GESTRA ZK 29, Руководство по установке

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21
In equipment with other actuators the stuffing box
can be adjusted via the hinged bolts.
The following section describes how to adjust the
stuffing box in equipment with electric rotary
actuator.
The adjustment procedure is the same for other
types of equipment.
The torque required for tightening the stuffing box
screws depends on the type.
The torque required for tightening the screwed
union depends on the condition of the stuffing-box
packing. Tighten the screwed union until the
following requirements are met:

The stuffing box must not leak.

The movement of the stem must not be
impaired by the stuffing box.
 If it is not possible to meet both requirements
you have to replace the stuffing-box packing.
 Tighten the nuts on the two hinged bolts evenly.

Allow medium to flow through the equipment.
 Move the spindle fully several times.

Tighten the hinged bolts evenly again so that no
medium escapes.

Check that the spindle can move easily.

If necessary, slacken the hinged bolts evenly.
The stuffing box is correctly adjusted if no medium
escapes and the spindle can move easily.