[Spehro Pefhany]

Anything better than PTFE/Teflon for high temperatures?

Just go dry or what? High temperature compressor output line... the
hose is bellows with braid over it.

[anorton]

"Spehro Pefhany" wrote in message
...
Anything better than PTFE/Teflon for high temperatures?

Just go dry or what? High temperature compressor output line... the
hose is bellows with braid over it.


There are a lot of options for very high temperature thread sealants. Search
on this term in Mcmaster for example.

However, teflon is supposed to go up to 500 deg. F. I am not an expert in
air compressors, but I would think if the output air is that hot, something
else might be getting damaged.

[Spehro Pefhany]

On Tue, 20 Nov 2012 09:03:00 -0800, "anorton"
wrote:


"Spehro Pefhany" wrote in message
.. .
Anything better than PTFE/Teflon for high temperatures?

Just go dry or what? High temperature compressor output line... the
hose is bellows with braid over it.


There are a lot of options for very high temperature thread sealants. Search
on this term in Mcmaster for example.

Okay, found one that looks good, and reasonable price ( $50 for 4oz),
thanks.

However, teflon is supposed to go up to 500 deg. F. I am not an expert in
air compressors, but I would think if the output air is that hot, something
else might be getting damaged.

At the 260°C is supposed to be maximum.. it's starting to get soft
above about 150°C.. but point taken. There's an awful lot of power
(several kW continuously in this case) going into a little bit of air.

[whit3rd]

On Tuesday, November 20, 2012 8:35:52 AM UTC-8, Spehro Pefhany wrote:
Anything better than PTFE/Teflon for high temperatures?

Auto stores stock a variety of (usually Permatex brand) sealants
in RTV silicone, including a variety of removable sealants.
If you ever replace/repair threaded fittings, the nonremovable
ones are not recommended.

[Gunner[_7_]]

On Tue, 20 Nov 2012 09:03:00 -0800, "anorton"
wrote:


"Spehro Pefhany" wrote in message
.. .
Anything better than PTFE/Teflon for high temperatures?

Just go dry or what? High temperature compressor output line... the
hose is bellows with braid over it.


There are a lot of options for very high temperature thread sealants. Search
on this term in Mcmaster for example.

However, teflon is supposed to go up to 500 deg. F. I am not an expert in
air compressors, but I would think if the output air is that hot, something
else might be getting damaged.

I simply use a teflon based thread sealer paste readily available at
any plumbing shop for ALL air connections, including those on the head
end. I hate! Hate! finding tape bits blocking solenoids and valves
downstream in CNC cabinets.

Gunner

The methodology of the left has always been:

1. Lie
2. Repeat the lie as many times as possible
3. Have as many people repeat the lie as often as possible
4. Eventually, the uninformed believe the lie
5. The lie will then be made into some form oflaw
6. Then everyone must conform to the lie

[Steve W.[_4_]]

Gunner wrote:
On Tue, 20 Nov 2012 09:03:00 -0800, "anorton"
wrote:

"Spehro Pefhany" wrote in message
...
Anything better than PTFE/Teflon for high temperatures?

Just go dry or what? High temperature compressor output line... the
hose is bellows with braid over it.

There are a lot of options for very high temperature thread sealants. Search
on this term in Mcmaster for example.

However, teflon is supposed to go up to 500 deg. F. I am not an expert in
air compressors, but I would think if the output air is that hot, something
else might be getting damaged.

I simply use a teflon based thread sealer paste readily available at
any plumbing shop for ALL air connections, including those on the head
end. I hate! Hate! finding tape bits blocking solenoids and valves
downstream in CNC cabinets.

Gunner

You would LOVE the crap one company uses on fire vehicles. It is some
type of epoxy sealant.
Does a GREAT job sealing and locking the connections together. BUT if
any extra gets loose in the system....

Nothing like stepping on the brakes with an air brake system and having
NOTHING because of a blockage.
BTDT , I ripped apart the entire system and resealed all of it. Also
installed a few filter screens in the lines.



--
Steve W.

[Stormin Mormon[_7_]]

I've used Permatex IIb non hardening, for auto gasket applications. Should
work on threads. Messy, but alcohol cleans it off skin. Not much cleans it
off clothing.

Christopher A. Young
Learn more about Jesus
www.lds.org
..

"whit3rd" wrote in message
...

Auto stores stock a variety of (usually Permatex brand) sealants
in RTV silicone, including a variety of removable sealants.
If you ever replace/repair threaded fittings, the nonremovable
ones are not recommended.

[Tom Gardner[_6_]]

On 11/20/2012 11:39 AM, Spehro Pefhany wrote:
Anything better than PTFE/Teflon for high temperatures?

Just go dry or what? High temperature compressor output line... the
hose is bellows with braid over it.



BIG PROBLEM ON THE HORIZON!!! I did exactly what you are talking about
and the temp from the output of the compressor was too high for the
braid covered hose! The hose under the SS braid disintegrated. DON'T
DO IT!

[Jim Wilkins[_2_]]

"Gunner" wrote in message
...
On Tue, 20 Nov 2012 09:03:00 -0800, "anorton"
wrote:


"Spehro Pefhany" wrote in
message
. ..
Anything better than PTFE/Teflon for high temperatures?

Just go dry or what? High temperature compressor output line...
the
hose is bellows with braid over it.


There are a lot of options for very high temperature thread
sealants. Search
on this term in Mcmaster for example.

However, teflon is supposed to go up to 500 deg. F. I am not an
expert in
air compressors, but I would think if the output air is that hot,
something
else might be getting damaged.


How about sealant for EGR pipe and oxygen sensor threads? Never-Seez
perhaps?
jsw

[Spehro Pefhany]

On Tue, 20 Nov 2012 18:44:22 -0500, the renowned Tom Gardner
Mars@Tacks wrote:

On 11/20/2012 11:39 AM, Spehro Pefhany wrote:
Anything better than PTFE/Teflon for high temperatures?

Just go dry or what? High temperature compressor output line... the
hose is bellows with braid over it.



BIG PROBLEM ON THE HORIZON!!! I did exactly what you are talking about
and the temp from the output of the compressor was too high for the
braid covered hose! The hose under the SS braid disintegrated. DON'T
DO IT!

Hi, Tom, thanks for the warning.

This stuff is 300-series stainless on the inside too- no rubber. It's
crinkled like a bellows so it's flexible and braided with stainless
braid on the outside. It's not particularly cheap, but not insane.


Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com

[[email protected]]

On Tue, 20 Nov 2012 19:06:01 -0500, Spehro Pefhany
wrote:

On Tue, 20 Nov 2012 18:44:22 -0500, the renowned Tom Gardner
Mars@Tacks wrote:

On 11/20/2012 11:39 AM, Spehro Pefhany wrote:
Anything better than PTFE/Teflon for high temperatures?

Just go dry or what? High temperature compressor output line... the
hose is bellows with braid over it.



BIG PROBLEM ON THE HORIZON!!! I did exactly what you are talking about
and the temp from the output of the compressor was too high for the
braid covered hose! The hose under the SS braid disintegrated. DON'T
DO IT!

Hi, Tom, thanks for the warning.

This stuff is 300-series stainless on the inside too- no rubber. It's
crinkled like a bellows so it's flexible and braided with stainless
braid on the outside. It's not particularly cheap, but not insane.


Best regards,
Spehro Pefhany
Greetings Spehro,
If you want high temp sealant then try this link:
http://www.flexbar.com/shop/pc/ROCKSETT-2-OZ-p4019.htm
The stuff is 10 bucks a bottle, is sold by Brownells too, and is good
enough that your stainless hose will be glowing red when the max temp
of this stuff is reached.
Eric

[Spehro Pefhany]

On Tue, 20 Nov 2012 17:45:39 -0800, the renowned
wrote:

On Tue, 20 Nov 2012 19:06:01 -0500, Spehro Pefhany
wrote:

On Tue, 20 Nov 2012 18:44:22 -0500, the renowned Tom Gardner
Mars@Tacks wrote:

On 11/20/2012 11:39 AM, Spehro Pefhany wrote:
Anything better than PTFE/Teflon for high temperatures?

Just go dry or what? High temperature compressor output line... the
hose is bellows with braid over it.



BIG PROBLEM ON THE HORIZON!!! I did exactly what you are talking about
and the temp from the output of the compressor was too high for the
braid covered hose! The hose under the SS braid disintegrated. DON'T
DO IT!

Hi, Tom, thanks for the warning.

This stuff is 300-series stainless on the inside too- no rubber. It's
crinkled like a bellows so it's flexible and braided with stainless
braid on the outside. It's not particularly cheap, but not insane.


Best regards,
Spehro Pefhany
Greetings Spehro,
If you want high temp sealant then try this link:
http://www.flexbar.com/shop/pc/ROCKSETT-2-OZ-p4019.htm
The stuff is 10 bucks a bottle, is sold by Brownells too, and is good
enough that your stainless hose will be glowing red when the max temp
of this stuff is reached.
Eric

Thanks, Eric!


Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com

[DoN. Nichols[_2_]]

On 2012-11-21, Spehro Pefhany wrote:
On Tue, 20 Nov 2012 18:44:22 -0500, the renowned Tom Gardner
Mars@Tacks wrote:

On 11/20/2012 11:39 AM, Spehro Pefhany wrote:
Anything better than PTFE/Teflon for high temperatures?

Just go dry or what? High temperature compressor output line... the
hose is bellows with braid over it.



BIG PROBLEM ON THE HORIZON!!! I did exactly what you are talking about
and the temp from the output of the compressor was too high for the
braid covered hose! The hose under the SS braid disintegrated. DON'T
DO IT!

Hi, Tom, thanks for the warning.

This stuff is 300-series stainless on the inside too- no rubber. It's
crinkled like a bellows so it's flexible and braided with stainless
braid on the outside. It's not particularly cheap, but not insane.

I've used similar stuff at work to transport liquid helium. But
it had two bellows -- one inside the other, and the space between them
was evacuated to maximize insulation. Think of it as a long, flexible
Dewar. :-)

But I have one short run of the what you are describing, which I
intend to use to decouple vibration on a compressor from the pipes in
the shop.

Enjoy,
DoN.

--
Remove oil spill source from e-mail
Email: | Voice (all times): (703) 938-4564
(too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html
--- Black Holes are where God is dividing by zero ---

[Martin Eastburn]

I"m concerned that this is why head 'gaskets' are blowing out with this
Alcohol gasoline we have now. New cars likely have something that handles
dual fuels but not older cars and trucks.

Martin

On 11/20/2012 4:26 PM, Stormin Mormon wrote:
I've used Permatex IIb non hardening, for auto gasket applications. Should
work on threads. Messy, but alcohol cleans it off skin. Not much cleans it
off clothing.

Christopher A. Young
Learn more about Jesus
www.lds.org
.

"whit3rd" wrote in message
...

Auto stores stock a variety of (usually Permatex brand) sealants
in RTV silicone, including a variety of removable sealants.
If you ever replace/repair threaded fittings, the nonremovable
ones are not recommended.

[Martin Eastburn]

They also sell sealant for Wood stoves - it is high temp RTV and is red.
I've used it on my wood stove - and it stands up to red hot temps.

Martin


On 11/20/2012 8:30 PM, Spehro Pefhany wrote:
On Tue, 20 Nov 2012 17:45:39 -0800, the renowned
wrote:

On Tue, 20 Nov 2012 19:06:01 -0500, Spehro Pefhany
wrote:

On Tue, 20 Nov 2012 18:44:22 -0500, the renowned Tom Gardner
Mars@Tacks wrote:

On 11/20/2012 11:39 AM, Spehro Pefhany wrote:
Anything better than PTFE/Teflon for high temperatures?

Just go dry or what? High temperature compressor output line... the
hose is bellows with braid over it.



BIG PROBLEM ON THE HORIZON!!! I did exactly what you are talking about
and the temp from the output of the compressor was too high for the
braid covered hose! The hose under the SS braid disintegrated. DON'T
DO IT!

Hi, Tom, thanks for the warning.

This stuff is 300-series stainless on the inside too- no rubber. It's
crinkled like a bellows so it's flexible and braided with stainless
braid on the outside. It's not particularly cheap, but not insane.


Best regards,
Spehro Pefhany
Greetings Spehro,
If you want high temp sealant then try this link:
http://www.flexbar.com/shop/pc/ROCKSETT-2-OZ-p4019.htm
The stuff is 10 bucks a bottle, is sold by Brownells too, and is good
enough that your stainless hose will be glowing red when the max temp
of this stuff is reached.
Eric

Thanks, Eric!


Best regards,
Spehro Pefhany

[Tom Gardner[_6_]]

On 11/20/2012 7:06 PM, Spehro Pefhany wrote:
On Tue, 20 Nov 2012 18:44:22 -0500, the renowned Tom Gardner
Mars@Tacks wrote:

On 11/20/2012 11:39 AM, Spehro Pefhany wrote:
Anything better than PTFE/Teflon for high temperatures?

Just go dry or what? High temperature compressor output line... the
hose is bellows with braid over it.



BIG PROBLEM ON THE HORIZON!!! I did exactly what you are talking about
and the temp from the output of the compressor was too high for the
braid covered hose! The hose under the SS braid disintegrated. DON'T
DO IT!

Hi, Tom, thanks for the warning.

This stuff is 300-series stainless on the inside too- no rubber. It's
crinkled like a bellows so it's flexible and braided with stainless
braid on the outside. It's not particularly cheap, but not insane.


Best regards,
Spehro Pefhany


Well, that's OK then! I would use Teflon, but I used a rubber hose.
You might use a smear of hi-temp grease. As a lubricant, you will get
the joint tighter.

[anorton]

wrote in message
...
On Tue, 20 Nov 2012 19:06:01 -0500, Spehro Pefhany
wrote:

On Tue, 20 Nov 2012 18:44:22 -0500, the renowned Tom Gardner
Mars@Tacks wrote:

On 11/20/2012 11:39 AM, Spehro Pefhany wrote:
Anything better than PTFE/Teflon for high temperatures?

Just go dry or what? High temperature compressor output line... the
hose is bellows with braid over it.



BIG PROBLEM ON THE HORIZON!!! I did exactly what you are talking about
and the temp from the output of the compressor was too high for the
braid covered hose! The hose under the SS braid disintegrated. DON'T
DO IT!

Hi, Tom, thanks for the warning.

This stuff is 300-series stainless on the inside too- no rubber. It's
crinkled like a bellows so it's flexible and braided with stainless
braid on the outside. It's not particularly cheap, but not insane.


Best regards,
Spehro Pefhany
Greetings Spehro,
If you want high temp sealant then try this link:
http://www.flexbar.com/shop/pc/ROCKSETT-2-OZ-p4019.htm
The stuff is 10 bucks a bottle, is sold by Brownells too, and is good
enough that your stainless hose will be glowing red when the max temp
of this stuff is reached.
Eric

Thanks, that is very handy to know about. I used to use a ceramic-based
adhesive that required mixing and baking.

[[email protected]]

On Tue, 20 Nov 2012 21:30:01 -0500, Spehro Pefhany
wrote:

On Tue, 20 Nov 2012 17:45:39 -0800, the renowned
wrote:

On Tue, 20 Nov 2012 19:06:01 -0500, Spehro Pefhany
wrote:

On Tue, 20 Nov 2012 18:44:22 -0500, the renowned Tom Gardner
Mars@Tacks wrote:

On 11/20/2012 11:39 AM, Spehro Pefhany wrote:
Anything better than PTFE/Teflon for high temperatures?

Just go dry or what? High temperature compressor output line... the
hose is bellows with braid over it.



BIG PROBLEM ON THE HORIZON!!! I did exactly what you are talking about
and the temp from the output of the compressor was too high for the
braid covered hose! The hose under the SS braid disintegrated. DON'T
DO IT!

Hi, Tom, thanks for the warning.

This stuff is 300-series stainless on the inside too- no rubber. It's
crinkled like a bellows so it's flexible and braided with stainless
braid on the outside. It's not particularly cheap, but not insane.


Best regards,
Spehro Pefhany
Greetings Spehro,
If you want high temp sealant then try this link:
http://www.flexbar.com/shop/pc/ROCKSETT-2-OZ-p4019.htm
The stuff is 10 bucks a bottle, is sold by Brownells too, and is good
enough that your stainless hose will be glowing red when the max temp
of this stuff is reached.
Eric

Thanks, Eric!


Best regards,
Spehro Pefhany
Your welcome. Let us know how well it worksplease.
Eric

[Spehro Pefhany]

On 21 Nov 2012 03:03:52 GMT, "DoN. Nichols"
wrote:


I've used similar stuff at work to transport liquid helium. But
it had two bellows -- one inside the other, and the space between them
was evacuated to maximize insulation. Think of it as a long, flexible
Dewar. :-)

Had a closer look at one of those this morning (feeding a plane liquid
He through a blowhole). They work very nicely- no frost on the
outside.

[technomaNge[_4_]]

On 11/21/2012 12:32 PM, Spehro Pefhany wrote:

Had a closer look at one of those this morning (feeding a plane liquid
He through a blowhole). They work very nicely- no frost on the
outside.


I gotta ask: What is the liquid helium used for? What does it do?
Was this a regular passenger plane or some military/experimental?



technomaNge
--
I'm familiar with LOX.

[DoN. Nichols[_2_]]

On 2012-11-22, technomaNge wrote:
On 11/21/2012 12:32 PM, Spehro Pefhany wrote:

Had a closer look at one of those this morning (feeding a plane liquid
He through a blowhole). They work very nicely- no frost on the
outside.


I gotta ask: What is the liquid helium used for? What does it do?
Was this a regular passenger plane or some military/experimental?

I think that he meant "plain", not "plane".

Liquid Helium is used to achieve very low temperatures -- much
lower than the 77 degrees K of liquid Nitrogen. When I was using it, it
was as refrigerant liquid in producing even lower temperatures. (We
were experimenting with superconductivity at the time.

Enjoy,
DoN.

--
Remove oil spill source from e-mail
Email: | Voice (all times): (703) 938-4564
(too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html
--- Black Holes are where God is dividing by zero ---

[Spehro Pefhany]

On Wed, 21 Nov 2012 20:43:47 -0600, the renowned technomaNge
wrote:

On 11/21/2012 12:32 PM, Spehro Pefhany wrote:

Had a closer look at one of those this morning (feeding a plane liquid
He through a blowhole). They work very nicely- no frost on the
outside.


I gotta ask: What is the liquid helium used for? What does it do?
Was this a regular passenger plane or some military/experimental?

It's in a somewhat modified cargo aircraft- a new kind of commercial
surveying system. The helium just keeps the innards very cold.


Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com

[Kristian Ukkonen]

On 11/20/2012 18:39, Spehro Pefhany wrote:
Anything better than PTFE/Teflon for high temperatures?

Just go dry or what? High temperature compressor output line... the
hose is bellows with braid over it.

One possibility is to use a graphite based thread sealant, like:
http://www.novussealing.com/download...sheets/gts.pdf

The threads have to be reasonably good for that to work.