just got my first regulator set

[Solly]

I found in the technical specs that there is 2 values to consider, IP @ 300 bars and IP at 20 bars. I am checking again as the figures I see are exactly identical for both cases... is that normal to have the same IP for 300 bars tank and 20 bars tank? I am of no experience of regulators but seems strange to me, I would expect some difference in the value... any idea?
Thanks

 

[Puffer Fish]

At some point the IP will begin to drop as the tank pressure goes too low...

Basically, this is the pressure your second stage sees.. so it would be nice if it stayed constant.

You have it correct.

Note: If this did not stay reasonably constant, the second stage would vary in how it breathed.

 

[Fishpie]

Don't worry about finding a 300 BAR (4000+psi), have the IP set with a full tank and then check it again with a nearly empty tank (500psi)
.....most manufacturers don't bother with the low pressure check, Poseidon with their history of unbalanced diaphragm regs still use this spec even though it isn't that relevant with balanced first stages.

 

[Hallmac]

Thanks Hallmac, its a relief it is just a tuning issue. The specs say that IP is 8.5-9 bars for a tank pressure of 300 bars. Is that a linear relation, meaning if I set a tank at 200 bars, how would the 8.5-9 differ?

No it is not linear. it is a range value. Set it between the two values and you are good to go.

Don't worry about the working pressure of the cylinders, it can handle the difference between 200 and 300 bars.

The Reason there is a 20 bar IP is cracking resistance at low tank pressures. It is there to help tune the second stage for maximum performance.

 

[Solly]

WOW, the kind of support you guys give is amazing... thanks a million
I will update the thread when I do it

 

[Solly]

I got the IP gauge and tuned the screw such that the IP seen is conforming with the specs.
As now my problem is solved and I will dive with my new reg set very soon, a small question popped to my mind... what would have happened if I go diving with the IP not the recommended ? would it differ if higher or lower than the intended IP?

Thanks
MS