valve ID please

[stepfen]

After about 2 years of use, the neck o-ring of my pony tank started leaking.
The tank is an MES 7lt aluminum one and the valve is the one that came with it when I bought it.
I remember reading somewhere that the neck o-rings used by this factory are of very low quality and they disintegrate within a couple of years (!) especially if used with high O2. So my time has come.
Btw my tank have had only 2 fills so far by me: one with air when I bought it and another one with 28% nitrox (continuous flow blending) about 6 months ago.

I could replace just the neck o-ring but the knob is becoming stiff too hence I am thinking to service the whole valve.
The problem is I don't have the slightest idea of what kind of valve this is. Can somebody identify it and point me to a service kit or something?
In particular I would be interested to know if internally it uses just o-rings (that I can potentially clean, inspect and reuse), or does it use copper gaskets etc that need replacement.
Any info welcome.
Thanks a lot!

 

[happy-diver]

Mate really just pull it apart clean it up and buy some orings for it

 

[BoltSnap]

It is a standard M25X2, EN144-1, 232 Bar valve. Nothing special about it. The tank neck/valve o'ring is a standard o'ring.

Connect with this guy and he will help you (They are in Cyprus) or go to your local dive center for service. It isn't rocket science:

Scuba Supply Parts - Scuba Diving Repair | Scuba Gaskets

Cost-effective, easy-to-use parts, service kits, and tools worldwide, ensuring your underwater adventures are safe and memorable. Shop our scuba supplies now.

scubagaskets.com

@Scubagaskets

 

[stepfen]

Mate really just pull it apart clean it up and buy some orings for it

It is a standard M25X2, EN144-1, 232 Bar valve. Nothing special about it. The tank neck/valve o'ring is a standard o'ring.

Connect with this guy and he will help you (They are in Cyprus) or go to your local dive center for service. It isn't rocket science:

Scuba Supply Parts - Scuba Diving Repair | Scuba Gaskets

Cost-effective, easy-to-use parts, service kits, and tools worldwide, ensuring your underwater adventures are safe and memorable. Shop our scuba supplies now.

scubagaskets.com

@Scubagaskets

I am servicing my own gear (few valves, few regs etc) hence I know that (usually) it is not rocket science.
Problem is that I am using this tank quite often, hence I want to minimize downtime. Finding "special" parts where I live can take time, so I would prefer to know what parts might be needed before I start.
Cheers

 

[stepfen]

I forgot to mention about scubagaskets. It is quite probable that eventually I will not need any parts (the valve is quite new - I should be able to reuse the parts) hence, knowing I will probably won't buy anything eventually, I hesitate to ask/disturb professional people.

 

[BoltSnap]

You are going to have to replace the o'ring and if you are going to overhaul the valve, there are few parts that need replacing.

 

[stepfen]

Ok, fount it. Valve is a Polaris 12144 (it was written on it - silly me).
Here is the schematic:

All parts should be reusable or easily sourced locally.

Thanks a lot

 

[PBcatfish]

If you are loading nitrox, you will want an oxygen compatible O-ring material (like Viton). Tank neck O-rings are usually specified to be a hard grade of rubber (like 90 shore A Duro) & not the usual soft (60 Duro) material that you normally find at a hardware store. You want the correct size, material & hardness. All 3 matter.

I would need to measure the counter-bore diameter & depth in your tank neck before knowing what size O-ring would be proper for that tank. There are a few different possibilities where I live. The presumptions that others have made about size may be correct. I don't know.