help with parts

[gair]

i need an adapter, 3/8 male to 7/16 female so i can add it to a high pressure hose and connect to a hw tank valve. also need 2250 tank valve burst disks, the old style.  just the disk, not the hole burst disk assembly.  can trade 3000 psi burst disks and other adapter or a old snorkair.  Also i want to give away that old 40 fathom voit reg.    thanks gair

[scubalawyer]

Jan 9, 2020 10:02:50 GMT -8 gair said:

i need an adapter, 3/8 male to 7/16 female so i can add it to a high pressure hose and connect to a hw tank valve. also need 2250 tank valve burst disks, the old style.  just the disk, not the hole burst disk assembly.  can trade 3000 psi burst disks and other adapter or a old snorkair.  Also i want to give away that old 40 fathom voit reg.    thanks gair

vintagedoublehose.com/store/#!/Pressure-gauge-adapter/p/8327903

[gair]

thanks, did not realize they carried those items. gair

[cnotthoff]

They've got these too. You need to replace the entire assembly. If you replace just the disk, it will not function properly. If by "old style" you mean the ones installed with a slotted screwdriver, you should not use those. That kind, including the ones with the lead plug are very dangerous.

vintagedoublehose.com/store/#!/Burst-Disc-assembly-3-8-2250-psi/p/8445262

If it doesn't come up, search for burst.

Good Dives,
Charlie

[gair]

charlie, thanks for your input. Those old burst disks are a no,no and the modern ones are what should be used. the modern assembly appears to be a closed unit. this appears to be a safer system than what we used in the 60,70and 80. we could buy the chrome plated brass plug, the burst disk and the round ring gasket in copper or nylon in three separate items. i suspect the newer sys. eliminated any torque deformation of the burst disk with could cause early failure. i do not rebuild other peoples equipment, only my own stuff. so i am ok with using three separate items, i am just out of the round 2250 bust disks. On another subject, what type of camera is that in your photo? gair

[cnotthoff]

3-piece unit is fine as long it comes as a set. A few years back, I measured orifice diameters of a selection of plugs from my stock. Due the variation in orifice size between different brands, mixing and matching will yield different burst pressures.

Camera is a Nikon D7500 in a Nauticam housing. Since I've gotten to the point in my life where I can travel to clearer waters, I treated myself to a setup that can shoot pictures of things more than a foot away. Looks like I was shooting wide angle that day.

Good Dives,
Charlie