I'm testing in world as I go because I can't be arsed to build it all twice(thrice etc etc), took me over 10 goes to get my Ammonia HP Turbine running and it's still not 100%. However I've already made a decision that if it goes bang in future because I knocked a pipe off or something equally stupid I'd play on. Also gives me a nice challenge to try and protect my base from the blast as much as possible.
Reika, back to the closed loop Ammonia problem. I turned on particles and noticed that some are hitting the generator, I'm presuming this is where the Ammonia loss is occurring and you may want to look at that.