Help identifying a Scubapro 1st stage

[tamas970]

I bought a full second hand setup, with two scubapro 1st and 2nd stages.
The 2nd stages seem to be R109-s, which are keepers - as far as I learned
from other topics.

For the 1st stage I need some help for identification, that I can buy a maintenance kit:


(1 High pressure, 4 Low pressure output, Scubapro)

Can I use it with 300bar and/or nitrox? (most extreme conditions I can think of)

 

[Fishpie]

MK5
There aren't ant yokes that are rated for 300BAR......you'll need a DIN converter for that pressure.
What pressure does it say on the yoke?
Any reg is good for 40% nitrox without any modifications.

---------- Post added January 3rd, 2013 at 09:59 AM ----------

It's most likely an early 2 LP port MK5 that has had a (medium) 3000psi yoke and 4 LP port turret added on the early 80's.

 

[tamas970]

Thanks! I'll check the pressure sign. I haven't seen any 300bar rental tanks
where I dive anyway. I guess 200bar/3000psi should not be an issue.

As for being a hybrid mk2 vs mk5: can I use an mk5 repair kit for it?

 

[kwinter]

I don't believe that is even the 200 bar/3000 psi clamp. The earliest ones were lower pressure. Although they look alike, there is a difference in thickness and weight.

As for a DIN conversion, good luck finding one. I've been looking for years for a couple I still have in yoke. There is an aftermarket conversion sold by Trident, but it doesn't fit over the saddle.

 

[Fishpie]

It's not a hybrid....MK5's came with 1, 2, 4 and 5 ports......the ones with 2 ports were quite frequently converted to the multiport turret.
The fact that the body of yours has a single HP port indicates it probably has had the turret upgrade and it might well have had a stronger yoke fitted.....the fact that it is the 4 port turret makes me think it would have the Medium 3000psi yoke fitted.

---------- Post added January 3rd, 2013 at 10:56 AM ----------

Personally I would look for a nicer 5 port heavy yoke MK5 with 2 7/16th HP ports to spend my time on.
Clean MK10's are a dime a dozen on eBay.....late model MK5's a little more.

 

[redacted]

That yoke appears to be the version with the 7/16 yoke screw that is marked "3000". Scubapro now recommends it be used with a maximum pressure of 2475 psi. But I am still using them on 3000 psi tanks with no problem.

The Mk25 din kit can be used on a Mk5 but it will require the use of about 2mm worth of spacer washers between the body and the din retainer. I also had to trim some plastic from the Mk25 saddle to keep it from binding the handwheel.

 

[Fishpie]

Here's what I think you have:
Scuba Diving Regulator Scubapro MK5 Just Serviced See Details Clost to Mint | eBay

 

[superstar]

I agree with Fishpie as it is an older body with upgraded yoke and turret.

 

[tamas970]

The fellow I bought it from used it with 200bar (=3000psi) tanks, that also speaks for a modified version. Next step is that I take it apart, that should reveal the real history of the part

 

[redacted]

The fellow I bought it from used it with 200bar (=3000psi) tanks, that also speaks for a modified version. Next step is that I take it apart, that should reveal the real history of the part

No it does not. Even the lightest yoke will often work with a 3000 psi tank. And the failure mode, should that occur, is a deformation of the yoke until it will no longer seal. The body and internals will handle the pressure. More telling is the single HP port that is 3/8 rather than 7/16 which will require an adapter for use with modern connectors. Although there are still some sources for HP hoses with 3/8 connector.