Thanks for all your replies. Looks like there are many ways to achieve this.
I've done it like this
The first inserter pulls out items and is only activated when less then 200 items are available in the network.
The second inserter pulls out items from the requester chest (requesting 100 items)
The ...

That's it. I have to read out the whole logistic
why i don't thought of this by myself
thank you

Hi all,
how can i do this to use stored items first for further production instead of producing new ones.
For example:
for Fast belts you need standard belts to.
I alway keep 200 of them in stock (passive provider, limited to 2 stacks)
but when i replace the standard belts with fast belts, the ...