3000psi valve in a 3442 tank?

[Joe the plumber]

I just bought 2 new xs x7-100 steel tanks rated for 3442psi. The convertible din/yoke vavle says 3000psi on it. Is this the proper valve to get a full fill of 3442? I just had them filled today by a different dive shop then I got them from and they told me they were the wrong valves?!!?? Also told me if he would have noticed it before filling them he would have refused to fill them. Says I will have burst disc troubles with these valves? Thoughts?

 

[OldNSalty]

New you say? That is strange. I don't think it really matters what the valve says-its which burst disk is in there. I'm not sure the disk would give at 3500psi anyway but even if it did....I don't see what the problem is for the guy filling the tank. Now if it were reversed and more of an extreme....a valve with a burst disk at 3500 on a tank rated to...I don't know-1500 (if such a think exist) then I could see where there might be concern....but honestly, I don't own a fill station so I don't really know.

 

[Superlyte27]

the only issue that could arise is a burst disk failure, but hardly likely. Next time the tank is close to empty, bleed it off and put the proper burst disk in.

 

[Joe the plumber]

on the chrome burst part It says 3000 B 5000

 

[Glenn08]

The proper burst disc is critical. During a hydro test the tank is pressurized to 5/3 of the working pressure. The burst disc must release before the pressure reaches 166% of the working pressure, and usually at 150% of the working pressure. Did the shop that installed a 3000 psi valve in a 3442 psi tank not say anything about the mismatch ?

 

[Joe the plumber]

The proper burst disc is critical. During a hydro test the tank is pressurized to 5/3 of the working pressure. The burst disc must release before the pressure reaches 166% of the working pressure, and usually at 150% of the working pressure. Did the shop that installed a 3000 psi valve in a 3442 psi tank not say anything about the mismatch ?

no nothIng

 

[mahjong]

Post a pic of the valve, if possible.

 

[redacted]

The more difficult problem is reliably getting a fill op to fill them to 3442 if they see a valve that says 3000 regardless of what the tank and the burst disk may say. Have the shop that sold them to you install the correct valve that you payed for or you will never know when a fill op will use it as an excuse to not give you 3442 psi.

BTW, your valve is not used during a hydro so no problem there.

 

[Joe the plumber]

The valve says VX 5000

 

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[h=1]XS Scuba 100 Cubic Foot High Pressure Steel Scuba Tank[/h]Eligible for Free Standard Shipping on orders over $25 Customer reviews see below Welcome to the next generation in cylinder technology - High Pressure tanks that are compatible with any regulator. Includes Pro Valve-Standard Yoke and DIN Compatible FREE Visual Inspection Program (VIP) Included! Nitrox Ready up to 40% (the recreational limits of nitrox) 3442 PSI I

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