question

If you have that many cases I would recommend using a different method. Here are some options:

Use a Table

You could create a table with one row per type and the port to be used by that type. Then you would just look up the value from the table like this:

Table("Ports")[item.Type][1]

Write some if statements

Open the code editor and use if statements to return the right port value.

if (item.Type <= 10)
	return 1;
else if(item.Type > 10 && item.Type <= 20)
	return 2;
else
	return 3;

Use a mathematical function

It's possible the port number can be derived from the item's Type using a mathematical function. For example, if Type 1-10 use port 1, Type 11-20 use 2, and Type 21-30 use 3 you could write this function:

Math.ceil(item.Type / 10)

Here's an example model with 3 routing queues using a different one of the above suggestions.

portsbytable.fsm