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Technical manual
MT 208-E
11
4.0
IN LINE MONITOR
The monitor is an emergency regulator whose function is to come into
service instead of the main regulator when failure of the latter causes
the downstream pressure to reach the point set for monitor
intervention.
5.0 START
UP
5.1 GENERAL
After installation, check that the inlet/outlet on/off valves, any by-pass
and the bleed cock are closed.
Before commissioning, you must ensure that the conditions of use
comply with the characteristics of the apparatuses.
These characteristics are recalled by the symbols on the specification
plates applied to each apparatus (
fig. 18
).
We recommend actuating the opening and closing valves very slowly.
The regulator could be damaged by operations which are too fast.
APPARATUS SPECIFICATION PLATES
The list of symbols used and their meanings are listed below:
= According to 97/23/CE PED Directive
Pumax
= maximum operating pressure at the inlet of the apparatus.
bpu
= range of variability of the inlet pressure of the pressure regulator
in normal operating conditions.
PS
= maximum pressure for which the body and its inner metallic
partition walls are designed in accordance with the strength
requirements in this document.
Wds
= setting range of the pressure regulator which can be obtained
using the parts and the setting spring fitted at the moment of
testing (that is without changing any components of the
apparatus).
Wd
= setting range of the pressure regulator which can be obtain using
the setting springs indicated in the associated tables and also by
changing some other part of the apparatus (reinforced gasket,
diaphragm, etc.).
Cg and KG
= experimental coefficient of critical flow.
AC
= regulation class.
SG
= closing pressure class.
AG
= intervention accuracy.
Wdso
= range of intervention for the over pressure of slam-shut which
can be obtain using the setting spring fitted at the moment of testing.
Wdo
= range of intervention for the over pressure of slam-shut which
can be obtain using the setting springs indicated in the tables.
Wdsu
= range of intervention for pressure decrease of slam-shut which
can be obtain using the setting spring fitted at the moment of testing.
Wdu
= range of intervention for pressure decrease of slam-shut which
can be obtain using the setting springs indicated in the tables.
fig. 18
fig. 16
fig. 17
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Содержание APERFLUX 101
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Страница 35: ...Technical manual MT 208 E 34 AR 100 fig 29 sales mvandc com Phone 877 566 3837 Fax 925 407 2903...