DIN Valve Thread repair?

[Teller]

Valves dont have the same treads as pipes. They are softer metal. Get a new valve.

 

[Wookie]

I will echo the comment that the problem may be something other than cross-threading - specifically a malformation of the valve aperture. I recently had a similar problem, and used a stainless steel DIN Sealing Plug as a tap - it is harder than the brass. I worked it into the opening and gradually threaded it all the way in. The challenge is to do it gradually, so the the valve metal does not rupture. In essence, you are reshaping the valve metal. So, get a plug and a really big crescent wrench and have at it, slowly.

For those who recommended a new valve - in principle, and as a general rule, I agree with you. It is the easiest, and least expensive solution. But, there may be reasons why it is not a viable alternative. As one example, if the tank is an older 3500 PSI HP steel tank, and you need a left hand modular valve with 7/8" UNF threading, you might have better luck finding a tap to fit it than a new valve.

I have such a valve if you need one.....

Valves dont have the same treads as pipes. They are softer metal. Get a new valve.

Unless, of course, you are threading brass pipe. I thread a lot of brass pipe.

 

[Leadking]

Just an informational note; What is needed is a die, not a tap.

 

[znolan]

In this case, I would hesitate to "fix" anything that has the ability to use "high pressure" and "life support" in the same sentence.

 

[Wookie]

Just an informational note; What is needed is a die, not a tap.

I believe that the OP wanted to repair the threads on the valve, not the regulator, necessitating the use of a tap, not a die. In either case, a new valve is cheaper than either solution.

 

[ajduplessis]

I believe that the OP wanted to repair the threads on the valve, not the regulator, necessitating the use of a tap, not a die. In either case, a new valve is cheaper than either solution.

And a lot safer!!!!

 

[Scared Silly]

In this case, I would hesitate to "fix" anything that has the ability to use "high pressure" and "life support" in the same sentence.

No hesitation is needed for this case as they are not in the same sentence. It is more from a practical and economical point of view.