Siemens Building Technology MXG461.20-5.0U Modulating Magnetic Control Valve NPT Cv - 3/4 5.9

The Siemens MXG461.20-5.0U is a 3/4" NPT modulating magnetic control valve designed for precise 0 to 10V control of chilled water and low-pressure hot water in HVAC systems. This three-way valve features a factory-calibrated magnetic actuator with integrated electronics module for position control and positioning feedback, making it ideal for closed-circuit water systems.

Key Features:

• 3/4" NPT threaded connection with included union fittings and blanking flange
• 5.9 Cv flow coefficient with 43 psi close-off pressure
• Fast positioning time of less than 1 second with exceptional 1000:1 resolution
• Configurable for straight-through or mixing valve applications
• Switch-selectable control signals: 0 to 10 Vdc, 2 to 10 Vdc, or 4 to 20 mA
• User-selectable flow characteristics: linear or equal-percentage
• Built-in position feedback and manual override capability
• Automatic calibration with wear-free inductive stroke measurement
• Fail-safe design: path A to AB closes when de-energized

Suitable for water or water/glycol mixtures up to 50% glycol concentration, with an operating temperature range of 34 to 266°F. The robust, maintenance-free construction ensures long service life in demanding HVAC applications. UL and C-UL listed for safety compliance.