1st stage
Question
Hi, I would like to know about possible failures of first stage. What kind of possible failures may occur? Is free flow from first stage possible?
Thanks & regards
Answer
Hakan,
Yes, failure of the first stage resulting in free flow is possible. Some of the causes could include:
The intermediate pressure adjustment may creep higher than manufacturer抯 specifications
Foreign matter or sand interfering with the HP seat
Disintegration of HP seat materials
HP seat dirty, damaged, or worn
Crown orifice dirty, damaged, or worn
Failure of internal o-ring(s)
Freeze up due to extreme cold water
Most of these problems can be avoided by proper rinsing and maintenance between dives and regular servicing by an authorized service technician. In the case of extreme cold water problems, use a regulator specifically designed for cold water.
Hope this helps,
Henry Babcock
AllExperts SCUBA Expert
O2 diving
First stage