A321 doors

[Rwy in Sight]

I was looking at the safety card, yesterday, and I saw that doors 1L and 2L have a similar opening but on 2L there is a small cover on the handle that opens the door. The slide arming system is a bit different as well. I remember reading somewhere doors 1 and 4 on A321 are Type 1 and doors 2 and 3 are Type 2.
The FA on door 2R said there are quite a few differences between doors 1 and 2 and also doors 2 and 3 are Type C.

So what are the difference between the two type of doors on the A321 (I understand raft, size and use for normal or emergency are the main ones - but if there are others please enlighten me) and also could some one explain how the door system classification works what is Type 1 Type 2 and Type 3.


I hope it is clear and it makes sense.


Thanks in advance.