I don't know if you can get a definitive answer or a decent answer beyond the following: use a flow rate that they system can support, the higher of the two numbers is better provided it does not overwhelm the system and is not actively forcing gas into your lungs, as this will cause lung trauma.
Take your mask, put it up to your face without straps, and turn the gas on. The bag should not overinflate, the valves should be working but not strained, it should remain affixed to your face with mild pressure from your hand without either forcing air down your throat or trying shoot off your face (a sign the valves are not able to remove adequate gas flow). Since you are doing this, you might want to take a few deep breaths (being careful to position the mask so that it falls away from your face if (when) you pass out).
I've said previously, I would use a bag or a regulator, but it is your call.
Take your mask, put it up to your face without straps, and turn the gas on. The bag should not overinflate, the valves should be working but not strained, it should remain affixed to your face with mild pressure from your hand without either forcing air down your throat or trying shoot off your face (a sign the valves are not able to remove adequate gas flow). Since you are doing this, you might want to take a few deep breaths (being careful to position the mask so that it falls away from your face if (when) you pass out).
I've said previously, I would use a bag or a regulator, but it is your call.
