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MC • Edition 05.20 • Nº 279 663
11.3 Example of calculations of adjustment values
Determination of the setting values by means of a pressure graduation table
Regulator chosen
FRM-NOC 100025 MD / SAV MD
Outlet pressure of the regulator p
d
200 mbar
System-specific operating pressure after the regulator p
adm
500 mbar
Pressure limit in the case of failure
550 mbar
Accuracy class
AC 5
Upper cut-off pressure accuracy class SAV
AG
o
10
Lower cut-off pressure accuracy class SAV
AG
u
10
Response group of the SBV
AG 5
Result
Group of devices
Device data
Pressure graduation
Safety devices against over-
pressure
Gas pressure regulator
Safety device against under-
pressure
AG
o
10
SAV
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
SAV
AG
u
20
60 mbar
50 mbar
40 mbar
p
du
=
Pressure limit in the case of failure: 1,1 * p
adm.
550 mbar