Welcome back to the Poseidon Forum!

[mr_v]

This is fantastic news, Robert. I am interested in the course, as I'll be adding Poseidon Xstream regulators to my stable that now has MK10/G250 and Deep6.

 

[mr_v]

Fantastic news. Always been curious about getting regs from the brand, and this makes me even more so. I currently have Apeks regs, but between their somewhat uncertain future, and the ability to learn to service my own regs available from places like Deep6 and now Poseidon?

Might be selling some regs in the near future.....

I am in the same boat and will be gradually moving off Apeks for Dee6/Poseidon. If I can't service a reg with official parts, I probably will pass on it.

 

[Mobulai]

Documentation of prior training for initial certification may be required.

Does your regtech seminar count towards that? (Answered already)
Would such a Poseidon class/cert be available to me in the EU, or is it a US only thing?
And the favorable parts price as well?
Can I use such a cert to carry out service for others as “affiliated Poseidon service”?
(Obviously I’m interested in the course — almost entirely regardless of the answers; would love to be shortlisted)

Edit:

as extensive as my 3‐day Reg Tech Seminar to get your foot in the door.

Nvm just saw this part

 

[rsingler]

Would such a Poseidon class/cert be available to me in the EU, or is it a US only thing?

With documentation of previous training, the initial cert course will eventually be offered online, so yes to EU. But there is a European trainer that conducts courses. DM me.

And the favorable parts price as well?

If you buy from Poseidon Diving Logistics, LLC in Florida, you get our prices. But you may have import duty.

Can I use such a cert to carry out service for others as “affiliated Poseidon service”?

Don't know about your legal climate. Your certificate won't be any different than a shop technician's certificate. So on that front, yes. You're technically allowed to service more than just your own gear. But here in the U.S., doing that might be an invitation to a lawsuit when the family is looking for someone to blame for their relative's dive tragedy, which may not have been related to your service.

 

[Mozzz]

I have a question, as far as I remember mounting a first xstream with a second cyklon 5000 was not recommended in the cyklon's manual. So what's new or different with the set Xstream/Cyklon now available ?

 

[Mobulai]

I have a question, as far as I remember mounting a first xstream with a second cyklon 5000 was not recommended in the cyklon's manual. So what's new or different with the set Xstream/Cyklon now available ?

Operational IP
I believe old cyklons were recomended by the manual to be tuned at 160-180psi
I believe that it’s possible to run them at lower IP, but that drastically increased cracking effort

Jet/Xstream are the opposite, if you have IP about 140-150 or more they’ll lock up and stop responding, also why they need an OVP (recommendation is 110-130psi)

The main restriction is running both together; you either tune the 1st stage to run at the one range or the other

 

[rsingler]

I have a question, as far as I remember mounting a first xstream with a second cyklon 5000 was not recommended in the cyklon's manual. So what's new or different with the set Xstream/Cyklon now available ?

I'm sorry, but your question is a touch unclear.
If you're asking...

... mounting a first stage xstream with a second stage cyklon 5000

then that is just fine. The Xstream first stage can handle any required IP delivery from 0-200 psi. It just took awhile to get though all the required certification paperwork for the combination, after the first stage was introduced.

If your question was..

mounting two different second stages: a first xstream with a second cyklon 5000...

then @Mobulai is mostly correct. Each design has a markedly different required IP, and one or the other second stage will be drastically out of tune, with poor breathing characteristics.
At high IPs, the Cyklon does best (until it freeflows, like any downstream second stage). In contrast, the Xstream's breathing characteristics will be very abrupt, because of the larger force behind the valve insert when it collapses as the servo compartment is vented. It will not "lock up" however, but just be uncomfortable to breathe because it can deliver such high gas flow.
Conversely at low IP, it can difficult to seal a downstream reg that is designed for higher pressures (Cyklon), and if you do, it may be quite stiff if you have left the settings for the higher pressure. An Xstream, on the other hand, breathes much more smoothly. At least until you reach tank pressure below 200 psi, when it will begin to freeflow.
You can still breathe off either reg if they freeflow.

 

[Mobulai]

An Xstream, on the other hand, breathes much more smoothly. At least until you reach tank pressure below 200 psi, when it will begin to freeflow.

Obviously I was very wrong about that part — I might need that training sooner rather than later

 

[Bigbella]

To add even further confusion, there was a period of time when both the Jetstream second stage and that of the Cyklon overlapped, in terms of maximum IP.

I recalled seeing both models on the same rig.

When the Jetstream was first introduced as the "Cyklon Maximum," decades ago, the IP was set at a mere 128 psi (9 bar); but when it was marketed as the Thor / Oceanair, the IP was set to a maximum of 181 psi (12.5 bar), though later lowered a bit as the Jetstream, down to 145 psi (10 bar) -- and lowered even further to 123 psi (8.5 bar) with the Xstream . . .

 

[Mozzz]

Well, thanks. What's interesting is that in the Xstream owner manual (P. 22) the cyklon second stage is not mentioned as a possible second stage on it. Just the Jetstream, wich is obvious, as it's basically the same servo-assisted valve than the Xstream. I remember in a previous owner manual that matching a first stage Xstream with a second stage cyklon was not allowed (Yes, mainly an IP question). So, are the Poseidon's first stages sold new with cyklon's second stage just tuned to a higher IP ?