Expo-Telektron Safety Systems MiniPurge Z & Y Purge Manual ...
Expo-Telektron Safety Systems MiniPurge Z & Y Purge Manual ...
Expo-Telektron Safety Systems MiniPurge Z & Y Purge Manual ...
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<strong>Expo</strong>-<strong>Telektron</strong> <strong>Mini<strong>Purge</strong></strong> Z purge Handbook ML 307 Issue A Page 4-4<br />
4.3 The Methods of Pressurizing<br />
The Methods of pressurizing are as follows:-<br />
4.3.1 CF-Continuous Flow<br />
A continuous flow of protective gas is passed through the pressurized enclosure. Initially this<br />
flow is verified and performs the purging phase of the operation. When the purging phase is<br />
completed – i.e. the purge time has elapsed- the same flow of protective gas maintains the<br />
pressurization of the enclosure. This flow may be required to provide cooling of equipment in<br />
the pressurized enclosure, or to dilute an internal source of hazardous gas release.<br />
LCV<br />
Minimum Pressure /Flow<br />
Sensor<br />
Enclosure Pressure<br />
Test Point (Plugged)<br />
Enclosure Pressure<br />
<strong>Purge</strong> Outlet To Pressurized Enclosure<br />
Figure 1: Continuous Flow Circuit - (Drg ref:-XBR-7TD0-019)<br />
C:\Main System Files\Marketing\Memo\ML307 ISSUE A.doc<br />
Minimum Pressure<br />
& Purging Indicator<br />
Red = Alarm<br />
Green = Pressure/Flow<br />
OK<br />
I.S Switch<br />
(IS Option)<br />
Filter<br />
Alarm/Pressurized Output<br />
Signal @ Supply Pressure<br />
(PO Option)<br />
1 Common<br />
4 Pressurized<br />
2 Alarm<br />
<strong>Purge</strong> Supply<br />
Air or Inert Gas<br />
60-115 PSI<br />
4 – 8 Bar<br />
Page 4-4
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