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NOTE: This is an unformatted excerpt from our online fire protection training library.

Automatic Sprinkler Inspection, Testing & Maintenance

packing glands

The packing glands on a valve consists of a brass collar held in place by bolts. Tightening the bolts compresses packing material around the valve shaft to keep water from leaking out. The packing material is a square fiber rope impregnated with graphite that acts as a lubricant. As the packing wears it, the packing glands are tightened to further compress the packing around the shaft. When the packing becomes too worn to form a good seal, it must be replaced.


NOTE: This is an unformatted excerpt from our online fire protection training library.

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