What Is The Difference Between X, Y & Z Purge Systems?

1.	What Is The Difference Between X, Y & Z Purge Systems?
Answer» X-rated purge SYSTEMS ALLOW uncertified equipment to be installed in Zone 1 (Division 1). Usually, power to the enclosure is switched off if pressurization is lost. Y-rated purge systems allow Zone 2 (Division 2) CERTIFIED equipment to be installed in Zone 1 (Division 1). Usually an ALARM sounds if pressurization is lost. Z-rated purge SYSTEM allows uncertified equipment to be installed in Zone 2 (Division 2). Usually, an alarm sounds if pressurization is lost.

Answer»

X-rated purge SYSTEMS ALLOW uncertified equipment to be installed in Zone 1 (Division 1). Usually, power to the enclosure is switched off if pressurization is lost.
Y-rated purge systems allow Zone 2 (Division 2) CERTIFIED equipment to be installed in Zone 1 (Division 1). Usually an ALARM sounds if pressurization is lost.
Z-rated purge SYSTEM allows uncertified equipment to be installed in Zone 2 (Division 2). Usually, an alarm sounds if pressurization is lost.

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