Conshelf 21 parts

[mattjm]

Picked up an old Conshelf 21 for $30 that I'm going to use to develop my reg. servicing skills. I've checked ebay and various old threads here for parts sources, but coming up short so far. I'm hoping someone here can point me in the right direction or hook me up...

vintagedoublehose seems to have the proper HP seat but I still need a second stage seat and maybe the first stage diaphragm. Does any know the official size of the two o-rings in the spring block, and a possible source (i.e. is the hardware store just as good if it's the proper size and oxygen compatible)?

Thanks,

Matt

 

[herman]

Hi Matt,
The HP seat at VDH is likely not the correct one. If the HP seat you are looking at is for a DA Aquamaster it looks (on the web) a lot alike but it is differnet. The DA first stage is not balanced, the Conshelf has a balanced first stage.
I would not use hardware store varity Orings, there is no telling where they were made or to what quality. Buy them from an industrial supply. Unless you intend to use the reg for pure O2, special Orings like vitron are really not necessary.

 

[mattjm]

this is the HP seat at VDH:

Conshelf / RAM high pressure seat [Blue Conshelf Seat] - $15.00 : Vintage Double Hose!, Your online source for all things related to vintage diving

they say it's the latest conshelf seat, and it appears to have the air passage for balancing.

 

[herman]

Your right, forgot Bryan had those. They should do nicely. If yours is in reasonable shape you can resurface it by very carefully polishing it with 1500 grit sand paper taped to a pane of glass.