16
bpe
inlet pressure field
Pemax
max inlet pressure
Wh
total intervention field
Wa
specific intervention pressure field with inserted spring
In particular we would like you to draw your attention to the following specifications:
- PS max. permissible pressure.
- TS design temperature (the minimum and maximum values are shown).
- the inlet and outlet connections class.
Moreover, the user shall check that the used materials and the applied surface treatments, if any,
are compatible with the expected use.
Considering the valve geometric specifications, during the design phase no stresses due to traffic,
wind, or seismic events were taken into consideration; therefore, the user shall take proper
precautions in order to limit the effects of such events on the assembly, when these are expected
3.0 COMMISSIONING
3.1 PRESSURIZATION
After the installation check that the connections to the line are correctly executed and that the
vents and drainages on the plant, if any, are closed.
Slowly pressurize the plant ( or the plant section) by means of the upstream process valve or of
other systems arranged for this and make sure that the pressure is at a value than the valve
setting value
3.2 CONTROL OF THE EXTERNAL TIGHTNESS
The tightness test of the valve connections to the plant shall be carried out according to the
provisions in force in the place of installation.
The external tightness is ensured when coating the element under pressure with a foaming agent,
no bubbles appear
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