View Full Version : Liquid Penetrant Inspectant
11-06-2007, 08:57 PM
Or a fancy name for heat exchanger dye. Want to get some feedback/ opinions from fellow techs. Weve been using this for 2 years now and have increased our furnace kill rate dramatically. It makes it so much easier than just visual inspection or the candle method. Opinions?
11-06-2007, 09:08 PM
What is the name of this product?(link) and how do you inspect the heat-x when there is a evap on top of the furnace?
11-06-2007, 09:41 PM
Yup. Thats the stuff. What you do is drill holes in the faceplate of the heat exchanger between the cells. Then you shoot the dye with the provided rods through the holes to coat the outside of the heat exhanger. Then you use the black light with the glasses and inspect it from the inside. Youll know if theres a crack. The dye will glow bright yellow. McDonnell Douglas (Boeing) has used this technique for 50 years to check the airplanes and fuel tanks for blemishes. Anyother questions I can answer Id be glad to. The only downfall is the price. You can almost make the kit for a fraction of the price. The rods and the dye are hard to fond though.
11-06-2007, 09:55 PM
I met Steve, the inventor of this system, in Philly at a home inspection seminar where he demonstrated it. It does seem simplistic and easy to duplicate although he told me he had difficulty drumming up the fluid (dye) mixture. It does work..'
11-07-2007, 01:03 AM
Works awesome. We have been using it for several years.
Powered by vBulletin® Version 4.2.0 Copyright © 2013 vBulletin Solutions, Inc. All rights reserved.