need help finding a high pressure fitting

[t100]

it's a bleeder valve or bleeder block.

here is what I want to do with it. I need to fill my little 20 cubic feet Argon tank from the big 250 cf tank. to do so, I need to have 2 tank valve fittings, one one each side of this bleeder valve, each hocked up to the tank. open both tank valves, pressure equalized, gas is filled from the big tank to the small tank. shut both tank valves, open the bleeder to release the pressure in the coupling, unscrew the fittings, done.


anybody has a source for that? doesn't matter stainless or brass, tanks are filled at maximum of 2500 psi.

 

[Thedroid]

Call your local gauge and instrumentation shop. Parker makes them for sure, and id imagine Swagelok does also.

 

[t100]

already tried Parker store, they don't have it.

 

[Red Green]

I have a silly question Why do you need that? Why can you just slowly remove the fitting from the tank after you close the valves? The gas will leak out there also. Just like when you remove the regulator to switch the tanks.

 

[Theloniousmonk]

already tried Parker store, they don't have it.

how much time did the counter guy spend looking for the part? I used to get h/p valves from parker all the time - for large airless paint sprayers and hydraulics. THat reminds me... check w/ a graco/titan/speeflo/spraytech/miller/wagner/devilbiss service center - they will probably have something similar floating around that may work - all those systems will pump upt to 4000psi or so...

 

[usdemt]

I have a silly question Why do you need that? Why can you just slowly remove the fitting from the tank after you close the valves? The gas will leak out there also. Just like when you remove the regulator to switch the tanks.

Especially if there is an O ring fitting just removing the pressure at the fitting will blow out that ring. I have seen guys pull of SCBA bottles from there firefighting air packs without making sure the 1st stage regulator is empty and its one heck of a pop, and then you need a new O ring. Thats assuming that you can even move the fitting to begin with. It is very hard to move fittings when they are under that kind of pressure and there are just way too many ways for stuff to fail when you are exposing a fitting to high pressures and torque it isnt designed to take. A bleed of like he is showing is designed to be loosened under pressure, most fittings are not.

 

[Red Green]

Especially if there is an O ring fitting just removing the pressure at the fitting will blow out that ring. I have seen guys pull of SCBA bottles from there firefighting air packs without making sure the 1st stage regulator is empty and its one heck of a pop, and then you need a new O ring. Thats assuming that you can even move the fitting to begin with. It is very hard to move fittings when they are under that kind of pressure and there are just way too many ways for stuff to fail when you are exposing a fitting to high pressures and torque it isnt designed to take. A bleed of like he is showing is designed to be loosened under pressure, most fittings are not.

That makes sense. Now that I think about it I have flashbacks at the regulators so I am only letting the pressure out that is in the regulator when the tank is all but empty.

 

[kams1973]

If you live near an oilfield supply house, go there.

 

[Thedroid]

Parker does make them, I ordered some for a project at work a few months ago. I even think they call them bleed valves.

 

[Pat]

Looks like a basic hydraulic flow control valve. I just bought 4 of them from a local hydraulic parts and repair place. They usually have numerous sizes and brands on ebay.