Siemens MXG461.15-3.0U MAGNETIC, 1/2" VALVE, 2-WAY OR FLOATING, 3.5 CV, 0-10V CONTROL, W/ NPT UNIONSSiemens MXG461. 15 3. 0U Magnetic, 1 2" Valve, 2 way or floating, 3. 5 Cv, 0 10V control, w NPT unions This MX Control Valve with Electronic Modules is designed for 0 to 10V control of chilled water and low pressure hot water, especially in HVAC systems. This 1 2" valve can be configured for straight through or floating applications and has a 3. 5 Cv and 72 psi close off. It has 1000: 1 resolution and a positioning time is 1 second, manual override,