Poseidon Cyklon regulators

[Billdiver]

If you mean the Xstream 1st stage, the spring being exposed like that results in water flow for heat exchange, which is in fact why it does not freeze.

Good point, now I see it. That picture really shows it too, no ice in the spring chamber even though the rest is covered in a 1/4” of ice.

 

[Billdiver]

Can I buy an Xstream first stage and use it with either a Cyklon or Xstream second stage? Are the new Xstream 1st stages adjustable for the different IP?

 

[Mobulai]

Can I buy an Xstream first stage and use it with either a Cyklon or Xstream second stage? Are the new Xstream 1st stages adjustable for the different IP?

AFAIK (from reading previous posts by bigbella and tbone) that it’s an either or, you can adjust the IP bias spring on the 1st stage to match either the X/Jetstreams (low, around 120psi) or the Cyklons (high, around 170psi)
But you can’t have both 2nd stages on there without one of them giving subpar performance