What you'll probably end up doing is either getting new ends swaged onto your hoses, or use a female pipe coupling between the hose and a 1/2 NPT male to 1/2 male ORB adapter. If the hoses aren't too long, it may be worth your while to get new ones made, otherwise you're going to have an awkward looking conglomeration of fittings.
The ORB fittings aren't tapered threads, so the NPT fitting will probably leak if you mount it directly to the valve.
Another option is to get an "adjustable" 90* elbow with female pipe threads on one end, and male ORB on the other. The ORB end has a bulkhead fitting type nut and washer behind the o-ring so you can set the angle where you want it, then screw your hose end into the female pipe end. I used these except with a JIC end in place of the pipe thread.
Sean