PIETRO FIORENTINI Dival 600, User Manual

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15
DIV
AL 600
Use, maintenance and warning instructions
MEDIUM PRESSURE REGULATOR | GENERAL INFORMATION | REV. A
EN
2.8.1 - GLOSSARY FOR NAMEPLATES
The terms and abbreviations used on nameplates are described in “Tab. 2.6”:
Term Description
AC Accuracy class.
AG max
Slam-shut valve accuracy class due to pressure increase.
“OPSO” (Overpressure shut-off).
AG min
Slam-shut valve accuracy class due to pressure decrease.
”UPSO”(Underpressure shut off).
bpu Range of inlet pressure for which the regulator ensures a given accuracy class.
CE Marking certifying compliance with applicable European directives.
Cg Flow rate coefficient.
Class
Alphanumeric designation used for reference 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.
Pumax
Maximum inlet pressure at which the regulator can operate continuously under specific condi-
tions.
REGULATOR Equipment family.
SG Shut-off pressure class.
Slam-shut device Slam-shut valve family.
S.n. Equipment serial number.
Strength type Strength class: Integral strength or differential strength (DS).
T Permissible temperature range (min. and max.) for which the equipment was designed.
Tripping unit Pressure switch family.
Type Accessory type and family.
Wd
Full setpoint range 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 with regard to tripping caused by increased pressure 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 setpoint range that can be obtained from the regulator by adjusting but not replacing the
components.
Wdso
Full setpoint range with regard to tripping caused by increased pressure in the pressure switch
incorporated in the slam-shut valve.
This range can be obtained by adjusting but not replacing the components.
Wdu
Full setpoint range with regard to tripping caused by decreased pressure 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).