Page 404 - Centrifugal Pumps 2E
P. 404
Mechanical Seals 369
Figure 17-9. Package mechanical seal installation with external piping.
Figure 17-10. Package mechanical seal with pumping ring and heat exchanger
closed looped for cooling (courtesy of John Crane),
On tandem seal installations, the inboard seal may be treated as a sin-
gle seal installation for cooling. However, the outboard seal is normally a
closed circuit with a pumping ring (Figure 17-16).
Positive methods for providing clean cool liquid to the seal must be
considered at all times. The use of a thermal syphon system for removing
heat on a pump application should be avoided.
