Marketing InformationGrundfos up zone valves incorporate 24 VAC normally closed motorized actuator design with or without sealed end switch. All components are corrosion-resistant. The high-gear ratio transmission eliminates gear tooth stress, water hammer issues and valve "bouncing" during closing. Forged brass body is two way flow with high-Cv rating and incorporates a durable stainless steel/EPDM valve stem assembly.