Pressure-independent regulating valve AB-QM, DN20 with measuring connections, Male thread. Nominal flow rate 1900 l/h 003Z8204

Pressure independent regulating valve – precision and savings in HVAC systems

The Danfoss AB-QM regulating valve is a pressure-independent solution designed for precise flow control in terminal units of HVAC heating and cooling systems, such as fan coil units and chilled beams. Its unique design with 100% authority ensures unparalleled control performance, even under changing operating conditions. This valve is particularly valued for its ability to easily set the required flow rate, eliminating complex Kv calculations for designers.

Design and application

AB-QM is designed for reliability and durability. Its construction minimizes the risk of clogging and scale build-up, resulting in a long service life and minimal operating costs. The valve is available in DN20 size, equipped with an external thread and measuring connections to facilitate integration with the measurement system. The nominal flow rate of 1900 l/h makes it an ideal solution for a wide range of applications. The pressure class PN 25 ensures safe and stable operation in typical installations. The stroke length of 4 mm allows for precise adjustment of the flow rate to current needs.

Advantages and benefits for installers and users

• Simple installation and configuration: The desired flow is set by turning the adjustment knob in the range of 10-100% of the nominal flow – quickly, easily and without the need for specialized tools.
• High control accuracy: The valve's 100% authority guarantees accurate flow control, regardless of pressure changes in the installation. This translates into thermal comfort and optimized energy consumption.
• Versatility: The AB-QM valve works perfectly with various types of actuators, including the Danfoss NovoCon S digital actuator, offering flexibility in selecting components for specific project needs.
• Durability and reliability: The construction resistant to scale build-up and clogging ensures long-term trouble-free operation of the valve, minimizing service costs.
• Energy saving: Precise flow control optimizes the operation of boilers and chillers, reducing energy consumption and lowering building operating costs.
• Easy diagnostics: Measuring connections allow monitoring of valve operating parameters and quick identification of any problems.
• Universal application: Ideal for air handling units, chilled beams, fan coil units and other terminal units in HVAC heating and cooling systems.

The AB-QM valve is an investment in comfort, energy efficiency and reliability of the HVAC system – both for professionals involved in installation and for end-users benefiting from heating or cooling.