In valuation type in PM Order header tab, you can select the batch from which you are going issue & to which batch you going to receive.
As you don't have split valuation, how its possible to have Zero value for DEFECTIVE type??
Price will be common for all batches viz., NEW, REFURBISH & DEFECTIVE. You can't differentiate the price.
Only with split valuation, you can differentiate the price between these 3.