Ohne Titel 1

Safety Shut-Off Valve
DN 25 - 150
General Description 711.00
edition 04/2000
Serving the Gas Industry - WORLDWIDE

Safety Shut-Off Valve
Application
l
l
safety device for gas pressure regulating stations
suitable for gases according to G 260 and all non-corrosive gaseous media
Characteristics
l easy maintenance, easy replacement of internal parts without dismantling the main valve from the line
l switch device self-adjusting to zero position
l integrated special safety by-pass valve for pressure compensation with automatic resetting into service position
l low pressure drop due to in-line flow
l four tripping facilities; manual release as a standard feature
l electro-magnetic release and electric remote indication of valve position as special features
l high response accuracy and short response time
l same face to face dimensions as safety shut-off valve RMG 710
1. Technical data
maximum service pressure p max
sizes
connections
valve seat diameter
100 bar (depending on flange rating)
DN 25, DN 50, DN 80, DN 100, DN 150
flanges according to DIN PN 25 and PN 40, and ANSI 300, ANSI 600
equal to pipe size diameter
materials
ambient temperature range
main valve body
switching device
measuring unit
internal parts
diaphragms, o-rings
closing spring
-15°C to +60°C
cast steel, steel
cast aluminium
aluminium forging alloy
aluminium, stainless steel, brass, steel
rubber-like plastic material
stainless steel
response time
function and strength
DIN-DVGW registration no.
0,1 ... 0,3 s (depending on service pressure, valve size and control unit)
according to DIN 3381
valid for all sizes: NG-4303AL0136
2

Safety Shut-Off Valve
Adjustable ranges
control
element
K 10a
1
2
3
4
5
setpoint spring
Nr . colour
bright red 3,2
dark red 3,6
white 4,75
white
black
wire
dia.Ø
mm
1,2
1,4
overpressure release
minimum differential
between response
range pressure and
service pressure
W ho (bar) ∆p (bar)
0,08 …0,25
0,2 …0,5
0,4 …1,5
0,05
0,10
0,25
underpressure release
minimum differential
between response
pressure and
service pressure
W hu (bar) ∆p (bar)
0,01 ...0,04
0,035...0,12
0,03
0,06
minimum differential
between over-/
underpressure
response points
with spring no.
4 5 6
0,09
0,15
0,30
0,13
0,18
0,34
response
precision
category
AG*
10 / 5
5 / 2,5
5 / 2,5
15 / 5
5
K 11a/1
1
2
3
4
5
6
bright red 3,2
dark red 3,6
white 4,75
light blue
black
red
1,1
1,4
2,25
0,4 ... 0,8
0,6 ... 1,6
1,5 ... 4,5
0,1
0,2
0,3
0,06...0,15
0,12...0,40
0,35...1,00
0,05
0,08
0,10
0,17
0,28
0,39
0,20
0,31
0,42
0,22
0,33
0,44
10 / 5
10 / 5
5 / 2,5
15 / 5
5
5
K 11a/2
3
6
white
red
4,75
2,25
2,5 ... 8,0
0,5
0,8 ... 2,2
0,4
1,0
10 / 5
15 / 5
K 16
1
2
3
4
black
grey
brown
red
4,5
5,0
6,3
7,0
1 … 5
2 … 10
5 … 20
10 … 40
0,2
0,4
0,8
1,2
2,5/ 1
1
1
1
K 17
2
3
4
grey
brown
red
5,0
6,3
7,0
2 ... 10
5 ... 20
10 ... 40
0,4
0,8
1.2
5
5
5
K 18
1
9,0
20 ... 90
1,5
1
* 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.
weights
connections
size DN
25
50
80
100
150
weight kg
20
26
56
85
200
measuring line
bleed line
vent line
E 12
E 12
E 12
3

Safety Shut-Off Valve
2. Design and operation
The safety shut-off valve RMG 711 consists of a one-piece main valve body, a switching device, a control element
and a pressure compensating valve.
The angle-joint valve flap with o-ring sealing gives tight shut-off in the position "closed" with corrosion-resistant spiral
springs exerting the closing force. After pressure balance has been established manually the pressure compensating
valve is automatically forced back into the position "closed".
A release mechanism is integrated in the switching device. When the pressure to be monitored reaches the pre-set
response point or when the manual release button is pressed, the switching ring is turned out of the position
"engaged", thus releasing the switching pins holding the valve flap shaft, and the valve closes. The valve can be reopened
by turning the valve flap shaft by a handlebar. The switching ring then automatically adjusts itself to the
pins enabling an accurate positioning of the release mechanism.
After re-engagement of the valve the handlebar is automatically pressed out of its retaining hole by the
force of an ejecting spring.
This safety shut-off valve is particularly easy to maintain:
- after unscrewing the spring casing the valve flap can be swivelled out of the main valve body.
- external functional parts are perfectly identical for the sizes DN 25, DN 50, DN 80, and DN 100.
4

Safety Shut-Off Valve
Main valve
cover
valve body
valve flap
lever
valve flap
pressure compensating
valve
operating
lever
by-pass pressure gauge
proximity sensor
manual release
button
switching device
switching ring
valve flap shaft
closing springs
(flat spiral spring)
indication
handlebar
5

Safety Shut-Off Valve
operation with control element K 16, K 17, K 18
The pressure to be monitored (service pressure) at the double diaphragm system has to be compared with a
setpoint value (response pressure setpoint) which is determined by the setpoint spring. When the upper response
pressure is reached, the overpressure at the control element K16 or K 18 causes the amplifying valve to open.
When the lower response pressure is reached, the underpressure at the control element K 17 equally causes the
amplifying valve to open. In both cases gas flows from the monitoring system to the pressure/thrust-converter. The
pressure increase does move the piston into the direction of the switch gear and causes that the valve flap shaft
releases. The actuator springs cause the SAV to close.
control element
(K 16 for upper setting range)
setpoint spring
setpoint adjuster
vent and bleed
line
switching device
valve flap shaft
throttles
double diaphragm
system
SAVmeasuring
line
amplifying
valve
switching ring
retaining pipe
pressure/thrustconverter
switch stem
switching pin
manual release
outlet pressure
atmosphere
6

Safety Shut-Off Valve
operation with control elements K 10a, K 11a
The control element is a release mechanism with a diaphr
which is kept in position by the setpoint springs. Both setpoi
sure and underpressure release can be adjusted without infl
se pressure is reached, the release movement in the control
ching ring of the switching device. This releases the valve fla
operation with magnetic switch (electric release)
closing on current failure
The magnetic rod is brought into opening position by means of a stroke movement of the magnet against the force
of the closing spring. In operating condition the magnet is under current, should the current supply fail the closing
spring operates the switch stem.
closing on current supply
The stroke movement of the magnet is transmitted to the release mechanism of the switching device via a switch
stem. This causes the SAV to close.
pneumatic release with control element
(K 10a for upper and lower setting range)
electric release with magnetic switch
(closing on current failure)
vent line with
tripping valve RMG 919
SAV
measuring
line
valve flap
shaft
switch stem
setpoint adjuster
switching ring
pressure spring
setpoint springs
switch stem
switching device
retaining pipe
switching pin
manual release
magnetic switch
7

Safety Shut-Off Valve
3. Dimensions
vent line E12
measuring line E 12 (M16 x 1,5)
C
B
A
E
D
safety shut-off valve RMG 711 with control element K 10a/K 11a
vent/bleed line E 12
measuring line
E 12 (M14 x 1,5)
C
B
A
F
D
safety shut-off valve RMG 711 with control element K 16 / K 17 / K18
Dimensions in mm
size
DN
25
50
80
100
150 6
PN
25, 40
170
230
280
320
430
ANSI 300
RF RJ
170
230
290
330
440
A B C D E F
180
240
300
340
450
ANSI 600
RF RJ
180
250
310
350
470
K 10a,
K 11a
260
260
295
305
355
K 16
K 17
295
295
330
345
390
K 18
415
415
450
465
510
160
160
190
205
275
110
125
150
170
235
K 10a,
K 11a
235
220
205
195
175
150
175
185
195
230
8

Safety Shut-Off Valve
UN-thread bolts dimensions of the screw joint SAV/SAV
B
A
L
G
DN flange A B UN-thread bolts number of thread bolts
type
dimensions G x L
PN 25 u. 40 18 2 1/2" x 70 4
ANSI 300 RF 18 5 5/8" x 80 4
25 ANSI 300 RJ 22,5 5 5/8" x 90 4
ANSI 600 RF 24 5 5/8" x 90 4
ANSI 600 RJ 24 5 5/8" x 90 4
PN 25 u. 40 23 2 5/8" x 85 4
ANSI 300 RF 23 5 5/8" x 90 8
50 ANSI 300 RJ 29 5 5/8" x 100 8
ANSI 600 RF 33 5 5/8" x 110 8
ANSI 600 RJ 34 5 5/8" x 110 8
PN 25 u. 40 27 2 5/8" x 95 8
ANSI 300 RF 29 5 3/4" x 110 8
80 ANSI 300 RJ 36 5 3/4" x 125 8
ANSI 600 RF 38,5 5 3/4" x 130 8
ANSI 600 RJ 40 5 3/4" x 130 8
PN 25 u. 40 27 3 3/4" x 105 8
ANSI 300 RF 32 5 3/4" x 115 8
100 ANSI 300 RJ 38 5 3/4" x 130 8
ANSI 600 RF 45 5 7/8" x 150 8
ANSI 600 RJ 46 5 7/8" x 150 8
PN 25 u. 40 31 3 7/8" x 120 8
ANSI 300RF 37 5 3/4" x 125 12
150 ANSI 300 RJ 44 5 3/4" x 140 12
ANSI 600 RF 55 5 1" x 175 12
ANSI 600 RJ 56 5 1" x 180 12
When using ductile screw bolts according to DIN 2510 an
intermediate piece between the two SAVs is necessary!
9

Safety Shut-Off Valve
4. Pressure loss depending on the gas flow rate (different inlet pressures and sizes)
pressure loss (bar)
2
1
0,7
0,5
0,4
0,3
0,2
0,1
0,07
0,05
0,04
0,03
0,02
inlet pressure (bar)
1 2 5 10 20 40 70 100
gas flow rate qn in m 3 /h (natural gas)
0,01
200000
100000
70000
50000
40000
30000
20000
10000
7000
5000
4000
3000
2000
DN 150
DN 100
DN 80
DN 50
DN 25
1000
example:
q n = 10000 m 3 (natural gas);
p e = 20 bar; DN 50
result: pressure loss 0,21 bar
10

Safety Shut-Off Valve
5. Type description (example)
RMG 711 - 50 - K10a - HA - F - FA - So
sizes DN
25 25
50 50
80 80
100 100
150 150
SAV-control element
W ho [bar]
W hu [bar]
0,08 ... 1,5 0,01 ... 0,12 K10a
0,4 ... 4,5 0,06 ... 1,0 K11a/1
2,5 ... 8,0 0,8 ... 2,2 K11a/2
1,0 ... 40,0 K16
2,0 ... 40 K17
20 ... 90 K18
in addition:
manual release
current supply
loss of current
temperature release
HA
E1
E2
TA
remote indication
F
outdoor type
FA
special version (to be specified in detail)
So
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, 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
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