Intermediate pressure up to 300 psi?

[redacted]

I estimate that using a spring from a Scubapro Mk200 in a Mk3 should get you an IP of about 240 psi, if the seat will withstand the extra force. A few shims should push it towards 300 psi.

Caution:. PWI

 

[herman]

I would think you would have to up the durometer of the piston head oring and maybe add a backup ring with that much pressure differential across it.

 

[ahereng]

Tecme sells a stronger spring for the Apeks DS4, allows for adjustment between 12-20 bars.
Tec Equipment für Nitrox, Rebreather Höhlen Tauchen

 

[jbbaille]

Awesome, 20 bars is pretty much the pressure I would like to get. Thanks!

 

[link1896]

Was adjusting the IP on a old Mares MR12 for workshop duties, can easily achieve 300psi IP. This reg will never see water again, dedicated to workshop use.