Siemens Zone Valve,Globe, 1-2 in. NPT 257-02039

Zone Valve, Actuator Control Pressure - Maximum 8 psi, Actuator Control Pressure - Minimum 3 psi, Actuator Return Action Spring Return, Actuator Type Pneumatic, Actuator Voltage Not Applicable, Application Convectors, Body Material Brass, Body Pattern Two-Way, Bypass Port Coefficient of Volume (Cv) Not Applicable, Close-Off Pressure 45 psi, Coefficient of Volume (Cv) 2.5, Fluid Temperature - Maximum 250 Degrees F, Fluid Temperature - Minimum 35 Degrees F, Gasket/Plug Material Not Applicable