What is preaction valve?

A preaction valve is a type of valve used in fire protection systems, specifically in preaction sprinkler systems. It requires two triggers to release water: the detection of smoke or heat (from a fire detection system) and the activation of a sprinkler head. This design helps prevent accidental water discharge, making it suitable for areas containing sensitive equipment or valuable assets. The preaction valve enhances safety by ensuring that water is only released when a fire is confirmed.