The FLO-BOSS 1810 Series fixed orifice manual balancing valves are dezincification-resistant and feature integral pressure temperature ports and memory stop. Direct system readings are taken across the orifice, with no special calculators or meters required. The FLO-BOSS 1810 Series provides 1440-degree of throttling adjustment, resulting in precise setting of system flow, and is also capable of providing system isolation for maintenance with an integral memory stop feature allowing the system to be returned to its retained settings once maintenance is completed. The NIBCO FLO-BOSS manual balancing valves provide the ultimate solution for a wide range of mechanical and HVAC chilled and hot water application requirements to ensure a balanced system and comfortable indoor climate. NIBCO FLO-BOSS valves and components are also backed by the NIBCO 5-year 125 Percent limited warranty.