Page 235 - Know and Understand Centrifugal Pumps

Know and Understand Centrifugal Pumps

This method requires a source or w ater or steam for the quench. The pumped liquid
may contaminate the drainage. If sc I, it should be discarded.

The heat exchanger
The heat exchanger is good for controlling temperature in the seal
chamber utilizing the same pumped product. This method doesn’t
dilute the product.

PUMP
SUCllON
Figure 14-19 The heat exchanger

The double or dual mechanical seal
The dual seal is good to control the environment inside the seal
without diluting the pumped product. It works with re-circulated
barrier fluid. It establishes a barrier between the pumped fluid and the
environment (Figure 14-20).

You’ve just seen six different concepts to control the environment
inside the seal chamber and mechanical seal. Some methods are
economical. Others are costly. Some have secondary side effects to
contend with. Now let’s consider the 14 difficult sealing situations and
apply the environmental controls to extend the running time of the seal
and pump.