30
Adjusting the gland seal
If the stuffing box is leaking, you must adjust it. To
do so, proceed as follows.
DANGER
Personnel working on pipes are exposed to
safety risks and may suffer severe injuries,
poisoning or even loss of life.
Make sure that no hot or hazardous
fluid is in the equipment or the pipes.
Make sure that the pipes upstream
and downstream of the equipment are
depressurised.
Make sure that the installation is
switched off and protected against
unauthorised or unintended activation.
Make sure that the equipment and the
pipes have cooled down to room
temperatures.
Wear protective clothing that is
suitable for the fluid and, if necessary,
wear protective gear.
For more information on suitable protective clothing
and safety gear refer to the safety data sheet of the
fluid in question.
The torque for tightening the hex nuts on the
stuffing box varies depending on type.
The necessary torque for tightening the hex nuts
depends on the condition of the stuffing box.
Tighten the hex nuts sufficiently firmly to ensure the
following conditions are satisfied:
No medium may escape from the gland seal.
The gland seal must not hinder the movement
of the stage plunger.
If these conditions cannot be satisfied at the
same time, you must replace the stuffing box.
Evenly tighten the two hex nuts (31) on the
stuffing box gland (32).
Allow medium to flow through the equipment.
Move the stage plunger fully several times.
Tighten the hex nuts again so that no medium
escapes.
Check that the stage plunger can move easily.
If necessary, slacken the hex nuts evenly.
The stuffing box is correctly adjusted if no medium
escapes and the stage plunger can move easily.
If you are unable to adjust the gland seal as
described, you must replace the stuffing box.
To do so, proceed as described on page24.
