Marketing InformationThe Taco Geo-Sentry zone valve enhances the overall performance of any geothermal system. The unique patented technology in the Geo-Sentry utilizes a microcircuit-based logic to control a gear driven electronic actuator which drives a ball valve-based body design. All this adds up to a geothermal zone valve that leads the industry in energy efficiency, flow capacity (Cv), shut-off pressure rating, ease of installation, diagnostic capability and the number of valves that can be use on a standard 40 VA transformer.