Caleffi Z121000, 24 Volt AC Normally Closed ActuatorCondition:* New Surplus Stock, No OEM Packaging. As Pictured. Additional Notes:* Fail-Safe: Spring Return* Supply Voltage: 24 Volt AC* Control Signal: 2 Position* Flow Pattern: 2-Way or 3-Way* Valve Trim: Brass* Maximum Closeoff Pressure: Cv = 1.0 75 psid (517 kPa) Cv = 2.5 50 psid (345 kPa) Cv = 3.5 30 psid (207 kPa) Cv = 5.0 25 psid (172 kPa) Cv = 7.5 20 psid (137 kPa)* Maximum Pressure: 300 psig (2067 kPa)* Materials Of Construction: Forged brass body, stainless steel stem, brass seat, EPDM paddle, aluminum actuator base plate, polycarbonate actuator housing* Media Compatibility: Hot and chilled water, up to 50% glycol; 15 psig (103 kPa) maximum steam (2-way valves only)* Media Temperature Range: 32 to 240 (0 to 115)Caleffi Z121000