Belimo G780+2XAFX24MFTSX1 3-Inch 3-Way Flanged Mixing Globe Valve with Dual Spring Return MFT Actuators

The Belimo G780+2XAFX24MFTSX1 is a complete 3-inch, 3-way flanged mixing globe valve assembly combining the G780 cast iron valve body with two AFX24-MFT-S-X1 spring return actuators. Engineered for precise hydronic flow control in commercial HVAC applications, this factory-matched assembly delivers reliable temperature regulation in heating and cooling systems.

Valve Body (G780) Specifications:

• Valve Size: 3" [80 mm]
• Flow Pattern: 3-Way Mixing
• Cv Rating: 85
• Pipe Connection: 125 lb flanged (ANSI Class 125)
• Body Pressure Rating: Up to 175 psi below 150°F
• Fluid: Chilled or hot water, up to 60% glycol
• Fluid Temperature Range: 32–350°F [0–176°C]
• Flow Characteristic: Linear
• Rangeability: 50:1
• Leakage Rate: ANSI Class III
• Valve Body Material: Cast iron – ASTM A126 Class B
• Valve Plug: Bronze
• Stem: Stainless steel
• Stem Seal: NLP EPDM (no lip packing)
• Seat: Stainless steel AISI 316
• Servicing: Repack/rebuild kits available

Dual Actuator (2x AFX24-MFT-S-X1) Specifications:

• Power Supply: AC/DC 24V
• Torque: 180 in-lb [20 Nm] per actuator (360 in-lb combined)
• Control Signal: Programmable MFT / 2–10V DC default
• Feedback Signal: Programmable position feedback
• Fail-Safe: Spring return, 20-second spring return time
• Run Time: Variable, 150-second default
• Auxiliary Switches: (2) SPDT 3A (0.5A inductive) @ 250V per actuator
• Motor Technology: Brushless DC with Digital Rotation Sensing (DRS)
• Overload Protection: Electronic, stall-safe throughout full stroke
• Electrical Protection: Double insulated; meets cULus requirements
• Warranty: 5-Year Belimo Warranty

The AFX24-MFT-S-X1 actuators utilize Belimo's Multi-Function Technology (MFT), allowing the control input and feedback signal to be fully programmable in the field. The brushless DC motor with ASIC microprocessor control provides a constant rotation rate and precise position awareness without mechanical feedback potentiometers. The spring return system ensures the valve drives to its fail-safe position in the event of a power interruption.

This assembly is ideally suited for air handling units, fan coil units, heat exchangers, and other hydronic terminal equipment requiring reliable 3-way mixing control with programmable fail-safe operation.