Dungs FRM 100025 HD, Instruction Manual, Page: 128 / 174

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Edition 10.15 • No
. 270 442
11.3 Calculation example of set values
Determination of the set values by means of a pressure graduation chart
Selected regulator FRM 100025 MD / SSD MD
Outlet pressure of the regulator p
d
200 mbar
System-specific operating pressure downstream of the regulator p
zul.
500 mbar
Limiting pressure in case of fault 550 mbar
Accuracy class AC 5
Response pressure group of the upper shut down pressure SSD AG
o
10
Response pressure group of the lower shut down pressure SSD AG
u
10
Response group of the SBV AG 5
Result
Device group Device data Pressure graduation
Safety devices
against excessive pressure
Gas pressure regulator
Safety device
against insufficient pressure
AG
o
10
SSD
AG
o
10
AG 5
SBV
AG 5
440 mbar
400 mbar
360 mbar
315 mbar
300 mbar
285 mbar
p
d
=
p
do
=
SG 20
AC 5
FRM
AC 5
210 mbar
200 mbar
190 mbar
p
d
=
240 mbar
AG
u
20
SSD
AG
u
20
60 mbar
50 mbar
40 mbar
p
du
=
Limiting pressure in case of fault: 1.1 * p
perm.
550 mbar