With such a setup, you can do it with one copper coupler. Solder one thread adatpor, and then thread the valve on. Adaptor and nipple to other side of valve. Finish with a copper coupler.
Years ago, I saw a movie file. Johny Carson, and I can't remember the oher guy. "Just the facts, ma'am" and they did in inteview. Turns out that Claude Cooper from Cleveland had copped the copper clappers the cleaning lady had found missing from the closet. I thought it was funny. Thanks for a memory.