of the diaphragm, so that the ring underneath slides off the
lever (80).
For exchange the screws (98) should be loosened and the complete lever system (80) taken out
of the body. An indentation on the sealing insert (81) caused by the nozzle (83) is normal. The
sealing insert can be removed by levering it out with the help of a needle.
After renewing the sealing insert the position of the assembled lever system has to be checked:
Pull the lever outward to push the piston onto the nozzle. The lever should then be parallel to the
diaphragm base. If not, then vary the washers (51, 85) under the inlet pressure connection (90),
until the correct position is achieved.
Control pin (16, 76)
The control pin should glide easily in the bearing.
When adding new parts to the outlet pressure control stage check the adjusting measurement
and adjust if necessary (A new control pin might be needed!)
For the correct adjusting measurement please refer to the drawing below:
•
•
•
Note
Note
adjusting measurement 14,5 mm +0,5
lid version starting from 8/97
adjusting measurement 9,5 mm
lid version up to 7/97
Remove the piston guide (82) and check the nozzle tip visually. When using filtered, non-aggressive
gases the nozzle tip should be free of pollution or wear. In this case do not dismantle any further.
Nozzle (83) (see page 10)
•
The screw plug (50) remains screwed tight during maintenance work..
Screw plug (50) (see page 10)
•
When using filtered, non-aggressive gases the nozzle tip should be free of pollution or wear. No
further dismantling is necessary in this case.
control nozzle (28) (see page 7)
•

210.20 p.06 en
3.3 Screw tightening torques
30
2,5
3.4 Lubricants
9, 61
4
Adjusting measurement for outlet pressure control stage M
item no. tightening torque
Min Nm
A
adjusting measurement 5mm
Note
Piston (23)
The piston should move freely in the guiding bush.
•
part (to be greased slightly) lubricant RMG stock no.
all o-rings, all gliding surfaces,
all moving parts silicone grease 00 027 081 (tube 0,1 kg)
regulating screw (33, 73), threads and
indentation for spring plate mounting paste 00 027 091
all fastening screws and
all screwed pipe connections mounting grease 00 028 267
To check the correct height, press the control pin (16, 76) lightly downward to the first stop.
In this position, the control rod (20) rests on the piston (23), and the nozzle is still closed.
Upon delivery, the control pin has extra length and should be shortened to the correct
length before mounting (and sandpaper down any sharp edges!).

210.20 p.07 en
4.1 Spare part drawings
4.1.1 Centre piece with oulet pressure stage type N
MPlease note the screw tightening torques on page 6!
WParts are to be held in stock for maintenance.
A
A
M
A
M
lid version starting from 8/97
1
W 2
3
4
5
6
7
W 8
9
33
34
35
36
37
38
39
40
42
43
44 W
45 W
54
37/38
32
31
29
28
27
54
48
22 W
49 W
52/53
50
51 W
10
W 13
14
15
W 16
20
21
22
W 23
24
25
W 22
26

210.20 p.08 en
WParts to be held in stock for maintenance work.
42
7
W 8
W 44
43
outlet pressure stage type N - lid construction up to 7/97
item
no. description amt. W material RMG stock no.
7 hexagonal screw St 00 010 054
8 o-ring 1 W KG 00 020 353
42 lid size N 1 LM 10 012 137
43 intermediate ring 1 LM 10 017 916
44 diaphragm 1 W KG 10 017 918
Spare parts list

210.20 p.09 en
M please refer to torque table on page 4!
Wparts to be kept in stock for maintenance.
A
4.1.3 outlet pressure control stage M
76 W
68 W
69
40
2 W
37/38/39
75
3
64
4
9
67
74
73
172
61
1
4
65
64
37/38/39
40
737271702
W
96968
W
6766
W 60
70
4.1.2 outlet pressure control stage N, intermediate pressure stage M
C
A
D
A
M
A
M
A
M
A
M
A
M

210.20 p.10 en
4.1.4 Cut-away views
Wparts to be held in stock for maintenance.
80
51
50
W 81
82
83
84
W 51/85
37/38
88
89 W
EE
view E - E
view A - C
view D
90
87/91
98
99
100
94

item
no. description amount W material RMG stock no.
210.20 p.11 en
4.2 Spare part lists
1 cap 1 LM 10 012 139
2 o-ring 1 W KG 20 307
3 screw 1 St 10 017 650
4 hexagonal nut 1 St 13 138
5 spring plate, at option:
5 Wa 10 mbar to 40 mbar 1 LM 10 016 679
5 Wa20 mbar to 60 mbar 1 LM 10 017 661
5 Wa40 mbar to 120 mbar 1 LM 10 017 661
5 Wa 80 mbar to 200 mbar 1 LM 10 017 661
5 Wa 100 mbar to 500 mbar 1 LM 10 016 681
6 diaphragm plate 1 St 10 016 672
7 hexagonal screw 10 St 10 455
8 o-ring 1 W KG 20 324
9 hexagonal nut for outlet pressure stage size N 10 St 5 692
9 hexagonal nut for pressure stage size M 6 St 5 692
10 diaphragm plate 1 LM 10 017 654
13 washer 1 W KG 8 032
14 cylindrical screw 3 St 6 543
15 intermediate plate LM 10 017 588
16 control pin (40,5 mm long) 1 W NSt 10 017 926
20 control rod 1 Ms 10 017 603
21 guiding washer 1 Ms 10 017 610
22 washer 3 W LM 18 688
23 piston, complete 1 W LM/KG 10 017 616
24 spring compensating piece 1 LM 10 017 614
25 spring 1 FSt 10 017 639
26 screw plug 1 Ms 10 017 606
27 body 1 LM 10 024 341
28 control nozzle 1 W LM 10 017 596
29 spring 1 NFSt 10 014 020
31 intermediate piece 1 LM 10 017 600
32 sealing screw 1 Ms 10 017 923
33 adjusting screw 1 Ms 10 012 140
Wparts to be held in stock for maintenance
material key
St ... steel LM ... light metal SSt ... plastic foam
NSt ... stainless steel Ms ... brass K ... plastic material
FSt ... spring steel Cu ... copper KG ... rubber-like plastic material
NFSt ... stainless spring steel Bz ... bronze KGFP... rubber-like plastic material with coating
GS ... cast steel GLM ... cast light metal FPM ... special rubber-like plastic material
GGG ... cast iron with globular graphite GMs ... cast brass FP ... special plastic material
GZn ... cast zinc AlBz ... aluminium bronze PGL ... plexiglass
GBz ... cast bronze

item
no. description Anz. W Werkst. Teile - Nummer
210.20 p.12 en
34 spring compensating piece, at option:
34 Wa10 mbar to 40 mbar 1 St 10 014 931
34 Wa20 mbar to 60 mbar 1 St 10 014 931
34 Wa40 mbar to 120 mbar 1 St 10 014 931
34 Wa80 mbar to 200 mbar 1 St 10 014 933
34 Wa100 mbar to 500 mbar 1 St 10 014 933
35 spring, at option:
35 Wa10 mbar to 40 mbar 1 FSt 10 014 926
35 Wa 20 mbar to 60 mbar 1 FSt 10 015 469
35 Wa40 mbar to 120 mbar 1 FSt 10 016 660
35 Wa80 mbar to 200 mbar 1 FSt 10 014 516
35 Wa100 mbar to 500 mbar 1 FSt 10 015 161
36 threaded ring 1 LM 10 014 900
37 cap nut 4 St 30 804
38 compression joint 5 St 30 904
39 dosing screw 1 Ms 10 005 096
40 threaded adapter 1 St/KG 10 024 347
42 lid N (starting from 8/97) 1 LM 10 012 141
43 intermediate ring (starting from 8/97) 1 LM 10 012 142
44 diaphragm 1 W KG 10 017 918
45 washer 1 W KG 8 068
48 connecting piece 1 St 32 633
49 washer 1 W KG 10 017 612
50 screw plug 1 St 30 106
51 washer (1,5 mm thick) 1 W LM 18 815
52 cap nut 1 St 30 807
53 compression joint 1 St 30 906
54 cap (only for internal measuring) 2 32 005
60 USIT ing 6 W St/KG 27 858
61 cylindrical screw 6 St 10 207
64 diaphragm plate 1 St 10 014 983
65 spring guiding plate 1 LM 10 017 697
66 ring screw 1 NSt 10 014 993
67 threaded dowel 6 St 12 203
68 diaphragm 1 W KG 10 014 989
69 lid M 1 LM 10 012 138
70 nut 1 St 10 014 996

item
no. description amount W material RMG stock no.
210.20 p.13 en
71 spring 1 FSt 10 015 005
72 spring compensating piece 1 St 10 016 656
73 regulating screw 1 Ms 10 014 999
74 spring, at option:
74 Wa 0,3 bar to 1,5 bar 1 FSt 10 016 654
74 Wa1,0 bar to 2,5 bar 1 FSt 10016 655
74 Wa2,0 bar to 3,5 bar 1 FSt 10 015 005
75 sealing screw 1 Ms 10 017 688
76 control pin (17 mm long) 1 W NSt 10 017 691
80 lever system, pre-assembled 1 Ms/NSt 10 014 452
81 sealing insert 1 W KG 10 014 474
82 piston guide 1 Ms 10 014 471
83 nozzle 1 W Ms 10 014 466
84 washer 1 W LM 18 811
85 washer (1,0 mm dick) 1 W LM 18 814
85 washer (2,0 mm dick) 1 W LM 18 849
86 cap nut 1 St 30 803
87 compression joint 1 St 30 903
88 connecting piece 1 St 30 110
89 washer 1 W LM 18 689
90 adapter 1 LM 10 018 459
91 cap nut 1 St 30 804
94 sealing screw 1 St 32 017
98 cylindrical screw 2 St 10 596
99 washer 2 St 8 279
100 bolt 1 St 10 020 042

210.20 p.14 en
4.3.1 Gauge for outlet pressure
Version without pressure gauge
100
101
12/14
102
103
gauge for intermediate pressure
see page 15

210.20 p.15 en
4.3.2 Gauge for intermediate pressure
112
110
87/88
111
110

item
no. desxcription amount W material RMG stock no.
210.20 p.16 en
4.4 Spare parts list
gauge for outlet pressure
100 pressure gauge, at option:
100 Wa 0,3 bar to 1,5 bar 1 St/Ms 27 191
100 Wa 1,0 bar to 3,5 bar 1 St/Ms 26 891
101 overpressure safety valve, at option:
101 RMG 925 for 2,5 bar 1 89 252 404
101 RMG 925 for 6,0 bar 1 89 252 406
102 adapter 1 St 31 213
102 plug (for version without outlet pressure gauge) 1 St 32 005
gauge for intermediate pressure
110 pressure gauge 1 St/Ms 26 281
111 adapter 1 St 31 865
112 overpressure safety valve 1 89 251 407

item
no. description amt. material RMG stock no.
210.20 p.17 en
4.5 Parts to be held in stock for maintenance
2 o-ring 1 KG 20 307
8 o-ring 1 KG 20 324
13 washer 1 KG 8 032
16 pin (40,5 mm long) 1 NSt 10 017 926
23 piston, complete 1 LM/KG 10 017 616
44 diaphragm 1 KG 10 017 918
45 washer 1 KG 8 068
49 washer 1 KG 10 017 612
60 USIT ring 6 St/KG 27 858
68 diaphragm 1 KG 10 014 989
76 control pin (17 mm long) 1 NSt 10 017 691
81 sealing insert 1 KG 10 014 474
85 washer (1,0 mm thick) 1 LM 18 814
85 washer (2,0 mm thick) 1 LM 18 849
89 washer 1 LM 18 689

210.20 p.18 en

210.20 p.19 en

The RMG Group of Companies on the internet: http://www.rmg.de
We supply you with products
We supply you with products
for gas pressure regulation:
for gas pressure regulation:
We reserve the right for technical changes
Serving the Gas Industry - WORLDWIDE
The other RMG Companies:
The other RMG Companies:
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
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 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
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
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
Karl Wieser GmbH
Anzinger Strasse 14, D-85560 Ebersberg, Germany
Telephone (++49) 8092 2097-0 • Fax (++49) 8092 2097-10
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
works Beindersheim
ZUG GAZOMET Sp. z o.o.
ul. Sarnowska 2, 63-900 Rawicz, Poland
Telephone (++48) 65 546 24 01 • Fax (++48) 65 546 24 08
ball valves, accessories, gas pressure regulating and meterign stations
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
Pressure Reducing Valve
RMG 210