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 4-5<br />
4.3.2 LC- Leakage compensation<br />
Initially a high flow of protective gas is passed through the enclosure. This flow is verified<br />
and performs the purging phase of the operation. When the purging phase is completed – i.e.<br />
the purge time has elapsed - the flow of protective gas is provided via a leakage<br />
compensation valve so that it just compensates for any leakage from the pressurized<br />
enclosure in addition to maintaining its pressurization.<br />
LCV<br />
Minimum Pressure<br />
Sensor<br />
Enclosure Pressure<br />
Test Point (Plugged)<br />
<strong>Purge</strong> Flow Sensor<br />
Flow Sensor Connection<br />
Enclosure Pressure<br />
Figure 3: Leakage Compensation circuit (Drg ref:-XBR-7TD0-016)<br />
C:\Main System Files\Marketing\Memo\ML307 ISSUE A.doc<br />
Purging<br />
Indicator<br />
Yellow = <strong>Purge</strong> Flow OK<br />
<strong>Purge</strong> time controlled manually<br />
By the operator<br />
<strong>Purge</strong> Outlet to Pressurized Enclosure<br />
Minimum<br />
Pressure<br />
Indicator<br />
I.S Switch<br />
(I.S Option only)<br />
<strong>Purge</strong> Supply<br />
Air or Inert Gas<br />
60-115 PSI<br />
4 – 8 Bar<br />
Red = Alarm<br />
Green = Pressure OK<br />
Alarm/Pressurized Output<br />
Signal @ Supply Pressure<br />
(PO Option only)<br />
<strong>Purge</strong> Control<br />
Valve<br />
1 Common<br />
4 Pressurized<br />
2 Alarm<br />
Page 4-5