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5. List of abbreviations
Abbreviation
Description
AC
Accuracy class
SG
Closing pressure group
K
Flow coefficient
G
Rp
Threaded connection
p
Upper response pressure
do
p
Lower response pressure
du
p
Maximum operating pressure
max
PN
Nominal flange pressure
PS
Maximum permissible pressure
SBV
Safety pressure relief valve
SN
Serial number
SW
Width across flats
W
Adjustment range for the upper response pressure by use of the adjusting springs available
do
W
Adjustment range for the lower response pressure by use of the adjusting springs available
du
W
Specific adjustment range of the adjusting spring installed for the upper response pressure
dso
W
Specific adjustment range of the adjusting spring installed for the lower response pressure
dsu
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