X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 23 May 2012 13:17:26 -0400 Message-ID: X-Original-Return-Path: Received: from bthceg-momta02-cwmx.mycingular.net ([166.216.231.208] verified) by logan.com (CommuniGate Pro SMTP 5.4.5) with ESMTP id 5555763 for lml@lancaironline.net; Wed, 23 May 2012 11:49:59 -0400 Received-SPF: neutral receiver=logan.com; client-ip=166.216.231.208; envelope-from=nrgarvin@comcast.net X-Original-Return-Path: Received: from [198.228.226.189] ([198.228.226.189:57040] helo=[10.58.4.122]) by bthceg-momta02 (envelope-from ) (ecelerity 3.0.23.37692 r(37717)) with ESMTP id 90/95-07498-BE60DBF4; Wed, 23 May 2012 08:49:25 -0700 Subject: Re: [LML] Re: Recoseal References: From: neal garvin Content-Type: multipart/alternative; boundary=Apple-Mail-18-851165427 X-Mailer: iPhone Mail (8C148) In-Reply-To: X-Original-Message-Id: <517BB3B0-AA78-4711-BF8D-45663ABE77E5@comcast.net> X-Original-Date: Wed, 23 May 2012 11:48:36 -0400 X-Original-To: Lancair Mailing List Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (iPhone Mail 8C148) --Apple-Mail-18-851165427 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 Pipe thread sealant does more than lubricate the threads. It seals the spira= l leak path that exists between the root of the thread and the crown of the m= ating thread. Without this sealant, excessive overtorque is required to try t= o create a metal-to-metal seal which damages the threads and overstresses th= e fittings (specifically the female fitting) which can then crack. . On May 23, 2012, at 11:17 AM, "Bruce" wrote: > OK, let=E2=80=99s talk about =E2=80=9Cthread sealants=E2=80=9D. Usually pi= pe thread to pipe thread joints are lubricated by Teflon paste or tape. You=E2= =80=99ll notice I said lubricate not seal. The purpose of the =E2=80=9Cseala= nt=E2=80=9D is to lubricate the joint and prevent galling, not to seal. NPT t= hreads are tapered not straight. The taper is what provides the seal. > =20 > Bruce > WWW.Glasair.org >=20 > -----Original Message----- > From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of rwo= lf99@aol.com > Sent: Wednesday, May 23, 2012 8:17 AM > To: lml@lancaironline.net > Subject: [LML] Recoseal > =20 > I recall the reference to Recoseal as well, but I could not find it in the= manual this afternoon. > =20 > For Bruce's benefit, this was a thread sealant called out for the NPT pipe= threads on the AN fittings going into the hydraulic cylinders. There was n= o suggestion that it be used on the flared fitting connection. Your suggest= ion is correct -- if you can't get the flared fitting to seal, remake the fl= are. > =20 > I used Loctite 565 pipe thread sealant for screwing the fittings into the N= PT holes in the cylinders. Rated to 10,000 psi and can handle gasoline and h= ydraulic fluid. Available in a lot of places, although I don't recall wheth= er I bought it at Home Depot or the local auto parts store. > =20 > - Rob Wolf --Apple-Mail-18-851165427 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8

Pipe thread sealant does more than lubr= icate the threads. It seals the spiral leak path that exists between the roo= t of the thread and the crown of the mating thread. Without this sealant, ex= cessive overtorque is required to try to create a metal-to-metal seal which d= amages the threads and overstresses the fittings (specifically the female fi= tting) which can then crack.

.

On May 23= , 2012, at 11:17 AM, "Bruce" <BGray@= glasair.org> wrote:

OK, let=E2=80=99s talk about =E2=80=9Ct= hread sealants=E2=80=9D. Usually pipe thread to pipe thread joints are lubricated b= y Teflon paste or tape. You=E2=80=99ll notice I said lubricate not seal. The purpose o= f the =E2=80=9Csealant=E2=80=9D is to lubricate the joint and prevent galling,= not to seal. NPT threads are tapered not straight. The taper is what provides the seal.

Bruce
WWW.Glasair.org

-----Original Mes= sage-----
From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf= Of rwolf99@aol.com
Sent: Wednesday, May 23, 2012= 8:17 AM
To: lml@lancaironline.net
= Subject: [LML] Recoseal

I recall the reference to Recoseal as well, but I could not find it in the man= ual this afternoon.

For Bruce's benefit, this was a thread sealant called out for the NPT pipe threa= ds on the AN fittings going into the hydraulic cylinders. There was no suggestion that it be used on the flared fitting connection. Your suggestion is correct -- if you can't get the flared fitting to seal, remake= the flare.

I used Loctite 565 pipe thread sealant for screwing the fittings into the NPT holes= in the cylinders. Rated to 10,000 psi and can handle gasoline and hydraul= ic fluid. Available in a lot of places, although I don't recall whether I= bought it at Home Depot or the local auto parts store.

- Rob Wolf

= --Apple-Mail-18-851165427--