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Unpressurized external buffer fluid system supplying clean buffer liquid for the outer seal of an arrangement 2 unpressurized dual seal. Buffer liquid is circulated by an external pump or pressure system.
A From external source
B To external source
1 From external source
2 To external source
3 Flush (F)
4 Liquid buffer OUT (LBO)
5 Liquid buffer IN (LBI)
6 Seal chamber
Example seal: EagleBurgmann LY9DZTT dual pusher mechanical seal.
Key
1 From external source
2 To external source
2CW-CW
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