What is the differential air to water ratio of a low differential valve?

The differential air to water ratio of a low differential valve is typically understood to be 6:1. This ratio reflects the standard design and functionality of such valves, which are used in various fire protection systems to maintain appropriate flow conditions. A 6:1 ratio indicates that for every unit of water, there should be six units of air, ensuring that the valve operates efficiently under low differential pressure conditions.

Understanding this ratio is crucial for fire protection professionals, as it influences system performance and effectiveness. A valve with a 6:1 air to water ratio optimally balances the requirements for air to disperse liquids in different fire suppression systems, which can include sprinklers or foam applications, thereby enhancing reliability and safety during operation.