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graeme bird
Joined: 15 Jul 2010
Posts: 434
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 Posted: Sat Jul 14, 2012 12:04 pm Post subject: NPT fittings on fuel flow sensor |
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I have just been fitting flow and return EI FP5 fuel sensors using brass NPT hose fittings but they leak, should I use PFTE tape (which is not recommended in case threads of PTFE affect the sensor or block the flow, or maybe compound)
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_________________
Graeme Bird
kit4 (Wagstaff) TBD
Kit3 G-CLXU (Gregory) mono 914 xs Woodcomp
Kit2 G-PATS - (kesterton) Mono Classic 912 warpdrive
Kit 1 G-UMPY - Mono Classic/XS 912S, Woodcomp G(@)gdbmk.co.uk |
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rampil
Joined: 04 May 2007
Posts: 870
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| Posted: Sat Jul 14, 2012 12:31 pm Post subject: Re: NPT fittings on fuel flow sensor |
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Never use teflon plumbing tape on fuel fitting!
Tape shreds, sheds and blocks carb orifaces
PTFE compound is the way to go if need be.
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Ira N224XS |
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europa-list(at)matronics.
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| Posted: Sat Jul 14, 2012 2:12 pm Post subject: NPT fittings on fuel flow sensor |
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Best use a special fuel resistant grease, forget name of it. Small amount on threads cured mine. Dave G-ldvo
Sent from my iPhone
On 14 Jul 2012, at 21:09, "graeme bird" <graeme(at)gdbmk.co.uk> wrote:
| Quote: |
I have just been fitting flow and return EI FP5 fuel sensors using brass NPT hose fittings but they leak, should I use PFTE tape (which is not recommended in case threads of PTFE affect the sensor or block the flow, or maybe compound)
--------
Graeme Bird
G-UMPY
Mono Classic/XS FWFD 912ULS/Warp drive FP
Newby: 35 hours
g(at)gdbmk.co.uk
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=378291#378291
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rlborger(at)mac.com
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| Posted: Sat Jul 14, 2012 5:08 pm Post subject: NPT fittings on fuel flow sensor |
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Greame,
No PTFE tape. There are several brands of PTFE pipe seal compound (SAF-T-LOK, Permatex, Swagelok, LocTite, etc.) that would do the job. They will seal the joint and prevent seizing.
Blue skies & tailwinds,
Bob Borger
Europa XS Tri, Rotax 914, Airmaster C/S Prop.
Little Toot Sport Biplane, Lycoming Thunderbolt AEIO-320 EXP
3705 Lynchburg Dr.
Corinth, TX 76208-5331
Cel: 817-992-1117
rlborger(at)mac.com
On Jul 14, 2012, at 3:04 PM, graeme bird wrote:
I have just been fitting flow and return EI FP5 fuel sensors using brass NPT hose fittings but they leak, should I use PFTE tape (which is not recommended in case threads of PTFE affect the sensor or block the flow, or maybe compound)
--------
Graeme Bird
G-UMPY
Mono Classic/XS FWFD 912ULS/Warp drive FP
Newby: 35 hours
g(at)gdbmk.co.uk
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mau11(at)free.fr
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| Posted: Sat Jul 14, 2012 10:23 pm Post subject: NPT fittings on fuel flow sensor |
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Another solution is Loctite 577. (fuel resistant)
Michel AUVRAY
From: Robert Borger (rlborger(at)mac.com)
Date: 2012-07-15 03:07
To: europa-list (europa-list(at)matronics.com)
Subject: Re: NPT fittings on fuel flow sensor
--> Europa-List message posted by: Robert Borger <rlborger(at)mac.com>
Greame,
No PTFE tape. There are several brands of PTFE pipe seal compound (SAF-T-LOK, Permatex, Swagelok, LocTite, etc.) that would do the job. They will seal the joint and prevent seizing.
Blue skies & tailwinds,
Bob Borger
Europa XS Tri, Rotax 914, Airmaster C/S Prop.
Little Toot Sport Biplane, Lycoming Thunderbolt AEIO-320 EXP
3705 Lynchburg Dr.
Corinth, TX 76208-5331
Cel: 817-992-1117
rlborger(at)mac.com
On Jul 14, 2012, at 3:04 PM, graeme bird wrote:
--> Europa-List message posted by: "graeme bird" <graeme(at)gdbmk.co.uk>
I have just been fitting flow and return EI FP5 fuel sensors using brass NPT hose fittings but they leak, should I use PFTE tape (which is not recommended in case threads of PTFE affect the sensor or block the flow, or maybe compound)
--------
Graeme Bird
G-UMPY
Mono Classic/XS FWFD 912ULS/Warp drive FP
Newby: 35 hours
g(at)gdbmk.co.uk
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p; - List Contribution Web Site -
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ion
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[quote][b]
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grahamsingleton(at)btinte
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| Posted: Sun Jul 15, 2012 12:09 am Post subject: NPT fittings on fuel flow sensor |
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Use Loctite Teflon pipe seal, (sparingly) it's supposed to go to dust when unscrewed. Never use the tape.
Graham
From: david park <europa-list(at)matronics.com>
To: "europa-list(at)matronics.com" <europa-list(at)matronics.com>
Sent: Saturday, 14 July 2012, 23:11
Subject: Re: NPT fittings on fuel flow sensor
--> Europa-List message posted by: david park <europa-list(at)matronics.com (europa-list(at)matronics.com)>
Best use a special fuel resistant grease, forget name of it. Small amount on threads cured mine. Dave G-ldvo
Sent from my iPhone
On 14 Jul 2012, at 21:09, "graeme bird" <graeme(at)gdbmk.co.uk (graeme(at)gdbmk.co.uk)> wrote:
| Quote: | --> Europa-List message posted by: "graeme bird" <graeme(at)gdbmk.co.uk (graeme(at)gdbmk.co.uk)>
I have just been fitting flow and return EI FP5 fuel sensors using brass NPT hose fittings but they leak, should I use PFTE tape (which is not recommended in case threads of PTFE affect the sensor or block the flow, or maybe compound)
--------
Graeme Bird
G-UMPY
Mono Classic/XS FWFD 912ULS/Warp drive FP
Newby: 35 hours
g(at)gdbmk.co.uk
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=378291#378291
http://forums.matronics  tronics.com/contribution" target="_blank">http://www.matronics.com/contri================
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