Fireplace wont stay lite

It is possible that your 630 Eurosit 0630545 needs a deep cleaning or a replacement part. The loud poof sound could be caused by a buildup of dirt and debris in the burner or a faulty part. You should contact a qualified technician to inspect the unit and determine the cause of the issue.

Question edited for clarity.

This says yes.

https://www.google.com/search?q=eurosit+630+gas+valve+replacement

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It is a mechanical valve, not electronic. If you have a fireplace with an electronic remote, you need a remote for the fireplace not the valve.

https://www.google.com/search?q=SIT+630+Eurosit+propane+gas+valve

make model replacement remote control

is the search query.
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not advised safety issue but if you do you have to replace the orfices to natural gas and regulator

Its the power unit ,On some you can change just this . If not then its a new valve .

Possible defective gas valve.

The tank size dosn't matter all you need is a feed line This looks like a spicific tank appalaction but just feed it remotely with a normal propane tank and a feed line and save your self the head ache as long as it dose what you want it to do ist cool

I'm in the middle of this right now. Y'all don't know what you're talking about. The thermocouple you can buy at the local hardware store has a different thread (fine) from the Eurosit TC (coarse) and doesn't fit. Now I'm trying to source a Eurosit TC. Any suggestions?

eBay has them for $75