SSV-Actuator RMG 673
(K 1a, K 2a)
Operation and Maintenance,
Spare Parts
Serving the Gas Industry - WORLDWIDE
673.20
edition 11/1993
1. General
Our leaflet 720.00 gives full information with technical data, different versions, and dimensions of the complete safety
shut-off valve type RMG 720.
Our brochure "General Operating Instructions for Gas Pressure Regulators and Safety Devices" will be useful to fit
the valve into the line, put it into service and find faults that might disturb its operation.
The construction, set-up, supervision and maintenance of gas pressure regulating stations are subject to special
national technical rules which should be strictly observed, for example those given by the German DVGW Work-
sheets G 490, G 491, and G 495.
The frequency of periodical maintenance to be foreseen for the safety shut-off unit RMG 673 should be determined
according to the prevailing service conditions and the type and composition of the gaseous medium. We, therefore,
obstain from imposing any fixed intervals. In Germany please refer to the recommendations given by the DVGW
Worksheet G 495 on "Gas Pressure Regulating Stations and Metering Stations for High Gas Volumes - Supervision
and Maintenance".
For maintenance all parts are to be cleaned and subjected to a thorough visual inspection. A visual inspection should
not be omitted when the course of operation or performance tests have shown lack of response accuracy.
Particular care should be given to the checking of sealings and diaphragms, as well as all carrying and movable parts.
Damaged parts should be replaced by new ones.
The item numbers referred to in the maintenance instructions are identical with those of the 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
availability.
This safety shut-off unit is used in the following main bodies. Therefore please refer also to the relevant
manuals for "Operation and Maintenance, Spare Parts" stated below:
valve type
RMG 300
RMG 330
RMG 332
RMG 402
RMG 703
RMG 704
RMG 720
manual:
"Operation and Maintenance, Spare Parts"
300.20
330.20
332.20
402.20
703.20
703.20
720.20
2. Special operating hints
2.1. Opening the safety shut-off unit (SSV)
The SAV is provided with underpressure shut-off release. Re-engagement is possible only after the pressure pre-
vailing at the measuring point comes up to the service pressure p
opening is automatically effected by the pressure compensating valve integrated in the valve plate.
673.20 p.2
. The pressure compensation necessary for re-
a
actuator K 1a, K 2a for RMG 720 DN 25 and for RMG 300, RMG 330, RMG 332 RMG 402
The pressure compensation is effected automatically
when the valve plate is opened:
Screw out closing cap (1) , turn upside-down, screw
it on to the valve stem (5, 52, 60) and turn the lid
slowly towards the body. The pressure compensation
will respond. Pull the locking cap back to the stop and
let it glide back slowly: The SSV re-engages and stays
in the "OPEN" position.
ATTENTION:
In order to ensure perfectly reliable SAV-release
performance after re-engagement, it is indispensable
to screw the locking cap (1) back into its normal
position.
closing cap (1)
valve stem
(5, 52, 60)
actuator K 1a, K 2a for RMG 703 and RMG 704
The necessary pressure compensation is effected by opening the by-pass valve (ball valve or needle valve type
RMG 913) situated at the side of the main valve body.
ATTENTION: The by-pass ball valve must be closed again after re-engagement.
Screw off the closing cap (107), turn it around and place it on th evalve stem (112). Push down the valve stem
to the stop and let it gide slowly upwards again. The SSV re-engages and stays in the "OPEN" position.
3. Special maintenance instructions
Trip the SAV before you remove it from the body. SAV valves provided with underpressure release (standard
version) will close automatically.
• Prior to dismantling the tripping mechanism, the valve plate and the valve stem (5, 52, 60, 112) of a measuring
unit released by underpressure should be moved back to reach at least its re-engagement position (this
refers to RMG 703 and RMG 704).
• It is important that the valve stem ( 5, 52, 60, 112) can be moved easily and smoothly. Should any faults or
damages of material (e.g. ridges or flaws) be detected at the valve stem shoulder, the valve stem has to be
replaced by a new one.
• The contact surfaces between spring retainer (8) and diaphragm plate (26), or switch bush (12, 136), should
be kept free from grease.
• When mounting the ball release mechanism, pull back valve stem (5, 52, 60, 112) or - for RMG 703, RMG 704 -
press it down, and then push the diaphragm plate (26) or the retaining bush (12, 136) over the balls (into the
same position as underpressure release).
673.20 p.3
3.1 test switching
Test switching may only be carried out if the control elements are mounted in the main valve body,
otherwise mechanical damages could result.
ATTENTION: closing cap (1) must be removed from the valve stem (5, 52, 60) for test switching and during
normal operation (screw off cap immediately after re-engagement).
3.2 torque table
screw item no.
K 1a
10
33
109
131
12
-
25
65
3.3 lubricants
parts (apply thinly)
all o-rings,
diaphragm clamping rim
all moving areas
thread of the valve plate (3),
thread of the closing lid (1, 107)
all screws and screwed pipe connections
torque M
in Nm
A
K 2a
12
20
15
65
lubricant
silicone grease
assembly paste
high duty grease
remarks
version PN 63
version PN 100
RMG stock no.
00 027 081
00 027 091
00 027 058
3.4 assembly and adjusting tools
tool
RMG part no. for item no. remarks
tongs A 19
DIN 5254
00 026 531
tongs D 19
DIN 5256
00 026 532
SSV setpoint
adjuster
10 004 912
673.20 p.4
17
51
3 and 4
not necessary for RMG 300,
RMG 703, and RMG 704
4. spare parts
4.1 spare parts drawing RMG 673 K 1a and K 2a
actuator unit for RMG 300
version for overpressure nad underpressure release
K 1a K 2a
W
W
W
W
W
W
W
W
W
W
version for
underpressure release
W
W
W
W
special version for
overpressure release only
(without reaction at diaphragm rupture)
Parts marked "W" are to be held in stock for maintenance
W
673.20 p.5
spare parts drawing RMG 673 K 1a and K 2a
actuator unit for RMG 330 and RMG 332
K 1a K 2a
W
W
W
W
actuator unit for RMG 402 and RMG 720
K 1a K2a
W
W
W
W
Parts marked "W" are to be held in stock for maintenance
Parts without item no. see page 5
673.20 p.6
W
W
4.2 spare parts list RMG 673 K 1a and K 2a
actuator unit for RMG 300
item
no. description
1
2 W
3
4
5 W
6
-
-
7
-
-
-
8
9 W
10
11
12
13 W
14
15
16
17 W
18 W
19 W
20
21 W
22
23
24 W
25 W
26
27 W
28
29 W
30
31 W
32
33
34
35
closing cap
sealing washer
spring plate
spring plate
valve stem, complete
spring for underpressure release, at option
Ø 1,1 mm (light blue)
Ø 1,2 mm (white)
Ø 1,4 mm (black)
spring for overpressure release, at option
Ø 2,5 mm (yellow)
Ø 3,2 mm (bright red)
Ø 3,6 mm (dark red)
Ø 4,75 mm (white)
spring retainer
o-ring
cylindrical screw
spring housing
arresting sleeve, complete
diaphragm
hexagonal nut
diaphragm plate
pressure disc
safety washer
ball
o-ring
SSV bottom cover, complete
o-ring
spring
connecting pipe
valve plate with Überströmdüse
valve plate, vulkanized
diaphragm plate, complete
sealing washer
switching valve RMG 919-1
o-ring
supporting ring
ring
intermediate ring
hexagonal nut
arresting pipe
Seeger circlip
material
LM
K
Ms
K
NSt
FSt
FSt
FSt
FSt
FSt
FSt
FSt
K
KG
St
GLM
LM/NSt/KG
KG
St
St
LM
FSt
NSt
KG
GLM
KG
FSt
St
LM/KG
LM/KG
LM/St/KG
LM
KG
LM
KG
LM
St
LM
FSt
RMG part no.
K 1a K 2a
10 000 854
00 020 343
10 001 844
10 000 856
10 010 614
10 000 868
10 001 837
10 001 760
10 001 838
10 000 866
10 000 867
10 001 839
10 008 563
00 021 069
00 010 150
10 010 608
10 010 619
10 010 610
00 003 399
10 010 611
10 004 882
00 019 131
00 005 108
00 020 371
10 010 605
00 020 563
10 011077
10 011 080
10 011 081
10 011 076
00 018 694
89 190 000
-
-
-
-
10 001 784
00 019 183
10 000 854
00 020 343
10 001 844
10 000 856
10 010 614
10 000 868
10 001 760
10 000 866
10 000 867
10 001 839
10 008 563
00 010 150
10 010 608
18 354 902
00 003 399
-
-
00 005 108
00 020 371
10 010 605
00 020 563
10 011077
10 011 080
10 011 081
10 011 076
10 004 929
00 018 694
89 190 000
00 020 361
10 004 938
00 021 005
10 010 598
10 004 924
10 001 784
00 019 183
Parts marked "W" are to be held in stock for maintenance
material key:
St
NSt
FSt
... steel
... stainless steel
... spring steel
LM
Ms
GLM
...aluminium alloy
... brass
... cast aluminium
K
KG
... plastic material
... rubber-like plastic material
673.20 p.7
4.2 spare parts list RMG 673 K 1a and K 2a
item
no. description
36
37
38
39
50
51 W
52 W
53
54 W
55
56 W
57 W
60 W
61
retaining pipe
adapter
cap nut
compression joint
actuator unit for RMG 330, RMG 332,
and RMG 720/402
spring
safety washer
valve stem, complete
SAV-Boden, vollständig
o-ring
intermediate piece
valve plate, vulkanized
valve plate, vulkanized
valve stem, complete
SSV bottom cover, complete
material
LM
St
St
St
FSt
FSt
NSt
LM
KG
LM
LM/KG
LM/KG
NSt
LM/St/NSt/KG
RMG part no.
K 1a K 2a
10 010 584
00 030 113
00 030 804
00 030 904
10 009 227
00 019 093
10 004 923
10 010 595
00 020 345
10 004 933
10 003 580
10 004 942
10 008 635
10 010 585
10 010 584
00 030 113
00 030 804
00 030 904
10 009 227
00 019 093
10 004 923
10 010 595
00 020 345
10 004 933
10 003 580
10 004 942
10 008 635
10 010 585
Parts marked "W" are to be held in stock for maintenance
material key:
St
NSt
673.20 p.8
... steel
... stainless steel
LM ...aluminium alloy KG ... rubber-like plastic material
FSt
... spring steel
4.3 spare parts drawing RMG 673 K 1a and K 2a
actuator unit for RMG 703 and RMG 704
version PN 63
K 1a K 2a
W
W
W
W
W
W
version PN 100
K 1a K 2a
W
W
version PN100
special version for overpressure release only
(without reaction upon diaphragm rupture)
W
W
W
W
W
Parts marked "W" are to be held in stock for maintenence
Parts without item no. see page 5
W
W
673.20 p.9
4.4 spare parts list for RMG 673 K 1a and K 2a
actuator unit for RMG 703 and RMG 704
item
no. description
100
101 W
102
103
104
105 W
106
107
108 W
109
110 W
111
112 W
113 W
114
115
116 W
117
130
131
132 W
133
134 W
135
136
137
138 W
139 W
140
141 W
142 W
switching valve RMG 919-2
sealing ring
connecting piece
cap nut
compression joint
o-ring
hexagonal nut
locking screw
o-ring
cylindrical screw
safety ring
diaphragm lid
valve stem, complete
safety washer
cylindrical screw
guide bush
o-ring
actuator housing
diaphragm lid
cylindrical screw
safety washer
switching valve RMG 919-1
o-ring
actuator housing
retaining bush, complete
intermediate ring
o-ring
diaphragm
pressure disc
safety washer
Seeger ring
material
LM
St
St
St
KG
St
St
KG
St
St
LM
NSt
St
St
NSt
KG
LM
LM
St
St
KG
LM
LM
KG
KG
LM
FSt
FSt
RMG part no.
K 1a K 2a
89 191 000
00 018 694
00 030 113
00 030 804
00 030 904
00 020 309
00 003 020
10 001 789
00 020 244
00 010 369
00 014 112
10 001 743
10 005 553
00 014 125
00 010 370
10 005 549
00 020 226
10 005 546
10 022 523
00 010 594
00 014 114
89 190 000
00 020 518
10 005 552
-
-
-
-
-
-
00 019 182
89 191 000
00 018 694
00 030 113
00 030 804
00 030 904
00 020 309
00 003 020
10 001 789
00 020 244
00 010 369
00 014 112
10 001 743
10 005 553
00 014 125
00 010 370
10 005 549
00 020 226
10 005 546
10 022 523
00 010 594
00 014 114
89 190 000
00 020 518
10 005 552
10 022 512
10 022 514
00 021 005
10 022 515
10 022 516
00 019 187
00 019 182
Parts marked "W" are to be held in stock for maintenance work
material key:
St
NSt
673.20 p.10
... steel
... stainless steel
LM ...aluminium alloy KG ... rubber-like plastic material
FSt
... spring steel
4.5 Spare parts drawing for electric remote indication
(not valid for SSV RMG 703/704)
W
Parts marked "W" are to be held in stock for maintenace purposes
4.6 Spare parts list for electric remote indication
item
no. description material RMG part no.
320
321
322
323
324
325 W
326
327
328
329
330
331
Parts marked "W" are to be held in stock for maintenace purposes
material key:
closing lid
spring guide
proximity switch
relais
spring
o-ring
metal ring
disc
Seeger ring
intermediate piece
cylindrical screw
spring housing
LM
LM
FSt
KG
St
St
FSt
LM
St
GLM
10 004 793
10 004 794
00 024 046
00 024 047
10 014 020
00 020 425
00 008 271
10 004 795
00 019 188
10 004 792
00 011 020
10 010 616
St
FSt
... steel
... spring steel
LM
GLM
... aluminium alloy
... cast aluminium
KG ... rubber-like plastic material
673.20 p.11
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, 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
The RMG Group of Companies on the internet: http://www.rmg.de
Serving the Gas Industry - WORLDWIDE
We reserve the right for technical changes
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