Banjo Fitting & Modern SPG

[rstofer]

I have the VDH banjo fitting USD Chrome Banjo Fitting [Chrome Banjo] - $35.00 : Vintage Double Hose!, Your online source for all things related to vintage diving but, of course, it is for a vintage pressure gauge - 3/8" fitting.

I also have the #RHAD Hose Adapter Two Hose Regulator Hoses Clamps Mouthpieces Duckbills Parts to convert the 3/8" fitting to 7/16".

However, the o-ring leaks when I pressurize it to 3000 psi. Has anyone else had a problem? If so, what is the solution?

Thanks
Richard

 

[herman]

I have a similar adapter that I use with a PRAM, so far it works fine. I would inspect the mating surfaces carefully for problems and change the Oring.

 

[Nemrod]

I have the VDH banjo fitting USD Chrome Banjo Fitting [Chrome Banjo] - $35.00 : Vintage Double Hose!, Your online source for all things related to vintage diving but, of course, it is for a vintage pressure gauge - 3/8" fitting.

I also have the #RHAD Hose Adapter Two Hose Regulator Hoses Clamps Mouthpieces Duckbills Parts to convert the 3/8" fitting to 7/16".

However, the o-ring leaks when I pressurize it to 3000 psi. Has anyone else had a problem? If so, what is the solution?

Thanks
Richard

I don't follow????? what is leaking where?

N

 

[rstofer]

I don't follow????? what is leaking where?

N

The air leaks past the o-ring and comes out where the adapter mates to the banjo.

As a very rough guess, it appears that the bevel for the o-ring in the banjo is machined too deep. This allows the adapter to bottom out before the o-ring is fully compressed.

When I use a regular HP port plug on the banjo, it seats quite far down and it doesn't leak.

Richard

 

[Nemrod]

Well, hmmm, never had that issue before. You might have to carefully reface the banjo port to make it more shallow by removing a small amount of material. You might also get a thicker O ring from my favorite LDS--Tractor Supply.

So, you are screwing an adapter into the banjo and then the LP hose into the adapter?

N

 

[rstofer]

So, you are screwing an adapter into the banjo and then the LP hose into the adapter?

N

Typo? It is a HP hose for my SPG. That part works fine.

Good idea on the thicker o-ring. My LDS has drawers and drawers of o-rings.

I don't have a lathe so I am not keen on machining the banjo. If a larger o-ring doesn't solve the problem, I'll give VDH a call. I'm sure there is a solution. It works for others!

Richard

 

[Nemrod]

Typo? It is a HP hose for my SPG. That part works fine.

Good idea on the thicker o-ring. My LDS has drawers and drawers of o-rings.

I don't have a lathe so I am not keen on machining the banjo. If a larger o-ring doesn't solve the problem, I'll give VDH a call. I'm sure there is a solution. It works for others!

Richard

LOL, I would use a file, when I got my A&P (a royal PITA) we had to make an absolutely perfect cube two inches by two inches by two inches from a big, rough, chunk of aluminum. The cubes took most of us weeks as a spare time project. No perfect cube, no A&P. A man and a good file is a weapon. N

N

 

[rstofer]

This problem is going to go away! Bryan at VDH says he hasn't heard of such a problem but, just in case, he is going to make up a fitting set that is known to work and send it to me. I'll send him mine to look at.

Not only are his rebuilt regulators a work of art, his customer service is just outstanding.

I'm really looking forward to having him rebuild my DA AM with the Phoenix nozzle.

Richard

 

[Luis H]

This problem is going to go away! Bryan at VDH says he hasn't heard of such a problem but, just in case, he is going to make up a fitting set that is known to work and send it to me. I'll send him mine to look at.

Not only are his rebuilt regulators a work of art, his customer service is just outstanding.

I'm really looking forward to having him rebuild my DA AM with the Phoenix nozzle.

Richard

I have heard that before...actually, I can confirm the customer service part.

I service my own regulators, so I haven't directly seen his repair work, but I am sure that his reputation is well deserved.

 

[Nemrod]

I am happy to hear the good news, of course the customer service is top notch, it is vdh, our virtual lds.

N