Ex pz safety equipment
C
C.1 Ex pz safety equipment
1 System status indicator 6 Purge outlet to enclosure 3/8” BSPP (f)
Fitted with 10 mm O.D tube adaptor
2 Air inlet 1/4“ BSPP (f) 7 Purge return from enclosure 3/8” BSPP (f)
Fitted with 10 mm O.D tube adaptor
3 Flow control 8 Air outlet – DO NOT OBSTRUCT
4 Cable gland for system cable connection 9 Relief valve type RLV25
5 System breather – DO NOT OBSTRUCT
FigureC-1 Expo Mini purge Type Z (7MB8000 – 1AA)
Connect the purge outlet (6) of the purging unit with the purging gas inlet of GA700 (see
Connecting the wall-mounted device (Page51)).
Connect the purging gas outlet of GA700 (see Connecting the wall-mounted device
(Page51)) with the purge return (7) of the purging unit.
60L volume of enclosure, multiplied by 10 acc. IEC 60079-2 resulting in 600 L pre-purge
volume. Divide this by the purge ow rate and round it up to the next even number of
SIPROCESS GA700 rack and wall mounted devices
Compact Operating Instructions, 06/2023, A5E35134047-AB 115
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