Help with DIN300 fitting differences

The one with less threads may be a 232bar and the other with more threads a 300bar.

Probably an o-ring or the face isn't seated squared or enough thats why it's leaking through the holes.

I have one with the nipple and if you look at the nipple and the oring around it and then look inside the din housing you see that the two holes are past the end of the threads. If it is leaking through the holes you don't have the din screwed in quite far enough to cover the holes or the oring might not be sealing the two pieces together. Try screwing the din just a little bit farther in the housing and see if that doesn't fix the leak. Get it snug, but not too tight. I know they say you only have to hand tighten it but you may have to put a little torque on it to get a complete seal. Don't "manhandle it" just get it very snug ... if the oring is right it should seal.

Shalom

John

The one with less threads may be a 232bar and the other with more threads a 300bar.

Probably an o-ring or the face isn't seated squared or enough thats why it's leaking through the holes.

Click to expand...

Yo is sort of right. One is a DIN 300 and the other is a DIN 200. The only difference is the length of the thread so it is possible to use a DIN 300 on a Din 200 bottle valve but not the other way around. There is a similar arrangement on CGA 346-347 SCBA valves.

Be careful, the working pressure for a DIN 200 is 200 Bar, 2,900 psi. The DIN 300 is for high pressure tanks up to about 4,500 psi, or 300 Bar.

That is the reason why the 200 will not fit the 300, it is not rated for that high pressure. The 200 are usually for scuba tanks up to 3,000 psi.

The one with less threads may be a 232bar and the other with more threads a 300bar.

Probably an o-ring or the face isn't seated squared or enough thats why it's leaking through the holes.

Click to expand...

Yo is sort of right. One is a DIN 300 and the other is a DIN 200. The only difference is the length of the thread so it is possible to use a DIN 300 on a Din 200 bottle valve but not the other way around. There is a similar arrangement on CGA 346-347 SCBA valves.

Click to expand...

Eaglebeak is sort of right since it looks like he somehow managed to actually go the other way around.

The one with less threads may be a 232bar and the other with more threads a 300bar.

Probably an o-ring or the face isn't seated squared or enough thats why it's leaking through the holes.

Click to expand...

Yo is sort of right. One is a DIN 300 and the other is a DIN 200. The only difference is the length of the thread so it is possible to use a DIN 300 on a Din 200 bottle valve but not the other way around. There is a similar arrangement on CGA 346-347 SCBA valves.

Click to expand...

Eaglebeak is sort of right since it looks like he somehow managed to actually go the other way around.

Click to expand...

No Yo, I'm sort of wrong because they both happen to be DIN 300 fittings and I couldn't distinguish that by looking at the photo. I made a judgement from the information that the op supplied just like you.

https://youtu.be/BbgCj2t6yQs

I just watched a video and they showed two that looked just like that, and he explained it as one has a “ restricter” in it and the other one doesn’t ( one that is flush don’t. I don’t know much about these, but watch the omega tank video.

Both fittings in the cworkman74's photo are DIN 300. A DIN 232 is shorter and has fewer threads and won't seal on a DIN 300 valve. The DIN300 with a nipple is the Omega and here is a pic of the restrictor installed. It is merely a set screw with an allen head that allows the air flow to be managed easily when in place.