Grundfos NK Instrucciones De Instalación Y Funcionamiento página 19

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 secon-
dary seals are placed in the seal chamber
Fig. 3 Connections for barrier liquid of
back-to-back arrangement with stan-
dard 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?
arrangement)
Comments on circulation for the primary shaft seal:
_______________________________________________
_______________________________________________
Pipe connections
to secondary
shaft seal.
Pipe connections to the cartridge seal. The
direction of the barrier liquid depends on the
direction of rotation of the shaft.
Fig. 4 Connections for barrier liquid of
back-to-back arrangement with a car-
tridge seal
Yes ____ No ____
____________ ___ [bar]
Yes ____ No ____ (dead-end
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