PIETRO FIORENTINI MT044, Техническое руководство

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TECHNICKÁ P Ř ÍRU Č KA MT044
TECHNICAL MANUAL MT044
Význam symbol ů je uveden níže:
The list of symbols used and their meanings are listed
below:
Pemax = maximální vstupní tlak
Pemax
= maximum inlet operating pressure of the ap-
paratus
bpe
= range of variability of the inlet pressure of the
pressure regulator in normal operating conditions
Pzul
= maximum pressure which can be supported by
the structure of the body of the apparatus in safety con-
ditions
Wa
= range of setting of the pressure regulator/
pilot/pre-regulator which can be obtained using the
parts and the setting spring fitted at the moment of
testing (without changing any components of the ap-
paratus, that is). In piloted regulators, the pilot is con-
sidered as a separate apparatus with its own setting
range Wa
Wh
= range of setting of the pressure regulator/pilot/
pre-regulator which can be obtained using the setting
springs indicated in the associated tables and also by
changing some other part of the apparatus (reinforced
gasket, diaphragm etc.). In the piloted regulators, the
pilot is considered as a separate apparatus with its own
setting range Wh
QmxPemin
= maximum flow rate with minimum pres-
sure at the pressure regulator inlet
QmxPemax
= maximum flow rate with maximum pres-
sure at the pressure regulator inlet
Cg
= experimental coefficient of critical flow
RG
= regulation class
SG
= closing pressure class
AG
= intervention accuracy
Wao
= range of intervention for the over pressure of
slam-shut, relief and safety valves and accelerators
which can be obtained using the setting spring fitted at
the moment of testing. In piloted safety valves, the pilot
is considered as a separate apparatus with its own set-
ting range Wao
Who
= range of intervention for the over pressure of slam-
shut, relief and safety valves and accelerators which can
be obtained using the setting springs indicated in the
tables. In piloted safety valves, the pilot is considered as
a separate apparatus with its own setting range Who
Wau
= range of intervention for the reduction of slam-
shut pressure which can be obtained using the setting
spring fitted at the moment of testing
Whu
= range of intervention for the reduction of slam-
shut pressure which can be obtained using the setting
springs indicated in the tables.
bpe = rozsah vstupního tlaku p ř i normálních
provozních podmínkách
Pzul = maximální konstruk č ní tlak t ě lesa regulátoru
Wa = tlakový rozsah , kterého je možno dosáhnout
osazenými pružinami
WWh = tlakový rozsah kterého je možno dosáhnout
pružinami uvedenými v tabulce a p ř ípadnou vým ě nou díl ů
nap ř .membrány, atd..
QmxPemin = maximální pr ů tok p ř i minimálním vstupním
tlaku
QmxPemax = maximální pr ů tok p ř i maximálním vstupním
tlaku
Cg = koeficient p ř i kritickém pr ů toku
RG = regula č ní t ř ída p ř esnosti
SG = t ř ída p ř esnosti uzavíracího tlaku
AG = t ř ída p ř esnosti pro rychlouzáv ě r
Wao = tlakový rozsah rychlouzáv ě r pro vzestup, kterého je
možno dosáhnout s osazenými pružinami
Who = tlakový rozsah rychlouzáv ě ru pro vzestup, kterého
je možno dosáhnout s pružinami uvedenými v tabulce
Wau
= tlakový rozsah rychlouzáv ě ru pro pokles, kterého je
možno dosáhnout s osazenými pružinami
Whu = tlakový rozsah rychlouzáv ě ru pro pokles, kterého je
možno dosáhnout s pružinami uvedenými v tabulce
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