Help me identify this valve

[tbone1004]

That's a better response than ''skinny''

For the OP...long past time for a new valve/cylinder...

eh, we've always just called them skinny neck. The only other one you ever really see is the really old 1/2" NPT LP72 bottles.

Why do you say long past time for a new cylinder? Those bottles are still perfectly usable and aren't necessarily all that old

 

[UnderwaterOrkinMan]

We need pictures of the top of the blown burst disk and any markings on the front of the valve to attempt to identify which burst disk. Also what is the tank rated to? The burst disk on the right looks like it is for a Sherwood Genesis valve not the valve that you have.

Yes that is exactly which one that is.

 

[W W Meixner]

eh, we've always just called them skinny neck. The only other one you ever really see is the really old 1/2" NPT LP72 bottles.

Why do you say long past time for a new cylinder? Those bottles are still perfectly usable and aren't necessarily all that old

TB...

My primary concern would be having a ready source for quick/easy field repairs...

For these kind of pieces...you need to be well stocked with reliable spares...because dive shops...either local or destination are not going to be able to help you...

Just me...but I would not keep/use pieces like these...the OP's dilemma is a prime example...if this type of equipment constitutes bragging rights...there's not much to brag about...

The prime reason RB divers keep so many spare/service parts on hand is because you can't get what you need...when you need it the most...you need to be able to make field repairs...

W...

 

[tbone1004]

@W W Meixner
how many valve parts do you need to keep? The skinny neck just means the tank neck o-ring is nonstandard, but that's not something you normally deal with since it's static. The burst disc IIRC is the same one used by Thermo and pretty much everyone else.
The specific parts are going to be the o-rings and the seat, but keep a valve rebuild kit laying around and you're good to go. No reason to take a valve to a technician, they're field serviceable without draining the tank for everything except the burst disc, neck o-ring, and valve seat. Those three parts are the least likely to fail.
OMS/Blue Steel Valve Parts

in this case, I think it's the 3-piece burst disc system where you can just replace the disc itself, but that's why I said to call John because I can't remember definitively which one it is. Mine have all been replaced with 1-piece plug assemblies.

 

[UnderwaterOrkinMan]

Ok wow. I didn’t think this would get so many opinions. It is OMS. It is HP steel 120. 7/8 neck. It is on a manifold. The picture shows the blown plug next to a genesis plug. Appear to be same diameter just finer thread pattern. If I can figure out what I need I’ll just order plenty. These tanks are mint inside and out and valves are smoother than a new one. I just wanted help getting replacement burst disc/plugs. I don’t have a Single piece of dive equipment for the purpose of “bragging rights”. I’m not even sure what that means.
markings I have found.
OMS 18-ii ps300bar

 

[tbone1004]

Ok wow. I didn’t think this would get so many opinions. It is OMS. It is HP steel 120. 7/8 neck. It is on a manifold. The picture shows the blown plug next to a genesis plug. Appear to be same diameter just finer thread pattern. If I can figure out what I need I’ll just order plenty. These tanks are mint inside and out and valves are smoother than a new one. I just wanted help getting replacement burst disc/plugs. I don’t have a Single piece of dive equipment for the purpose of “bragging rights”. I’m not even sure what that means.
markings I have found.
OMS 18-ii ps300bar

call John, tell him what you need and he'll take care of you. He'll know exactly what you need off the top of his head.

 

[UnderwaterOrkinMan]

John at Northeast Scuba had me right in about 15 seconds. “Those numbers don’t mean $%#! this is what you need”

Thank you all.

 

[W W Meixner]

@W W Meixner
how many valve parts do you need to keep? The skinny neck just means the tank neck o-ring is nonstandard, but that's not something you normally deal with since it's static. The burst disc IIRC is the same one used by Thermo and pretty much everyone else.
The specific parts are going to be the o-rings and the seat, but keep a valve rebuild kit laying around and you're good to go. No reason to take a valve to a technician, they're field serviceable without draining the tank for everything except the burst disc, neck o-ring, and valve seat. Those three parts are the least likely to fail.
OMS/Blue Steel Valve Parts

in this case, I think it's the 3-piece burst disc system where you can just replace the disc itself, but that's why I said to call John because I can't remember definitively which one it is. Mine have all been replaced with 1-piece plug assemblies.

TB...

Agree fully...well sort of...you don't need any...until you need something...and having what you need is always better than not...

Especially important...if you buy recycled/used gear...and the more the seller advertises that the part(s) are ''like new/just serviced/dive ready/owned by a professional...the more concerned you need to be...

W...

 

[tbone1004]

TB...

Agree fully...well sort of...you don't need any...until you need something...and having what you need is always better than not...

Especially important...if you buy recycled/used gear...and the more the seller advertises that the part(s) are ''like new/just serviced/dive ready/owned by a professional...the more concerned you need to be...

W...

but when the only "unique" part is the cylinders neck o-ring, why would you recommend replacing the tanks?

 

[W W Meixner]

but when the only "unique" part is the cylinders neck o-ring, why would you recommend replacing the tanks?

TB...

Referencing the OP's circumstance only...not being a vintage gear diver/specialist...he is going to run into trouble time and time again...not to mention paying through the nose for what he doesn't know keeping old pieces in serviceable condition...even finding neck ''O'' rings will be a challenge...

Just my opinion...but this is no way for a novice...if in fact he is a novice to get started...these pieces aren't vintage...for vintage sake...they're just old/obsolete...there is a better way...and dollar for dollar...the better way is a better way...you can throw money at these pieces until you're blue in the face...and in the end...their still old/obsolete...with questionable..if any...value...

Cylinder/valves like this came into my former employers shop from time to time...either...donated/trade/other...they went directly to the scrap cylinder/valve storage room...and then to the scrap yard...

W...