Matronics Email Lists :: View topic - fuel-safe "grease" for Viton o-rings

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

fuel-safe "grease" for Viton o-rings

Matronics Email Lists Forum Index -> Zenith-List

View previous topic :: View next topic

Author Message

craig(at)craigandjean.com
Guest

Posted: Sat Apr 03, 2010 2:49 pm Post subject: fuel-safe "grease" for Viton o-rings

I'm mounting fitting  adapters on my Andair gascolator and they seal to the body with Viton o-rings.  I'd like to replenish the film of grease on the o-rings and am wondering what  kind of grease to use. Searching on the web indicates that silicon grease can be  used on Viton o-rings but it is not clear if the grease is fuel-proof. I'll send  a query to Andair on Monday but I was wondering if anyone had any advice. If  there is a recommended product a source would be useful too.

  

 --  Craig

   [quote][b]

Z601c(at)anemicaardvark.c
Guest

Posted: Sat Apr 03, 2010 3:32 pm Post subject: fuel-safe "grease" for Viton o-rings

I'm not certain about gas slowly removing it, but I can tell you that the only 

thing I was ever intentionally able to remove silicon grease with was MEK. 



On Saturday 03 April 2010 17:48:46 you wrote:

 	  Quote: 	
		   I'm mounting fitting adapters on my Andair gascolator and they seal to the

 body with Viton o-rings. I'd like to replenish the film of grease on the

 o-rings and am wondering what kind of grease to use. Searching on the web

 indicates that silicon grease can be used on Viton o-rings but it is not

 clear if the grease is fuel-proof. I'll send a query to Andair on Monday

  but I was wondering if anyone had any advice. If there is a recommended

  product a source would be useful too.

 

 -- Craig

 


	


-- 

========================================

                                       Jim B. Belcher

                                       BS,MS Physics

                                            A&P/IA

                      General Radio Telephone Certificate

                               Instrument Rated Pilot

                     Retired Aerospace Technical Manager

                         Semi-proficient Househusband

========================================

craig(at)craigandjean.com
Guest

Posted: Sat Apr 03, 2010 4:02 pm Post subject: fuel-safe "grease" for Viton o-rings

Thanks. Do you think I could get my engine to run on MEK? 



-- Craig 



--

Z601c(at)anemicaardvark.c
Guest

Posted: Sat Apr 03, 2010 4:14 pm Post subject: fuel-safe "grease" for Viton o-rings

On Saturday 03 April 2010 19:01:29 you wrote:

 	  Quote: 	
		   

 

 Thanks. Do you think I could get my engine to run on MEK? 

 I doubt it. But we may have to if the feds keep fooling around. 
	


-- 

========================================

                                       Jim B. Belcher

                                       BS,MS Physics

                                            A&P/IA

                      General Radio Telephone Certificate

                               Instrument Rated Pilot

                     Retired Aerospace Technical Manager

                         Semi-proficient Househusband

========================================

Terry Phillips

Joined: 11 Jan 2006
Posts: 346
Location: Corvallis, MT

Posted: Sat Apr 03, 2010 9:20 pm Post subject: fuel-safe "grease" for Viton o-rings

Craig



 My memories from years in the lab and industry is that Viton is the el primo elastomer. It is a fluropolymer, like a rubbery teflon, and it is impervious to most solvents. I cannot imagine that silicone grease would cause any problem. My home water filter has common neoprene or whatever O-rings and they recommend silicone grease for them. However for my fuel system fittings, I'm planning on use EZ-Turn which is supposed to be fuel resistant. EZ-Turn might be a good choice for your O-rings.



 Terry



 

 At 03:48 PM 4/3/2010 -0700, you wrote:

  	  Quote: 	
		  I'm mounting fitting adapters on my Andair gascolator and they seal to the body with Viton o-rings. I'd like to replenish the film of grease on the o-rings and am wondering what kind of grease to use. Searching on the web indicates that silicon grease can be used on Viton o-rings but it is not clear if the grease is fuel-proof. I'll send a query to Andair on Monday but I was wondering if anyone had any advice. If there is a recommended product a source would be useful too.

  

 -- Craig 	
 

 

 Terry Phillips 

 ttp44~at~rkymtn.net

 Corvallis MT

 ZU-601XL/Jab 3300 s .. l .. o .. o .. w build kit - Tail & flaps are done; 

 Upgrading my wings & flaps per the AMD Safety Directive

 http://www.mykitlog.com/N47TP/     [quote][b]

_________________
Terry Phillips
Corvallis, MT
ttp44<at>rkymtn.net
Zenith 601XL/Jab 3300 slow build kit - Tail feathers done; working on the wings.

craig(at)craigandjean.com
Guest

Posted: Sat Apr 03, 2010 9:38 pm Post subject: fuel-safe "grease" for Viton o-rings

I'm using EZ-Turn on my metal-to-metal pipe thread  fittings. But I think part of the purpose of the existing grease on the o-rings  is just that: to grease the parts to allow them to slide together without  pinching the o-ring. EZ-Turns is great stuff but is very sticky and doesn't  strike me as a very good grease. Anyway I'll give Andair a chance to reply next  week.

  

 -- Craig



   From: owner-zenith-list-server(at)matronics.com  [mailto:owner-zenith-list-server(at)matronics.com] On Behalf Of Terry  Phillips

Sent: Saturday, April 03, 2010 10:18 PM

To:  zenith-list(at)matronics.com

Subject: Re: fuel-safe "grease"  for Viton o-rings

 

Craig



My memories from years in the lab and industry is that  Viton is the el primo elastomer. It is a fluropolymer, like a rubbery teflon,  and it is impervious to most solvents. I cannot imagine that silicone grease  would cause any problem. My home water filter has common neoprene or whatever  O-rings and they recommend silicone grease for them. However for my fuel system  fittings, I'm planning on use EZ-Turn which is supposed to be fuel resistant.  EZ-Turn might be a good choice for your O-rings.



Terry

At  03:48 PM 4/3/2010 -0700, you wrote:

  	  Quote: 	
		  I'm    mounting fitting adapters on my Andair gascolator and they seal to the body    with Viton o-rings. I'd like to replenish the film of grease on the o-rings    and am wondering what kind of grease to use. Searching on the web indicates    that silicon grease can be used on Viton o-rings but it is not clear if the    grease is fuel-proof. I'll send a query to Andair on Monday but I was    wondering if anyone had any advice. If there is a recommended product a source    would be useful too.

 

--    Craig 	
 



Terry Phillips 

ttp44~at~rkymtn.net

Corvallis  MT

ZU-601XL/Jab 3300 s .. l .. o .. o .. w build kit - Tail & flaps are  done; 

Upgrading my wings & flaps per the AMD Safety Directive

http://www.mykitlog.com/N47TP/ [quote]



href="http://www.matronics.com/Navigator?Zenith-List">http://www.matronhref="http://forums.matronics.com">http://forums.matronics.com

href="http://www.matronics.com/contribution">http://www.matronics.com/c

[b]

flyadive(at)gmail.com
Guest

Posted: Sun Apr 04, 2010 5:30 am Post subject: fuel-safe "grease" for Viton o-rings

Craig:



Viton & Buna -N are very similar to each other with Viton have a

ability to hold up against radiation.

 I don't think your plane runs off of nuclear enegery yet 



There are two lubes that can be used VERY successfully and EVERYONE

that has a fuel selector should

have one in their took box - Parker Lube <--- VERY EXPENSIVE and I

stay away from ANYTHING

Parker - Hanifin makes, produces, sells or distributes.  The other is

EZ-Turn which is FANTASTIC stuff

and very reasionable ($12) a 5 oz tube will last you for years.

When you touch it you will swear this stuff is like rubber cement.

But once applied you will love the feel

and action of the turning qualities.



PLEASE refrain from using it as a sex jell.  



Barry

On Sat, Apr 3, 2010 at 6:48 PM, Craig Payne <craig(at)craigandjean.com> wrote:

 	  Quote: 	
		   I'm mounting fitting adapters on my Andair gascolator and they seal to the

 body with Viton o-rings. I'd like to replenish the film of grease on the

 o-rings and am wondering what kind of grease to use. Searching on the web

 indicates that silicon grease can be used on Viton o-rings but it is not

 clear if the grease is fuel-proof. I'll send a query to Andair on Monday but

 I was wondering if anyone had any advice. If there is a recommended product

 a source would be useful too.



 -- Craig

goodings(at)yorku.ca
Guest

Posted: Mon Apr 05, 2010 6:57 am Post subject: Fuel-safe "grease" for Viton O-rings

Craig and Barry:



"Viton & Buna-N are very similar to each other . . ."  This is NOT true, 

in my opinion.  Viton is much more inert (and much more expensive).  Also, 

I think that silicone grease is fuel-resistant.  But, TRY IT.  Stick some 

silicone grease on a stick or whatever, and swish it around a lot in 

gasoline (with or without ethanol additive).  I don't think it dissolves 

very much at all.



John Goodings, C-FGPJ, CH601HD with R912S, Carp/Ottawa/Toronto.

flyadive(at)gmail.com
Guest

Posted: Mon Apr 05, 2010 1:46 pm Post subject: Fuel-safe "grease" for Viton O-rings

John:



The term INERT does not fit into the description of these O rings.

Inert is a one word description of something that is non-reactive with

oxygen.  As for expensive YES it is, but purchasing an O ring is not

the issue (Come On... $0.50 Vs $0.20), since the O Ring is supplied

with the unit.

And, your "opinion"...  Nor mine matter, when it come to physics and

chemistry.  It is the function of the material for this operation and

others that takes precedence.  Also consult a chemical reactivity

chart for Viton, Buna-N and Neoprene the differences will become

apparent.  Yet when compared against GAS and especially MoGas Neoprene

takes the hit.



I do not know what is in EZ Turn but it is both fuel resistant and

slippery and ... Even though it does not matter to many home builders,

it is even FAA acceptable.  GEE!  I wonder what the manufacture

recommends?  Since the manufacture requirements must meet or exceed

FAA requirements AND the manufacture sets the preference.  This part

of aircraft building is really an oxymoron.  The manufacture sets the

requirements yet the FAA controls the requirements, or something to

that effect.  Sort of the fox watching the hen house?



Barry



On Mon, Apr 5, 2010 at 10:56 AM, John Goodings <goodings(at)yorku.ca> wrote:

 	  Quote: 	
		   



 Craig and Barry:



 "Viton & Buna-N are very similar to each other . . ."  This is NOT true, in

 my opinion.  Viton is much more inert (and much more expensive).  Also, I

 think that silicone grease is fuel-resistant.  But, TRY IT.  Stick some

 silicone grease on a stick or whatever, and swish it around a lot in

 gasoline (with or without ethanol additive).  I don't think it dissolves

 very much at all.



 John Goodings, C-FGPJ, CH601HD with R912S, Carp/Ottawa/Toronto.

craig(at)craigandjean.com
Guest

Posted: Mon Apr 05, 2010 2:15 pm Post subject: Fuel-safe "grease" for Viton O-rings

I haven't heard back from Andair yet. But on a small piece of paper that

came with the fittings they say "use any light grease. Looking at the design

the grease is there to ease assembly (so the o-ring isn't pinched or

damaged). But ultimately the o-ring seals the joint.



BTW: these are the adapters I am talking about. Although the pictures below

don't show it the backside of these adapters have a raised shoulder and an

o-ring which seals into a circular depression on the main body:



http://www.andair.co.uk/pix/accessories/MF25.jpg

 

http://www.andair.co.uk/pix/accessories/FF25.jpg

 

 -- Craig

goodings(at)yorku.ca
Guest

Posted: Tue Apr 06, 2010 5:59 am Post subject: Fuel-safe "grease" for Viton O-rings

Barry and Craig:



"The term INERT does not fit into the description of these O rings. Inert 

is a one word description of something that is non-reactive with oxygen. . 

. ."  Not true.  INERT, to a chemist, simply means unreactive to a wide 

variety of substances, not simply oxygen.  This is true of Viton; in my 

experience, it is unreactive to a wide variety of substances, certainly in 

a laboratory context.  Personally, I should have no hesitation in using a 

Viton O-ring smeared with a silicone grease in the presence of fuel, both 

Avgas and Mogas (with or without ethanol additive).  I think this is what 

the original question was about.



John Goodings, C-FGPJ, CH601HD with R912S, Carp/Ottawa/Toronto,

Professor Emeritus of Chemistry.

moorecomp

Joined: 14 Aug 2006
Posts: 32

Posted: Thu Apr 08, 2010 7:58 am Post subject: Re: fuel-safe

The EZ Turn is to lubricate the valve itself.  The use of simple petrolatum (petroleum jelly) is commonly approved by almost all engine manufacturers for o-ring lubrication in oil and fuel systems.



C. Moore

A&P

Mancelona, MI

Display posts from previous:

	Matronics Email Lists Forum Index -> Zenith-List	All times are GMT - 8 Hours
Page 1 of 1

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum