Poseidon regs

[Belmont]

I was reading some comments on a Dutch website and I came upon this comment on Poseidon regs being not DIR.
I would appreciate if someone who knows Dutch could tell me the precise meaning of this text.

Bedanke

"De automaten van Poseidon zijn al jaren in gebruik in de technische duikwereld. Er is een aantal populaire modellen; de Cyklon, de Jetstream en het nieuwste model: de Xstream. Poseidon automaten hebben een aantal nadelen. Deze nadelen zitten niet zo zeer in de performance, ze geven namelijk veel gas, maar meer in andere zaken die ook van belang zijn voor de veiligheid. Dat is ook de reden dat ze niet passen binnen het DIR systeem."

 

[MonkSeal]

Google translator (with some correction) gives this: "The Poseidon regulators have been in use in the technical diving world. There are a number of popular models: Cyklon, Jetstream and the latest model Xstream. Poseidon regulators have a number of disadvantages. These drawbacks are not so much in the performance; they provide enough gas but in other cases that are important for safety. That is why they do not fit within the DIR system."

As you can see, no explanation. However, I believe this subject has been discussed several times on this board and I guess you can find these threads.

 

[RTodd]

First stages are fine but there are better alternatives now. Second stages suck and always have. Upstream design that can fail closed with the added bonus that they are super finicky and when they do freeflow they dump an enourmous amount of gas. You don't need that level of gas delivery, particularly with trimix. So it just increases the risks of gas loss. While not an issue for most divers, I believe they are harder to make in water expedient repairs as well but I have never dived them so could be wrong on that point.

 

[ivobj]

As RTodd mentioned, the first stage of Poseidon is ok, but second stage is terrible, so you probably will have to consider a mix of brands to use Poseidon. considering that poseidon works with a high intermediate pressure, not every second stage will work fine with it. I know that Scubapro S600 and S550 are fine because I already tested, but not sure of which others.

Although I liked the first stages with SP second stages I didn`t adopt poseidon because of other issue as well, maintenance, at least here in Brazil is dificult to have replacement parts to service (I do my own equipment maintenance, but if not this is another problem, not everyone service Poseidon regs here).

About being DIR, second stages, because of the upstream design (as explained in RTodd post it can fail closed), I would not consider DIR.

In my case, I prefer to stick with Scubapros and Apeks for now...

 

[nadwidny]

considering that poseidon works with a high intermediate pressure, not every second stage will work fine with it. ...

The IP on the 1st stage can be adjusted so that really isn't an issue.

 

[rjack321]

The custom hose ends for many 2nds are a big nit. I tried one once years ago and the 1st stage never seemed to be adjusted right IIRC. It was a friends and I was borrowing it.

Parts are a beetch to get in the States nowadays. Also hard to find a qualified tech for them. There are better, easier to service, more universal regs nowadays. The high IP, high flow rate design is a bit of a relic of thicker gases (than trimix) at depth. I am not much of an ice diver but they do have a good track record for wicked cold stuff, although apeks seem to work adequately too.

 

[Thalassamania]

I have to disagree, I have used Cyclon 300s for almost 40 years. It is one of the best regulators ever built, a very rugged, extremely high flow first stage and (what I have found to be) a very simple, rugged, easy to service and adjust second stage. If it freeflows it can dump a lot of gas, but that's the price you pay for a high flow regulator. I never cared for the newer Poseidons, but the 300 will always be one of my favorites.

I suspect the problems were more with hamfisted service techs that did not have a few rather simple special tools or who really never understood the regulator (e.g., you set the IP, set up the second stage and then tuned the reulator by adjusting the IP, very gently, to how you wanted it to breathe).

 

[b1gcountry]

The Poseidons also double as extra ballast. You could hammer nails with the older second stages!

Tom

 

[Thalassamania]

The Poseidons also double as extra ballast. You could hammer nails with the older second stages!

Tom

Really? With a Cyclon 300? Not my observation at all. As far as Poseidon regs not being DIR, my understanding is that they were not sponsors of the WKPP while ScubaPro was. 'Nuff said?

 

[Scuba Nurse]

I'm not sure what model it was, but it was built like a rock, and weighed about as much too.

Tom