Buying a used tank?

[dogglebe]

I have the opportunity to purchased a ss Sherwood Genesis 120cf tank for $150. The seller says the tank is within date for hydro and VIS.

Is this considered a good deal? Is it worth the chance? I used to service fire extinguishers and can find external damage easily enough.


Phil

 

[Scared Silly]

It is probably a true HP cylinder so it will be full at 3500psi and will be DIN only. (Further the valve will be 7/8-14 UNF rather than the more common 3/4). If your reg is yoke it will have to be converted to DIN. I would say it is descent enough price. With any used cylinder I would drain it and take a peek inside.

 

[dogglebe]

You're right about the valves. Would it be cost efficient to convert the the reg in addition to buying the tank?


Phil

 

[mike_s]

It is probably a true HP cylinder so it will be full at 3500psi and will be DIN only. (Further the valve will be 7/8-14 UNF rather than the more common 3/4). If your reg is yoke it will have to be converted to DIN. I would say it is descent enough price. With any used cylinder I would drain it and take a peek inside.

Genesis steel tank. It's also most likely an "Arashi" (spelling?) spun steel tank made in Japan. heavy as heck compared to other steel tanks.

to the original poster, some folks like these, some don't.

do a little Googling and you'll see.

You're right about the valves. Would it be cost efficient to convert the the reg in addition to buying the tank?
Phil

depends on the reg. Some are easy and cheap and some would run you $150 bucks or more.

You could always put a 3442psi Convertible DIN/Yoke valve on it. AND ONLY FILL IT TO THAT AMOUNT. But some people will see this as using as "undersized fuse" as the valve isn't rated for a true 3500psi. (but in my opinion, it's no big deal as the burst disc is rated for much much higher than that.)


$150 isn't bad, but if you've got to buy another valve, add $50-60 bucks. So then you've got $200 hundred in it.

is it worth $200, or would you rater put that towards a brand new tank?

 

[Scared Silly]

You could always put a 3442psi Convertible DIN/Yoke valve on it.

To my knowledge there is no such beast of a valve. The only DIN/Yoke convertible valves are 3/4". The 7/8" valves will be 300 DIN unless modified. Which some have done.

 

[spectrum]

To my knowledge there is no such beast of a valve. The only DIN/Yoke convertible valves are 3/4". The 7/8" valves will be 300 DIN unless modified. Which some have done.

Though there are said to be a few rogue yoke valves out there that would fit that cylinder you are for all intents and purposes correct.

In some cases 3/4PT valves have been machined for the 7/8 port.

I would not bother with either adaptation.

Pete

 

[spectrum]

I have the opportunity to purchased a ss Sherwood Genesis 120cf tank for $150. The seller says the tank is within date for hydro and VIS.

Is this considered a good deal? Is it worth the chance? I used to service fire extinguishers and can find external damage easily enough.


Phil

Some are also PST, look for the Pst in the stampings.

Are yours hot dipped as a finish or were yours painted over the galvanized finish?

We have some 100s of each. Also some have valves with the outlet canted up at 45 degrees.

That's at the high end of the decent deal range for not being freshly vis & hydro. In any case it's way less than 1/2 the cost of comparable new.

Pete

 

[mike_s]

To my knowledge there is no such beast of a valve. The only DIN/Yoke convertible valves are 3/4". The 7/8" valves will be 300 DIN unless modified. Which some have done.

Excellent point. They would be different size thread holes. Thanks for the correction.

 

[halocline]

You could always put a 3442psi Convertible DIN/Yoke valve on it. AND ONLY FILL IT TO THAT AMOUNT. But some people will see this as using as "undersized fuse" as the valve isn't rated for a true 3500psi.

Are you saying that a convertible valve can't somehow handle the additional 58 PSI? Come on. Valve "ratings" are pretty meaningless, they can all handle far more pressure than the tank. Or did I miss something?

 

[mike_s]

Are you saying that a convertible valve can't somehow handle the additional 58 PSI? Come on. Valve "ratings" are pretty meaningless, they can all handle far more pressure than the tank. Or did I miss something?

it'll handle it. the burst disk is rated to 5/3rd's I think. (without looking it up).

However, read the above and you'll see that the convertible valves aren't available in the same thread hole size.