Merten KNX Valve Actuator MEG6921-0001 for Heating and Cooling Systems

The Merten MEG6921-0001 stands out as a KNX valve actuator engineered for precise control of heating and cooling circuits. Unlike basic thermal actuators, it delivers 100 N of actuating force with a 4 mm stroke, suitable for direct mounting on valves with M30 x 1.5 threads or via adapters. Continuous 0-10 V or 2-point/3-point switching control, position feedback, and manual override make it a flexible choice for building automation.

Highlights

• KNX bus system integration with ETS 4.2 or higher
• 24 V AC/DC operating voltage, max. 1 W power consumption
• 100 N actuating force, 4 mm stroke, M30 x 1.5 connection thread
• Continuous (0-10 V) or switching (2-point, 3-point) control
• Position feedback and manual override for commissioning and maintenance
• Valve protection function to prevent seizing
• IP54 protection class, 0 °C to +50 °C operating temperature
• 1 m connection cable

In daily use

This actuator mounts directly on compatible valves or with an adapter, simplifying retrofit and new installations. The manual override allows quick testing without bus commands, while position feedback provides clear status in the ETS. The valve protection function periodically exercises the valve to prevent sticking during long idle periods.

Full specifications

• Product type: Valve Actuator
• Bus system: KNX
• Operating voltage: 24 V AC/DC
• Power consumption: Max. 1 W
• Actuating force: 100 N
• Stroke length: 4 mm
• Connection thread: M30 x 1.5
• Control type: Continuous (0-10 V) or switching (2-point, 3-point)
• Operating temperature range: 0 °C to +50 °C
• Cable length: 1 m
• Protection class: IP54
• Functions: Position feedback, manual override, valve protection
• Mounting: Direct on valve or via adapter
• Compatibility: Compatible with various valve types (e.g., Heimeier, Oventrop)
• ETS software requirement: ETS 4.2 or higher

Final note

For KNX projects requiring reliable valve control with flexible actuation and feedback, the Merten MEG6921-0001 offers a robust solution.