Danfoss ab-qm 4.0 balancing and control valve dn20 hf with inside thread

Danfoss AB-QM is a Pressure Independent Control Valve (PICV) that combines high accuracy with market-leading ease of use. AB-QM&aposs design is fully geared to ensure that your projects meet your schedule and budget, while providing the most efficient HVAC system. Pressure-independent valves are control valves that have an automatic balancing function. A built-in pressure regulator maintains a constant differential pressure across the control valve, ensuring full authority and automatic flow limitation. By combining two functions in one, regulation and automatic water balance, PICVs from Danfoss offer a cost-effective solution to the challenges that far-sighted designers of HVAC systems face.