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Old 04-12-2019, 06:28 PM   #1
kpark
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Tygon Fuel tubing


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Getting Tygon Fuel tubing on items like your fuel tank and air-trap

Was having a hell of time with yellow tygon fuel tubing over the barb's on fuel tank and air-trap the tubing was fairly stiff due to its thickness. Ding Bright idea - I submerged the tubing in a mug of boiling water from a tea pot and after a minute grab them with some needle-nose pliers was able to easily slip the tubing over the barbs - The heat softened the tubing for the job and stiffened up again when cooled.
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Old 04-13-2019, 04:13 AM   #2
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Re: Tygon Fuel tubing

I use a similar idea, heat gun works well.
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Old 04-13-2019, 10:16 AM   #3
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Re: Tygon Fuel tubing

Heat also helps when using the other clear pressure fuel line from the pump to the turbine. Forgot the name of it. Though most use Festo fittings.
Like the hot water idea better as it provides uniform heat.
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Old 04-14-2019, 12:02 PM   #4
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Re: Tygon Fuel tubing

I stick the end of the tubing in my mouth and chew. I then use my stainless steel wire to secure tubing and fitting.
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Old 04-14-2019, 01:41 PM   #5
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Re: Tygon Fuel tubing

Uhhhh… a couple of comments...

As I was taught by several turbine manufacturers ( RAM, JetCat, PST ) years ago...

- Tygon: great chemical resistance but do not exceed temperatures of 165F as it will lead to a breakdown to chemical resistance and flexibility. Leaching becomes more of a possibility with age after being exposed to high heat. I was told NOT to apply any heat to the yellow, common type of "tygon " we use. Rather place the end of the tube over an oversized blunt object as needle nosed pliers...let the tube " relax " for 15 - 30 minutes then put it on.

Polyethylene tubing that is commonly used as 3 - 6 mm tubing should NEVER be heated as permanent distortion and wall thinning can occur very quickly. The best way as stated previously is gently work the end of the tube by yes.....gently chewing it. The softening effects allows for easier application.
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Old 04-14-2019, 02:39 PM   #6
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Re: Tygon Fuel tubing

Quote:
Originally Posted by hitechflyer View Post
I use a similar idea, heat gun works well.
I should have noted that I gently heat the tubing with the heat gun, and never had a problem.
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Old 04-14-2019, 03:06 PM   #7
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Re: Tygon Fuel tubing

No worries. it has worked for you but its not considered good practice.
Here is a little story...years ago JetCat USA and RAM were buying bulk polyethylene tubing. Quite unexpectantly, customers of both companies started reporting problems of air in lines and subsequent flameouts. Engines were blamed as were ecus and pumps. After considerable testing and the findings of some hard core modelers it was determined that the polyethylene line that was purchased by the manufacturers had been sitting around for some time. The weight of the coiled tubing was causing the tubing below to become distorted. Although the tubing ends appeared to be well seated in the festo connectors the seal was not perfect, allowing for some microbubbles to form. The congregation of the bubbles would result in a larger bolus, eventually being released in a filter, pump or line causing a flame out.
Anyway moral of the story is that fuel lines need to be considered when failures occur just as much as pumps, ecus and batteries. I cant count the number of times when I was a field rep for RAM, JetCat and PST when I came across kinked lines, old stiff tygon, improperly cut ends, poorly seated festo connectors
improperly sized lines etc.
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Old 04-14-2019, 06:49 PM   #8
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Re: Tygon Fuel tubing

Why are you guys still using Tygon and not Urethane Tubing?
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Old 04-14-2019, 08:06 PM   #9
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Re: Tygon Fuel tubing

Thanks , Dean ; for all the clarification . When I said hot water ,I was meaning hot to the feel , not boiling hot . Thanks.
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