The simple flushed mechanical seal is suitable for applications where media tend
to crystallise or harden on contact with the atmosphere.
Double mechanical seal
The double mechanical seal can be operated with flushed pressure below the
pump pressure. The seal is suitable for typical sterile applications where high
temperatures are required.
For hazardous pumping medium, the flush pressure may be above the pump
pressure. This creates the sealing liquid.
6.3.5.3 Connecting the flushing
Flushed mechanical seals are designed as lost flushing.
Fig.13: Flushing of the mechanical seals
A - Feed pipe, B - Return pipe
In this way, the flushing system is connected
1.
Connect the feed pipe (A).
•
Flushing system (flushed single mechanical seal): Flushing pressure
maximum 0.5 bar.
•
Flushing system (double mechanical seal): Pressure below the delivery
pressure as flushing liquid. flushing pressure maximum 0.5 bar.
•
Sealing system (double mechanical seal): Pressure 1.5 - 2 bar above the
delivery pressure as sealing liquid. Maximum permissible sealing pressure
5 bar above delivery pressure.
2.
Close the return pipe (B).
3.
Check the strength of the connections.
→ The flushing has been connected.
6.3.6 Electrical connection
Danger
Electric shock by touching live parts!
► Have the electrical connections be made by a licensed electrician.
► Observe local laws, standards and regulations - especially safety
precautions.
6.3.6.1 Star connection
Star connection for high voltage.
Assembly and installation
Setup, installation, and connection
BA.280.YYY.001.GB_4
21.02.2022 35
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