Why do Poseidon's breathe better?

[brian cooper]

I repeat most diaphragm 1st stages ARE Upstream. the supply pressure is trying to hold the reg shut, the diaphragm,water pressure, the spring and the plunger push the poppet back against the supply pressure and the small spring to open the reg to top up the IP.

I also repeat that the Cyclon 2nd stage reg is a Downstream reg and as such DOES NOT require a pressure relief valve. I do concede that the Jetstream servo mechanism IS an Upstream / tilt mechanism but whether it needs a PRV is a matter for conjecture, has anyone ever got an answer out of Poseidon?

I have wondered for years why the relief valve was there...

The only way to truth is to question everything.

Brian C

 

[The Chairman]

I have wondered for years why the relief valve was there...

(That would be a "yes" as to the company's belief that they need one)

 

[Bob3]

This accounts for the pressure reliefs...

There is no pressure relief on the Cyklon hoses. Different nut, yes.
It's only the Odin/Jetstream & now the new Xstream that use the OPVs in the hose ends. (hoses are interchangeable)

The current round of ill feeling (in the USA) towards the Poseidons was caused by the former US distributor, who had high prices, few parts, & in the opinion of a lot of customers, lousy service.
That's about the same time frame that the urban legend of "shutting off the air" in the event of a first stage puke started.

 

[buff]

I also don't understand where the belief that the Jetstream is "finicky" and hard to service/adjust.

I am not a certified tech. but have adjusted the second stage on my Jetsteam to my liking. It seemed rather straight forward to me-actually simpler than many regs.

Nothing breathes better than my Jetsteam not my Apeks or my Cyklon 5000.

 

[thethumper]

While I'm not a reg tech, (I once stayed @ a Holiday Inn)

I have 3 Jet sets & I have them tweaked just right. The 1st time the tech showed me how simple it was to adjust the 2nd I couldn't belive it. Now I will say I have had some problems after 2 rebuilds where the IP on 1 crept to about 150-160 psi & the other to over 200 psi. I was told it was the HP seat. I have talked to a local tech & he's been having similar ceeping problems over the last few months. My question is wheather the seat in the kit is not the same or is it the techs. I know you have to bring up the IP slowly to get a good seating, but seems to be several instances.

 

[Metalman]

Hi folks!
I am brand new to this board and pretty new to diving. Still I am considering buying a regulator so that I don't have to rent them anymore. As I said, my experience is pretty limited and I have used only two regs:

Scubapro R190 w/ octo R190 (ugh... I almost quit diving during training because of my experience with this reg)

Poseidon Cyklon 5000 (excellent, solid, but not exaclty "mainstream")

Between these two, I would take the Cyklon without thinking twice about it, but I have seen various negative reports saying that they are hard to breath and failure prone. Strangely enough, otherreports pit it against regulators which are much more costly and come to the result that they are comfortable, robust, and very sturdily built. How can this be?


Could any of you give me some insight as to why these regs are so loved by some (like many of the people in my dive club) and hated by others (like some other people in the same club)?

Should I be considering any other regs? I will be diving a lot in Germany so warm-water regs won't cut it.

Thanks!
Metalman

 

[The Chairman]

Small differences can sometimes be portrayed as life threatening flaws. Some people LOVE some regulators but HATE others. Th Cyklons are great and I know a number of instructors who love them. I prefer my Micras over all else! They are the weetest breathing reg I have ever tried... including the Apexs and the ScubaPros etc, etc. You are the best judge as to what "fits" you.

 

[Bob3]

... hard to breath and failure prone ...

That's a new one on me. I have 3 Cyklons & by far they have been the sturdiest & most reliable reg I have, continuing to deliver air even when iced or full of sand/muck.
The review in the mag you listed could've been done on an out of tune reg, or possibly by someone with a skewed opinion. Try a search on the board here, the Poseidon regs have been discussed quite a few times.

... been having similar creeping problems ...

IP creep seems to be limited to the Jetstream/Odin & not the Cyklon 1st. The problem is normally handled by making sure the innards are very clean & a polishing of the piston/needle helps as well. Slowly bringing the 1st up to operating pressure is importantl, and a "re-adjust" of the IP after the parts have set is a good idea to do on any 1st stage.