How Do You Seal A Leaking Set Screw Huben Dream Valve?

[Hate The Rain]

Just replaced the plenum o-rings in my Huben Dream Valve 7075. Had another problem that I posted earlier and that seems to be cured. One of the 4mm x 4mm set screws at the plenum swivel was leaking before the new internal o-rings and is still leaking after their replacement.

My fingers are to fat to be able to wrap the set screw with teflon tape. My guess is that there shouldn't be any air where the set screws are located, but the o-ring replacement didn't slow down the leak at all. It is only leaking from 1 of the two set screws. I am contemplating taking it apart again and tapping the hole to a larger set screw and see if that will stop the leak.

Does anyone have suggestions for curing the leak?

Thanks

 

[Ydunn.223]

Find a teflon tape called Blue Monster its the best - Amazon an Lowes carry it

 

[TnCnDn]

Just replaced the plenum o-rings in my Huben Dream Valve 7075. Had another problem that I posted earlier and that seems to be cured. One of the 4mm x 4mm set screws at the plenum swivel was leaking before the new internal o-rings and is still leaking after their replacement.

My fingers are to fat to be able to wrap the set screw with teflon tape. My guess is that there shouldn't be any air where the set screws are located, but the o-ring replacement didn't slow down the leak at all. It is only leaking from 1 of the two set screws. I am contemplating taking it apart again and tapping the hole to a larger set screw and see if that will stop the leak.

Does anyone have suggestions for curing the leak?

Thanks

Permatex, lightly and dry

 

[mil]

Must be a leak somewhere else. Those set screws don't see air pressure.

 

[Hate The Rain]

Thanks for the replies. I think I will take it apart again and really inspect the plenum inner two seal surfaces and see if there are any flaws or cracks. If nothing, then I'll put new orings in again, and try the permatex route. Beginning to think I got a lemon of a Huben Dream Valve.

 

[Ratzy]

Contact Nick Scott at Huben Power
[email protected]
He usually can answer or get the answer

 

[Hate The Rain]

Thank you. Have worked that direction. Can't remember my order number from December, I found there invoice and charge to my cc and passed that along, but no progress made. They seem a little hesitant. Guessing they think I bought the Alibaba version. Even though I just purchased and received another cricket valve from them. Oh well, half the fun is the tinkering. I just hope I can figure out what is causing the leak. Would hate to think I wasted $180.00. Thanks for the suggestion though.

 

[Ratzy]

Thank you. Have worked that direction. Can't remember my order number from December, I found there invoice and charge to my cc and passed that along, but no progress made. They seem a little hesitant. Guessing they think I bought the Alibaba version. Even though I just purchased and received another cricket valve from them. Oh well, half the fun is the tinkering. I just hope I can figure out what is causing the leak. Would hate to think I wasted $180.00. Thanks for the suggestion though.

There is an 8mm hex in the base of the chamber that screws on the gun. You can remove the whole plenum section.

Been quite some time since I did surgery on a Dream valve but I seem to remember an oring in that base.

 

[Hate The Rain]

Thank you. Took it apart again yesterday. With what limited measuring tools I have, it seems the inner piece that has the 8mm hex in it maybe milled slightly off. Or the outer tube might be off. The tube is 27 mm id ish. With 6 o-rings tested, the od with the o-ring mounted was 27.15 mm ish. 6 different tries with new o-rings and the set screw still just bubbles away. It seems like Huben may have some quality issues. I will continue to mess with it, but I am slowly accepting the reality that it is just a leaky Notos Dream Valve. I will probably grind the set screw down and permatex red in place and only use one set screw.

 

[Ratzy]

Not sure they have quality issues. I have 3 Dream Universal and 3 Max-ATH Universal and all work flawless.

I was the one of the first to buy a Dream Universal and found a design error, they milled the plenum to gun Oring plane at an angle instead of squared. They engineered and milled a new plenum and shipped it to me at no cost.

 

[Hate The Rain]

I am glad to hear it went well for you. Interesting about the plenum to gun connection. That was my first problem. It kept blowing o-rings, 3 times. Finally ended up curing it with a slightly smaller o-ring that fit into the angle better and was completely captured, now no leaks.

I have admit my lack of being able to get a seal inside the plenum is a head scratcher. I am no engineer nor to bright, but I make up for it with persistence.

Hopefully, the new cricket I purchased will follow the path that you have had, no issues. But I still stick to my having ended up with a Dream Valve that isn't quite there yet.

But I am always open to suggestions for things to try. I may complain, but I also like to try and provide a solution for the problem so I'm not just whining.

Thanks again for all your time and help.