How do you stop a flare fitting from leaking?
How do you stop a flare fitting from leaking?
A leak will occur where the cone enters the flare. Loosen and tighten the flare nut several times to the torque specifications. This action will positively seat the cone into the flare. If the joint still leaks, dissemble the connection and wipe off the flare and the cone with a rag.
WHAT ARE AN hose fittings?
AN fittings are a flare fitting, using 37° flared tubing to form a metal-to-metal seal. They are similar to other 37° flared fittings, such as JIC, which is their industrial variant.
Why do fittings leak?
Occasionally, any AN plumbing system may develop a leak – this is usually caused by extended use, excessive wear or even over-torqueing the fittings or hose ends.
Can you use Teflon tape on flare fittings?
Do not use Teflon ® tape or pipe sealant on any flare ends because you will not obtain a leak-free seal. Keep flare end of fitting free of grease, oil and thread sealant. Use a wrench only on the hex surfaces of the fittings.
Can you over tighten flare fittings?
Fourth, don’t over-tighten the flare fitting, as this can cause leaks. Daikin offers preset flare torque wrenches that will allow you to properly tighten the flare fitting without over-tightening them. Always use a backup wrench when tightening any flare fitting.
Do you put sealant on an fittings?
You don’t use any sealant on a an fitting. If it is leaking then the face of either the female or male flare is defective and needs replaced.
Do an fittings require sealant?
Tape or sealer is used on the pipe thread end of an adapter where it is threaded into an engine block, pump, head, cooler, etc. Never use anything on the tapered end where the flare hose end is connected. It is not needed.
What is the difference between JIC and AN fittings?
JIC fittings are dimensionally identical to AN (Army-Navy) fittings, but are produced to less exacting tolerances and are generally less costly. SAE 45-degree flare fittings are similar in appearance, but are not interchangeable, though dash sizes 2, 3, 4, 5, 8, 10, 14, and 16 share the same thread size.
How tight do AN fittings need to be?
They should be hand tightened and then another 1 or 2 turns, but no more. More turns will put to much pressure on the fitting and may crack it and cause a leak. The Tensile Stress created by tightening the fitting beyond hand tight and 1 or 2 more turns will crack the female fittings.
What is the flare on Anan fittings?
AN fittings use a 37 degree flare as the sealing surface. DO NOT use AN fittings with different flare-type fittings. This will cause leaks and damage to the fittings. Each AN size refers to the outer diameter (o.d.) of the tube, or inner diameter (i.d.) of the hose that it’s used with. The numbers assigned equal the size in 1/16 inch increments.
Why does my 37 degree seat leak?
Maybe….come on blue! “Many people overtighten the aluminum fitting on the adapter, which distorts the 37 degree seat, and may cause a leak. Both the threads and the seat surface should have a drop or two of oil to smooth the tightening process.
What is an AN fittings?
AN stands for Army-Navy. The size specifications were established by the military back in World War II. They were originally used in the aerospace industry. AN fittings use a 37 degree flare as the sealing surface.
