Delete Operator

[Heerockss]

Ok, maybe im too overloaded with all those new cool features, maybe im too tired playing around with TyFlow all night or maybe im just dumb. How the hell does the Delete Operator work? Either it deletes nothing or everything. 
How do i set it up so my particles will be deleted after they are, lets say, 40 frames old? 
The docs are not that helpful in this case.

Should be pretty straight forward...Time test op and then wire tht to new event with delet op?

That is one solution, but what about all the settings inside the Timing Rollout of the Delete Operator itself? I would like to know how to handle it inside the Operator.