This Johnson Controls valve controls fluid flow in HVAC systems. It has a port size of 3/4 inches and operates as a two-way valve. The valve features a flow coefficient (Cv) of 7.4, which measures its capacity to pass fluid. It uses a 24V power supply for operation and functions in two positions: open or closed. The spring return mechanism ensures the valve returns to its default position when power is lost, and it is normally open (N/O).