Pressure-independent regulating valve AB-QM, DN15 without measuring connections, Male thread. Nominal flow rate 650 l/h 003Z8221

Independent Pressure Differential Valve Danfoss AB-QM – Precision and Efficiency in HVAC Systems

The Danfoss AB-QM valve is a pressure-independent characterising control valve (PICV) designed for use in HVAC heating and cooling systems such as fan coil units, chilled beams and air handling units. Its unique design with a 100% authority ensures exceptional flow control performance, regardless of pressure fluctuations in the installation. This is an ideal solution for both professional installers and end-users looking for a reliable and efficient way to control temperature.

Characteristics and Application

The AB-QM valve is designed for automatic flow limitation and precise differential pressure control. This allows for optimization of the entire system, increasing user comfort and reducing operating costs. Thanks to the ability to pre-set the flow rate in the range of 10-100%, the system start-up process is simplified, and selecting the appropriate valve size becomes less complicated than with traditional solutions. This valve finds wide application in office buildings, apartments, and industrial facilities.

Advantages and Benefits

• Pressure Independence: Ensures stable system operation regardless of pressure fluctuations in the installation.
• 100% Authority: Guarantees high regulation accuracy even with low flow requirements.
• Easy Setting: Simple percentage flow scale facilitates quick and accurate setting of the required nominal flow.
• High Durability and Reliability: Solid brass construction ensures long-lasting and trouble-free operation.
• Compatibility with Danfoss NovoCon S Actuators: Possibility of cooperation with advanced digital actuators for even greater control precision.
• Cost Optimization: By ensuring the appropriate flow at the right time, the valve optimizes the efficiency of the boiler and chiller and reduces pumping costs.
• Increased Energy Efficiency: Precise flow control translates to lower energy consumption.
• Simple Installation: The valve has a metric external thread (M30 x 1,5) which facilitates its installation in existing installations.

The AB-QM valve is characterized by a linear control characteristic and the possibility of setting lock, which further increases its functionality and safety. It is available in sizes DN 10-250, allowing it to be adapted to different installation needs. The valve height is 75 mm, and the device pressure class is PN 25. The nominal flow rate is 650 l/h (0.65 m³/h). The stroke length is 4 mm. The material of construction is brass (material grade: Other).