Unless your pressure comming out of the valve is less than 50psi, you will need a pressure regulator (35psi to 45psi) and drip irrigation demands an ultra fine filter.
Here's an example of an entire kit that's available, but the individual parts are also available. You likely will not find this type of equipment at a big box store. You'll likely have to get the parts at either online such as this forums sponser or locally if you have an irrigation supplier like Ewing.