Danfoss AB-QM was the first of its kind control valve for HVAC heating and cooling applications. The Danfoss pressure independent valves are control valves with automatic flow limitation and built-in differential pressure control functioning over the control valve. The result of this concept is a high performing control valve with a – still – unique valve authority of 100%. The design flow can easily be set to the needed amount by using a 20-100% scale. Simply setting the design flow replaces traditional commissioning processes, gives a much more accurate control and avoids Kv calculations for system designers.
Danfoss Pressure Independent Valves - AB-QM
Danfoss Pressure Independent Valves - ChangeOver6
AB-QM 4.0 / ABQM Pressure Independent Control Valves
Danfoss NovoCon® digital actuator
AB-QM 4.0 Flexo with AB-QM valve
Danfoss Application Guide