TP50-160/2 Shaft Seals Manual

28
Types of shaft seals
Shaft seals
Grundfos type D
Grundfos type D seal is defined as a balanced O-ring
seal.
Description/features
• The design of the shaft seal makes it an ideal solu-
tion when pumping solid-containing and high-vis-
cosity liquids.
• The shaft seal is independent of the direction of ro-
tation.
Fig. 38
Type D seal
Application profile
The type D seal has the following application profiles:
• carbon/SiC
• SiC/SiC.
Type D with carbon/SiC seal faces
Suitability
The type D seal with carbon/silicon carbide seal faces
are suited for operation at temperatures from 0°C to
+140°C and for an operating pressure of up to 25 bar.
Type D with SiC/SiC seal faces
There is no relation between the indication of suitability
and the pressure-temperature diagram, but together
they form the application profile.
Suitability
The type D seal with SiC/SiC seal faces are suited for
operation at temperatures from
–20°C to +90°C and at a
operating pressure of up to 16 bar.
TM02 7094 2603
Suitable
Suitable under
certain
conditions
Not
suitable
Alkaline liquids
Acid liquids
Dry running
Solid particles in liquid
Precipitating/lime-
containing liquids
Anti-freeze liquids
Suitable
Suitable under
certain
conditions
Not
suitable
Alkaline liquids
Acid liquids
Dry running
Solid particles in liquid
Precipitating/lime-
containing liquids
Anti-freeze liquids