Incident Report

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Incident Report 2020-05-01T16:26:00+00:00

Draeger-Normalair Pillar Valve Leak

Incident Date

1905-02-06

Incident Description

1980 - During some of the exploratory dives in a multi-sump river cave using Draeger- Normalair international thread fitting (DIN) cylinders there were at least three instances of a backward leak due to failure to expand of the washer between the gland nut and the spindle.

Lessons Learned

This could be cured by turning the tap full on which compresses this washer. However it is then difficult and time consuming to turn the bottle off should a leak develop in other parts of the appartus.
Factors
Line Management Negligible
Gas Management Negligible
Equipment Management Minor
Equipment Failure Major
Training Minor
Medical Negligible
Planning Negligible
Procedural Error Negligible
Cave Environment Negligible
Weather Negligible
Other Factor Unknown