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Rich Langer
Joined: 10 Apr 2007
Posts: 26
Location: Florida
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 Posted: Mon Oct 12, 2009 12:45 pm Post subject: ultrasonic leak detectors |
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Does anyone on the list use an ultrasonic leak detector for finding vacuum leaks and, if so, do you recommend a certain brand or model? I have a small leak I can not find . Thanks
Rich
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dougsappllc(at)gmail.com
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| Posted: Mon Oct 12, 2009 1:41 pm Post subject: ultrasonic leak detectors |
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Rich,I use Amprobe, but what ever type you get make sure it comes with a head set. bought mine on Ebay for about $150.00.
Food for thought:
Recently my old enough to vote refer in the house died. It was discovered to have a tiny leak in the condenser coil. A weeks delivery time and $600.00 later we again had cold beer and all was good. During the $85.00 per hour house call to diagnose it's problem I watched the tech (at 85.00 per you can call yourself a tech!) pressurize the system then take a "squealer" type sniffer and sniff out the problem, when it got within a foot of the leak it started to make a soft churp, as we got closer it began to screech. Just for fun I went to the shop and got my Ultrasonic unit. I could not detect the leak. Rather I could have detected it (at) 45 atms pressure I don't know, but I was pretty impressed. I described our trials and tribulations with the Yaks and CJs and he indicated that it would work very well to find even the smallest leaks which would not be audible even with the ultrasonic detector. I am in the process of building up a filler attachment to use to add the refrigerant gas to the pneumatic system.
Doug
On Mon, Oct 12, 2009 at 1:45 PM, Rich Langer <rlanger2(at)comcast.net (rlanger2(at)comcast.net)> wrote: | Quote: | --> Yak-List message posted by: "Rich Langer" <rlanger2(at)comcast.net (rlanger2(at)comcast.net)>
Does anyone on the list use an ultrasonic leak detector for finding vacuum leaks and, if so, do you recommend a certain brand or model? I have a small leak I can not find . Thanks
Rich
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=267625#267625
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Douglas Sapp
Doug Sapp LLC
18B Riverview Road
Omak WA 98841
PH 509-826-4610
Fax 509-826-3644
[quote][b]
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jonboede(at)hotmail.com
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| Posted: Mon Oct 12, 2009 1:52 pm Post subject: ultrasonic leak detectors |
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I looked into this.
My observation was that the freon that you can get from the auto parts store goes liquid at hardly any pressure. I was trying to find a flavor of freon that could be run up to higher working pressures but the government makes it necessary to have a license to handle just about any of it.
Jon
Date: Mon C 12 Oct 2009 14:40:10 -0700
Subject: Re: ultrasonic leak detectors
From: dougsappllc(at)gmail.com
To: yak-list(at)matronics.com
Rich CI use Amprobe C but what ever type you get make sure it comes with a head set. bought mine on Ebay for about $150.00.
Food for thought:
Recently my old enough to vote refer in the house died. It was discovered to have a tiny leak in the condenser coil. A weeks delivery time and $600.00 later we again had cold beer and all was good. During the $85.00 per hour house call to diagnose it's problem I watched the tech (at 85.00 per you can call yourself a tech!) pressurize the system then take a "squealer" type sniffer and sniff out the problem C when it got within a foot of the leak it started to make a soft churp C as we got closer it began to screech. Just for fun I went to the shop and got my Ultrasonic unit. I could not detect the leak. Rather I could have detected it (at) 45 atms pressure I don't know C but I was pretty impressed. I described our trials and tribulations with the Yaks and CJs and he indicated that it would work very well to find even the smallest leaks which would not be audible even with the ultrasonic detector. I am in the process of building up a filler attachment to use to add the refrigerant gas to the pneumatic system.
Doug
On Mon C Oct 12 C 2009 at 1:45 PM C Rich Langer <rlanger2(at)comcast.net (rlanger2(at)comcast.net)> wrote: | Quote: | --> Yak-List message posted by: "Rich Langer" <rlanger2(at)comcast.net (rlanger2(at)comcast.net)>
Does anyone on the list use an ultrasonic leak detector for finding vacuum leaks and C if so C do you recommend a certain brand or model? I have a small leak I can not find . Thanks
Rich
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=267625#267625
===========
rget="_blank">http://www.matronics.com/Navigator?Yak-List
===========
http://forums.matronics.com
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le C List Admin.
="_blank">http://www.matronics.com/contribution
===========
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--
Douglas Sapp
Doug Sapp LLC
18B Riverview Road
Omak WA 98841
PH 509-826-4610
Fax 509-826-3644
[quote]
tp://www.matronics.com/Navigator?Yak-List
onics.com
ww.matronics.com/contribution
[b]
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dougsappllc(at)gmail.com
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| Posted: Mon Oct 12, 2009 2:08 pm Post subject: ultrasonic leak detectors |
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Hmmmm always something.
Doug
On Mon, Oct 12, 2009 at 2:52 PM, Jon Boede <jonboede(at)hotmail.com (jonboede(at)hotmail.com)> wrote:
| Quote: | I looked into this.
My observation was that the freon that you can get from the auto parts store goes liquid at hardly any pressure. I was trying to find a flavor of freon that could be run up to higher working pressures but the government makes it necessary to have a license to handle just about any of it.
Jon
Date: Mon, 12 Oct 2009 14:40:10 -0700
Subject: Re: Yak-List: ultrasonic leak detectors
From: dougsappllc(at)gmail.com (dougsappllc(at)gmail.com)
To: yak-list(at)matronics.com (yak-list(at)matronics.com)
Rich,I use Amprobe, but what ever type you get make sure it comes with a head set. bought mine on Ebay for about $150.00.
Food for thought:
Recently my old enough to vote refer in the house died. It was discovered to have a tiny leak in the condenser coil. A weeks delivery time and $600.00 later we again had cold beer and all was good. During the $85.00 per hour house call to diagnose it's problem I watched the tech (at 85.00 per you can call yourself a tech!) pressurize the system then take a "squealer" type sniffer and sniff out the problem, when it got within a foot of the leak it started to make a soft churp, as we got closer it began to screech. Just for fun I went to the shop and got my Ultrasonic unit. I could not detect the leak. Rather I could have detected it (at) 45 atms pressure I don't know, but I was pretty impressed. I described our trials and tribulations with the Yaks and CJs and he indicated that it would work very well to find even the smallest leaks which would not be audible even with the ultrasonic detector. I am in the process of building up a filler attachment to use to add the refrigerant gas to the pneumatic system.
Doug
On Mon, Oct 12, 2009 at 1:45 PM, Rich Langer <rlanger2(at)comcast.net (rlanger2(at)comcast.net)> wrote:
--
Douglas Sapp
Doug Sapp LLC
18B Riverview Road
Omak WA 98841
PH 509-826-4610
Fax 509-826-3644
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--
Douglas Sapp
Doug Sapp LLC
18B Riverview Road
Omak WA 98841
PH 509-826-4610
Fax 509-826-3644
[quote][b]
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viperdoc(at)mindspring.co
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| Posted: Mon Oct 12, 2009 6:41 pm Post subject: ultrasonic leak detectors |
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Check with Dennis Savarese. He uses one on occasion.
Doc Kemp
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mark.bitterlich(at)navy.m
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| Posted: Tue Oct 13, 2009 12:25 pm Post subject: ultrasonic leak detectors |
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I have used this type of tester extensively. That said, I'll throw this
out for what it is worth. These types of leak detectors were designed
for leaks where air is going OUT and not leaks where air is going IN. I
know this will probably open up a real can of worms, but my experience
has been that the sound is actually made by a high pressure source going
to a low(er) pressure and the noise itself is on the downside of that
event. Meaning that the ultrasonics made by air going IN to a vacuum
will be better heard INSIDE where the vacuum actually IS. Hard to
listen for there!
On the other hand, pressure leaking OUT has the sound OUTSIDE where the
ultrasonic mike USUALLY is easy to use.
I am not saying that the Ultrasonic leak detector will not pick up these
sounds. Only that they will be much weaker than normal and very hard to
hear.
If the vacuum leak is happening with a gasoline motor, a much easier
method is to use some sort of pressurized flammable gas in a can....
Such as starting fluid. I am not recommending starting fluid... I am
merely saying some people use it. Others use WD-40! No ... really! All
manner of different gases are used. ANYWAY.. You spray them around
where the engine is running where there might be a vacuum leak and
listen closely to what the engine then sounds like. It works.
Good luck.
Mark Bitterlich
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Rich Langer
Joined: 10 Apr 2007
Posts: 26
Location: Florida
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| Posted: Wed Oct 14, 2009 4:08 am Post subject: Re: ultrasonic leak detectors |
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Mark:
Sorry, I should have said air leaks, where the air is leaking out of a B nut, not vacuum leaks. From your reply these ultrasonic detectors should work for finding air in the pressurized lines leaking out because of corrosion or a fitting coming loose.
After I shut down and close the main air valve, air leaks out and within 5-6 hours all of the pressure in the lines is gone.
Rich
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tigeryak18t
Joined: 26 Sep 2009
Posts: 233
Location: PARIS FRANCE
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| Posted: Wed Oct 14, 2009 4:40 am Post subject: ultrasonic leak detectors |
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Rich
Where can we find these ultrasonic detectors.
I may have a leak in my emergency system.
Thx
Didier
Didier Blouzard
06 24 24 36 72
Le 14 oct. 2009 Ã 14:08, "Rich Langer" <rlanger2(at)comcast.net> a
écrit :
| Quote: |
Mark:
Sorry, I should have said air leaks, where the air is leaking out of
a B nut, not vacuum leaks. From your reply these ultrasonic
detectors should work for finding air in the pressurized lines
leaking out because of corrosion or a fitting coming loose.
After I shut down and close the main air valve, air leaks out and
within 5-6 hours all of the pressure in the lines is gone.
Rich
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p 67891#267891
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_________________
Didier Tiger YAK18T
Member of Commemorative Air Force
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dsavarese0812(at)bellsout
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| Posted: Wed Oct 14, 2009 4:56 am Post subject: ultrasonic leak detectors |
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Rich,
What you may have is a cracked flare on the tubing inside the B nut or a crack in the tubing inside the sleeve just under the flare. Not uncommon. You may want to remove that section of tubing and fabricate a new line. Since the Chinese flares are all M12, you can fabricate a new line as follows.
Remove the old line and cut the tube to remove the B nuts. Set them aside as they will be reused.
Using 1/4" 5052 aluminum tubing, cut a length of tubing equivalent to the old tubing just removed. Allow enough length for any bends in the tubing.
Place one metric M12 B nut and an AN819-4 sleeve (you may have to ream out the hole in the nut to allow the nut to fit over the sleeve) on one end of the new tubing and flare it. Repeat this procedure for the other end.
Pre-bend the tubing as best you can to fit it to the airplane. Some bending may have to be done with one end attached (not torqued tight) on the airplane.
Install the new line in the a/c. Be careful not to over-torque the B nuts as you may crack the new flare on the tubing.
Dennis
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dsavarese0812(at)bellsout
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| Posted: Wed Oct 14, 2009 5:44 am Post subject: ultrasonic leak detectors |
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Try soapy water in a spray bottle first. I have an ultrasonic leak detector and have found it does not always find the small leaks. I've even replaced it and still have the same issues. I've had just as much luck with soapy water in a spray bottle.
If your emergency system is leaking, the first place to look is at the rubber O-ring under the 22 mm nut on the air bottle. A very common problem particularly if the tank was recently removed from the airplane and the fittings removed from the tank for inspection or servicing. The next place to look is the emergency air valve. Remove the output line from the emergency air valve with the valve completely closed. Spray soapy water on the output fitting on the valve. If it bubbles, the valve is leaking internally.
The next place to check is the line going to the instrument.
Dennis
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dsavarese0812(at)bellsout
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| Posted: Wed Oct 14, 2009 5:57 am Post subject: ultrasonic leak detectors |
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One other thing that does occur is the main air valves will leak internally because of internal corrosion. If you remove the output fitting from the air valve and spray soapy water on the open fitting on the valve, (not the B-nut) see if it bubbles. If it does, remove the valve and send it to Doug for overhaul. He's the man when it comes to repairing this stuff.
Dennis
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mark.bitterlich(at)navy.m
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valleyauto(at)clearwire.n
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| Posted: Wed Oct 14, 2009 7:46 am Post subject: ultrasonic leak detectors |
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This is what I use to find a air leak in my system and it works great. I put some CRC brakleen brake parts cleaner non-flammable part #05089 in the charge hose then charge the system and I use a Snap On refrigerant leak detector Part #ACT750A go over the system and you will find your leak. Hope this works for you.
Don
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