Siemens 245-00234 ZONE VALVE, 3-WAY, 1/2", 4.0 CV, NPT W/ 24VAC 0-10VDC NSR ACTUATORSiemens 245 00234 Zone valve, 3 way, 1 2", 4. 0 Cv, NPT w 24Vac 0 10Vdc NSR actuatorZone valve and actuator assembly. 3 way valve body; NPT connection; Line size 0. 50 inch; Flow rate 4. 0 Cv; SSA61U 0 10Vdc, non spring return actuator, 24Vac, AB A closed in zero position. Zone valve and actuator assembly. 3 way valve body; NPT connection; Line size 0. 50 inch; Flow rate 4. 0 Cv; SSA61U 0 10Vdc, non spring return actuator, 24Vac, AB A normally closed.