leaking NPTF quick connects

[myyaz33]

Bought the following adapters and quick disconnects (6 total) and am having a **** of a time keeping them from leaking. I started off without any sort of sealant or lubricant and didn't over tighten but they leaked. Then I tried tightening more with less leakage. Tried both PTFE paste and Teflon (against advice, I know). Nothing seems to work. I am now wondering if the threads are toast. Any ideas or tips. Not really interested in a war of tape or no tape.

http://www.discounthydraulichose.com/product_p/5501.htm
http://www.discounthydraulichose.com/ISO_7241_Series_A_Quick_Disconnect_Coupler_p/601-xx.htm

 

[whistlepig]

We use this for industrial applications. I use it at home. Nothing close to it.Loctite ｮ 567? - Henkel

 

[Chilly807]

It's possible they sent you ORB female ends on the quick connects instead of NPTF. If so they'll keep leaking. I think they're the same thread-per-inch count.

Mine don't leak a drop, and they're sealed with you-know-what.


Sean

 

[myyaz33]

We use this for industrial applications. I use it at home. Nothing close to it.Loctite ｮ 567? - Henkel

Does this stuff need to cure?

It's possible they sent you ORB female ends on the quick connects instead of NPTF. If so they'll keep leaking. I think they're the same thread-per-inch count.

Mine don't leak a drop, and they're sealed with you-know-what.


Sean

Possibly, but I wouldn't know the difference.

I am thinking about just doping them up good and cranking the **** out of them and if it don't work, buying some more adapters and quick connects and starting again. If I could, I would rather not use the NPTF couplers, but that is all I can find.

 

[kennyd]

I am thinking about just doping them up good and cranking the **** out of them and if it don't work, buying some more adapters and quick connects and starting again. If I could, I would rather not use the NPTF couplers, but that is all I can find.

That is exactly what I would do. If you use PTFE past, then also give it some cure time...

 

[oldnslo]

It's possible they sent you ORB female ends on the quick connects instead of NPTF. If so they'll keep leaking. I think they're the same thread-per-inch count.

Sean

The unfortunate reality is that:
1/2" NPT and #10 SAE ORB are the exact same thread per inch & the Out side dimensions are similar enough they will some what interchange.

3/4" NPT and #12 SAE ORB have the same condition.

You can some times tell the difference on female ends since the SAE ORB port will have chamfer or lead in angle of 12 - 15 degrees. Pipe threads some times have an angle but it is usually closer to 30 degrees.

Yes Loctite has a cure time and prefers clean dry threads for assembly. Oil on the threads tends to reduce its effectiveness.

Roy

 

[J_J]

You probably have deformed the threads too much, and about the only fix is to replace both the fittings, and start over with new fittings, and a sealer.

 

[Discount Hydraulic Hose]

We do not stock the 600 Series Couplers (ISO 7241-1 Series A) with SAE/ORB thread, so it's very unlikely that you have the wrong thread. You can eliminate that possibility right there.

I'm sorry to say that JJ may be right. You may have worn out the threads by now. Replacing the couplers, the elbows or both may be your only option at this point. Without seeing the fittings myself, I can't really guess why you are having this problem.

Give us a call if we can be of further assistance.

 

[myyaz33]

You probably have deformed the threads too much, and about the only fix is to replace both the fittings, and start over with new fittings, and a sealer.

I think you are probably right.

We do not stock the 600 Series Couplers (ISO 7241-1 Series A) with SAE/ORB thread, so it's very unlikely that you have the wrong thread. You can eliminate that possibility right there.

I'm sorry to say that JJ may be right. You may have worn out the threads by now. Replacing the couplers, the elbows or both may be your only option at this point. Without seeing the fittings myself, I can't really guess why you are having this problem.

Give us a call if we can be of further assistance.

Agreed on them being warn out. Any thoughts on how many turns those 2 fittings together should have or how many threads should be showing when properly tightened?

 

[Kitz]

If its orb the 45 should screw in preety much all the way in easily. If they are right for each other they will screw in just a few threads. Teflon pipe dope is all you need. No cure time needed. Make it tight. No leaks