PIETRO FIORENTINI HBC 975, Manual

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HBC 975
Use, maintenance and warning manual
SLAM-SHUT VALVE | GENERAL INFORMATION | REV. 00
EN
2.8.1 - GLOSSARY FOR NAMEPLATES
The terms and abbreviations used on the nameplates are described below:
Term Description
CA Accuracy class.
AG max
Slam-shut valve accuracy class due to pressure increase.
“OPSO” (Over pressure shut off).
AG min
Slam-shut valve accuracy class due to pressure decrease.
”UPSO”(Under pressure shut off).
bpu Range of inlet pressure for which the regulator ensures a given accuracy class.
CE Mark certifying compliance with applicable European directives.
Cg Flow rate coefficient.
Class
Alphanumeric designation used for references purposes related to a combination of mechanical
and dimensional characteristics for flanges, in accordance with the relevant parts of EN 1759
series, which includes the word Class followed by a dimensionless whole number.
DN Nominal size of connections.
Fail safe mode Regulator reaction mode (Fail open or Fail close).
Flange Type of flanged connections or type of connection thread.
Fluid Type of fluid compatible with the equipment.
ID no. Number of the Notified Body participating in the conformity assessment of the equipment.
Pilot Pilot family.
PS Maximum permissible pressure for which the equipment was designed.
PSD Specific maximum permissible pressure for which the equipment was designed.
Pu (Up) Upstream pressure.
Pumax
Maximum inlet pressure at which the regulator can operate continuously under specific condi -
tions.
REGULATOR Equipment family.
SG Lock-up pressure class.
Slam-shut device Slam-shut valve family.
S.n. Equipment serial number.
Strength type Strength class: integral strength (IS) or differential strength (DS).
TS Permissible temperature range (min. and max.) for which the equipment is designed.
Triggering unit
Pressure switch family.
Type
Accessory type and family.
Wd
Full range of set points that can be obtained from the regulator by adjusting and/or replacing
certain components (e.g. replacement of valve seat or control element, e.g. spring).
Wdo
Full setpoint range as a result of tripping caused by pressure increase in the pressure switch
incorporated in the slam-shut valve.
This range can be obtained by adjusting and/or replacing the components (for example, spring
or sensitive element).
Wds
Full range of set points that can be obtained from the regulator by adjustment and without re-
placement of its components.
Wdso
Full setpoint range as a result of tripping caused by pressure increase in the pressure switch
incorporated in the slam-shut valve.
This range can be obtained by adjusting but not replacing the components.