strange stuff on valve

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lermontov

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does anyone know what this is -found on the valve while doing visual - tank was a 12l steel and only had air and trimix in it
 

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Did you do a taste test?
no what are you trying too ascertain
 
just heard back from a tank specialist - hes seen it 2-3 time and reckons its moisture left in tank from last hydro causing microscopic rust particles that have gathered around the valve from crystal lube or hand grease
tank hasn't been used fro 2-3 months

inside of the tank is clean, stuff just around the valve
 
just heard back from a tank specialist - hes seen it 2-3 time and reckons its moisture left in tank from last hydro causing microscopic rust particles that have gathered around the valve from crystal lube or hand grease
tank hasn't been used fro 2-3 months

inside of the tank is clean, stuff just around the valve
That was going to be my next guess…
 
just heard back from a tank specialist - hes seen it 2-3 time and reckons its moisture left in tank from last hydro causing microscopic rust particles that have gathered around the valve from crystal lube or hand grease
tank hasn't been used fro 2-3 months

inside of the tank is clean, stuff just around the valve
That is a "sheet ton" of grease on that valve in places that shouldn't have grease. I am dubious of the "tank is clean" conclusion. I would start from scratch, light tumble and wash with simple green, completely disassemble and wash the valve. Re lubricate only where required and reassemble
 
"moisture left in tank from last hydro"

Why would this happen? Can't they dry the cylinders? Not much more than compressed air is required.

Are you sure your compressor is not to blame?
 
"moisture left in tank from last hydro"

Why would this happen? Can't they dry the cylinders? Not much more than compressed air is required.

Are you sure your compressor is not to blame?
extremely unlikely no other tanks have it ( ones that ive checked -im checking dil tanks today )
 
https://www.shearwater.com/products/teric/

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