Dead Ending


Dead ending means to isolate the stuffing box. No lines in, no lines out.

We do this when we want to control the stuffing box temperature to prevent a seal failure due to the fluid becoming viscous, crystallizing, coking or changing state from a liquid to a gas or solid.

The normal dead ending procedure is to install a close fitting bushing into the end of the stuffing box and then control the stuffing box temperature with a heating/ cooling jacket (B) surrounding the stuffing box.

A thermal bushing in the bottom of the stuffing box is necessary if you want to do a good job.

Many of these jacketed stuffing boxes are covered with an insulation that could be hiding a discharge recirculation line, that will prevent the jacket from doing its job of controlling the temperature in the stuffing box.