Can you connect directly DZR brass ball valve with black steel pipe for chilled water without using dielectric coupling. The valve is internal threaded connection?

Connecting a DZR ( dezincification resistant) brass ball valve directly to black steel pipe without a dielectric coupling is not recommended for chilled water applications. The dissimilar metals can lead to galvanic corrosion, potentially compromising the integrity of the connection over time. To ensure longevity and prevent corrosion, it's best to use a dielectric coupling or another form of isolation between the brass valve and the steel pipe.