Kraken HP seat and other issues Aug 6, 2023 17:01:16 GMT -8
Post by Fibonacci on Aug 6, 2023 17:01:16 GMT -8
All were survivable but a little unnerving and embarrassing since all were either on a dive charter boat or in the case of the pool failure, in front of a dive class.
I guess I sympathize because I’ve had failures that I’ve been fortunate enough to survive. They didn’t have the same fortune and that is sad beyond measure. ~snip~
With all the best original intentions, unfortunately the Kraken has some design flaws...
The exhaust valve 'spider' tends to get distorted in production (thick wall injection moulding transitioning to a thin wall) and leaks back into the hose causing a complete flood if you sit head slightly down (as in photographing macro subjects).
I had to get a replacement can from Bryan, but the existing seal face may possibly be sanded or milled flat if not too bad.
The second major issue is the exhaust valve suction cupping onto the LP diaphragm, leading to randomly variable WOB and hose floods. Mine was particularly bad in this respect, the suction cupping led to noticeable witness marks when the can was split. The solution is to fit an Apeks exhaust valve AP1429 with integral standoff rib, this is a robust fix but should have led to a global alert to all existing customers, and introduced as a running change on all future production.
The third issue I have faced is VERY short service life on the HP seats, it appears the OEM fitment was Trident seats but even replacing them with AquaLung blue HP seats they only lasted around 20 dives before the IP spiked. Mine is a 2017 model and it seems that this batch only suffers from the failure mode, others have contacted me with similar stories of very short HP seat life from brand new.