Grundfos NK Serie Montage- Und Betriebsanleitung Seite 113

Back-to-back shaft seals
Pipe connection to primary
shaft seal.
The barrier liquid is directed to the seal faces of the shaft
seals. Both primary and secondary seals are placed in
the seal chamber
Fig. 3 Connections for barrier liquid of
back-to-back arrangement with standard
seals
Is a barrier liquid available in the application?
Description of the barrier liquid:
Chemical composition (if available):
Pressure of the barrier liquid:
System requirements for the barrier liquid:
Does the application require circulation of the barrier liquid?
Comments on circulation for the primary shaft seal:
Comments on dead-end arrangement
More comments/info about your system:
Date:
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Grundfos representative
114
Pipe connections to
secondary shaft seal.
Fig. 4
Yes ____ No ____
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____________ ___ [bar]
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Yes ____ No ____ (dead-end arrangement)
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Pipe connections to the cartridge seal. The
direction of the barrier liquid depends on the
direction of rotation of the shaft.
Connections for barrier liquid of
back-to-back arrangement with a cartridge
seal
Date:
___________________________________
Customer representative