ATEX UNLOADER AND RELIEF VALVES
SAFETY NOTE
SN03
Rev. 00
Date 27/10/2020
Pag. 10 of 10
If exposed to freezing temperatures, make sure that the valve is completely emptied after use in order to prevent the
freeze.
For all details regarding assembly and disassembly of the valve, please see the Maintenance Manual.
3.6.4 INHIBITION AND RE-INSTALLATION OF THE VALVE
For a working order inspection of the apparatus or for maintenance/replacement, the removal of the valve from the
application is permitted only when the apparatus is not under pressure and in the absence of a potential explosive
atmosphere.
Before reusing or reutilizing the valve after washes, general maintenance or any other necessary operation, follow the
warnings as seen on paragraph 3.2.1. of this safety note
After reinstalling the device, and before placing the equipment under pressure, verify the correct tightness between
the connections and apparatus and its efficiency.
3.6.5 REPLACEMENT OF PARTS & SPARES
It is necessary to replace the valve and/or its components when, upon the user’s discretion, the safety functions are
not guaranteed during working. The replacement of valve parts with others not identical to those original cannot
guarantee the design conditions established by P.A. S.p.A.
3.7 PREVENTION & REPRESSIVE ACTIONS (PRECAUTIONS)
The user must use suitable measures to eliminate a/o reduce potential explosive atmospheres externally to the valve
applying the Directive 99/92/EC.
The user must pertain to what established in order to:
Avoid, however possible, the formation of explosive atmospheres (concentration-classification limits of the
areas);
Choose qualified control systems;
Avoid the creation of lively trigger sources (prevention).
