Found some pics, I installed a drain pipe with a drip tee, allows any sediment to drop into it and also allows a small amount of condense to stay there , so when I turn my compressor off I blow out any debris or condense straight out the valve
If u look at my combined dryer / oiler ur see the small rubber tube on the bottom of the dryer glass container
Know u don’t need an oiler but was just to show u the drain tube I installed
Assume ur also want a pressure relief valve , if u wants links for the stainless steel fittings Plse let me know
As having only one connection I assume also ur out that at the bottom or side in order u can drain condense and then tee off to the compressor
How are u going to control the pressure , ie installing a pressure limit switch ??, do u know the pressure rating of ur tank
Hope it helps in a small way
