Pumps With Impeller E; Mechanical Seal - KSB MEGAFLOW 50-160 Operating Instructions Manual

KSB Megaflow
8.2.2. Pump with Impeller type E
Fig.6
Notes: To calculate pressure PW, please consult the Type series booklet.

9. Mechanical Seal

If the pumped liquid is inflammable, explosive, toxic, of high cost, or when after an accurate cost analyze the result is
benefic, we recommend the use of Mechanical Seal. The Mechanical Seal when correctly selected and installed presents
advantage in the maintenance frequency comparing it with gasket. After a short period of adaptation during the operation
there is no more liquid dropping.
The Mechanical Seal consists basically of a fixed ring and one rotating sliding over the fixed one, of which polished surface
remains jointed by means of pressure by spring. The sealing of the rotative ring over the shaft and the sealing of the fixed
ring in the gland, are of appropriate material to the pumped liquid. For a safe and of long duration operation it is important
that the liquid film between the slide surfaces is formed and the consequent heat is properly absorbed by liquid circulation.
Depending on the pumping conditions, this circulation can be expected from the pumped liquid or from external separate
source.
Mechanical Seals are built in many different materials and assemblies, attending all the different chemical and physical
characteristics of the liquids to be pumped.
In the case of supply of Shaft Seal by Mechanical Seal, we will send complementary information.
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