Dungs FRM-NOC 100025 HD, Instruction Manual, Page: 6 / 76

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MC • Edition 2022.08 • No
. 279 663 R
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5. Abbreviations
14.5 SAV leakage test 68
14.6 Recommended maintenance intervals 68
15. Spare parts 69
15.1 Regulatory list of spare parts 69
15.2 List of spare parts SAV 70
15.3 Storage conditions 71
16. Tables of flow diagram 71
16.1 Tables of flow diagram AC 10 explanation 71
16.2 Valve flow coefficient K
G
72
Abbreviation Description
AG
o
Response pressure group of the overpressure shut-off (OPSO)
AG
u
Response pressure group of the underpressure shut-off (UPSO)
AC Accuracy class
ASE Safety shutoff valve (SAV) without housing (as spare part)
K
G
Flow volume coefficient for natural gas
DN Nominal diameter
Fail-open If the main diaphram or the auxiliary pressure required for the actuation of the main valve fails, the main
valve moves automatically to the open position.
DS Type: differential strength range
Class A Functional class: in case the membrane is damaged or in the event of a breakdown of the impulse line pres -
sure the SAV closes
MOP Maximum admissible operating pressure
p
d
Outlet pressure
p
d, abs.
Output pressure as absolute pressure
p
u
Inlet pressure
p
u, abs.
Inlet pressure as absolute pressure
p
do
Overpressure shut-off (OPSO)
p
du
Underpressure shut-off (UPSO)
p
max
Maximum operating pressure
PN Nominal pressure rating of the flange
PS Maximum admissible pressure
SAV Safety shutoff valve / Slam-shut valve (same as ASE but with housing)
SBV Safety relief valve
SG Lock-up pressure class
SN Serial number
SZ Lock up pressure zone group
Tp. Operating temperature -20 °C ... +60 °C
W
ds
Specific guide range
W
do
Adjustment range for the overpressure shut-off (OPSO) through regulation of the
available adjusting springs
W
du
Adjustment range for the underpressure shut-off (UPSO) through regulation of the
available adjusting springs
W
dso
Specific adjustment range of the adjusting spring installed for the over pressure shut-off (OPSO)
W
dsu
Specific adjustment range of the adjusting spring installed for the under pressure shut-off (UPSO)