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Need to braze some fittings - SilPhos15 or Stabrite??

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Need to braze some fittings - SilPhos15 or Stabrite?? henny 11-25-2006
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Posted by Noon-Air on November 26, 2006, 4:04 pm

> What's best for refrigerant fittings Staybrite silver solder or
> SilPhos15?
>
> No gap filling needed. These are standard copper connection fittings
> vs repairs.

What kind of torch are you using??
What refrigerant is in the system??
What part of the refrigerant system??

Are you *SURE* its all copper?? and not copper clad or plated??



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Posted by henny on November 26, 2006, 4:44 pm
Turbo torch + MAPP gas, R22, suction and liquid line set to new coil
and condensor.

It seems like a mix of opinions. Some prefer SilPhos and others swear
by Stay Brite. Some even use soft solder but I discount those as
hacks.

The brazing heat from SilPhos weakens the fittings. Others say that
the Stay Brite flux can hurt the system however Nitrogen flow isn't
needed for the Stay Brite.

wrote:

>
>> What's best for refrigerant fittings Staybrite silver solder or
>> SilPhos15?
>>
>> No gap filling needed. These are standard copper connection fittings
>> vs repairs.
>
>What kind of torch are you using??
>What refrigerant is in the system??
>What part of the refrigerant system??
>
>Are you *SURE* its all copper?? and not copper clad or plated??
>


Posted by Noon-Air on November 26, 2006, 4:51 pm

> Turbo torch + MAPP gas, R22, suction and liquid line set to new coil
> and condensor.
>
> It seems like a mix of opinions. Some prefer SilPhos and others swear
> by Stay Brite. Some even use soft solder but I discount those as
> hacks.
>
> The brazing heat from SilPhos weakens the fittings. Others say that
> the Stay Brite flux can hurt the system however Nitrogen flow isn't
> needed for the Stay Brite.

My personal preference is to use oxy-acetylene with 15% silphos(no flux) on
copper - copper, and 45% silver (with paste flux)on copper - brass or
copper - coper clad/plated. I normally use a #2 tip up to 3/4 inch copper,
above that I use a small rosebud.

> wrote:
>
>>
>>> What's best for refrigerant fittings Staybrite silver solder or
>>> SilPhos15?
>>>
>>> No gap filling needed. These are standard copper connection fittings
>>> vs repairs.
>>
>>What kind of torch are you using??
>>What refrigerant is in the system??
>>What part of the refrigerant system??
>>
>>Are you *SURE* its all copper?? and not copper clad or plated??
>>
>



Posted by Jake on November 26, 2006, 7:50 pm
Noon-Air wrote:

> My personal preference is to use oxy-acetylene with 15% silphos(no flux) on
> copper - copper, and 45% silver (with paste flux)on copper - brass or
> copper - coper clad/plated. I normally use a #2 tip up to 3/4 inch copper,
> above that I use a small rosebud.
>

A 2 tip on that smaller stuff and oxy-acet? Man... you're good.

What's the gas mix on that rig? I got the job done with the same setup
but boy it was HOT. My test piece got melted (-;.

I'm interested in what kind of torch handle you use to get into those...
tight places (Paul, don't start)?

And what kind of rosebud?

Jake

Posted by Noon-Air on November 26, 2006, 8:20 pm

> Noon-Air wrote:
>
>> My personal preference is to use oxy-acetylene with 15% silphos(no flux)
>> on copper - copper, and 45% silver (with paste flux)on copper - brass or
>> copper - coper clad/plated. I normally use a #2 tip up to 3/4 inch
>> copper, above that I use a small rosebud.
>>
>
> A 2 tip on that smaller stuff and oxy-acet? Man... you're good.

Nahhh..... I'm just practicing :-)
In my younger days, I used to could do a single pass gas weld on 3/8 inch
thick steel with 95% penetration.

> What's the gas mix on that rig? I got the job done with the same setup but
> boy it was HOT. My test piece got melted (-;.

I normally run 6psi on the acetylene regulator, and 10 psi on the oxy
regulator. I like a hot fire, it gets the job done quick with all the heat
right where I want it and a lot less chance of getting everything else in
the area too hot. I like to use wet paper towls to keep near by componants
from overheating... like service valves.
In theory, the paper when if it gets dried out will burn befor the valve
seals do.... never had it take that long before... even on 1 1/8 inch
copper.

> I'm interested in what kind of torch handle you use to get into those...
> tight places (Paul, don't start)?

Its just your basic Uniweld portable torch kit. The rosebud was extra.

> And what kind of rosebud?

On the rosebud it says its a #15 if that helps... they have them at the
supply houses that carry commercial and refrigeration stuff for brazing
larger diameter copper pipe. They had a little "shorty" tip that was about 3
inches, I opted for the longer that is about 7 inches. FWIW, there are a lot
of places where its a lot easier to get a long tip into than you whole hand,
torch, and tip. Its kinda like using a screwdriver.... *most* of the time I
will grab the long one, unless all I can fit is a stubby.

> Jake



Page 3 of 4       < 1 2 3 > last >>
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