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A containment seal chamber drain for non-condensing leakage on arrangement 2 unpressurized seals with containment seals. Used if the pumped fluid does not condense at ambient temperatures.
A From mechanical seal
B To vapor collection system
C Drain
4 Flush (F)
5 Containment seal vent (CSV)
6 Containment seal drain (CSD), closed
7 Gas buffer inlet (GBI), plugged unless used with Plan 72
8 Seal chamber
Example seal: EagleBurgmann LL9DTUE dual pusher mechanical seal.
Key
1 To vapor collection system
2 Tube
3 Pipe
5 Containment seal vent (CSV)
6 Containment seal drain (CSD), closed
7 Gas buffer inlet (GBI), plugged unless used with Plan 72
PIT Pressure transmitter with local indicator
2CW-CS, 2NC-CS
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