Description
Danfoss AB-QM Pressure Independent Control Valve (PICV) — 003Z0780
The Danfoss AB-QM (003Z0780) is a 1-1/2″ Pressure Independent Control Valve (PICV) designed for hydronic heating and cooling systems requiring precise, stable flow control across a wide operating range of 7 to 33 GPM. By combining a differential pressure regulator, a flow-limiting cartridge, and a modulating control valve into a single compact body, the AB-QM eliminates the need for separate balancing valves and simplifies system commissioning.
How It Works
The AB-QM maintains a constant differential pressure across the control element regardless of system pressure fluctuations. This ensures that the flow delivered to each terminal unit corresponds exactly to the actuator signal, providing accurate temperature control and eliminating the hydronic imbalance common in variable-flow systems.
Key Features
- Pressure independent design combines differential pressure regulation and flow control in one valve body
- 1-1/2″ valve size with a wide flow range of 7–33 GPM for flexible application coverage
- Eliminates the need for separate commissioning and balancing valves
- Stable flow delivery regardless of system pressure variations
- Compatible with Danfoss AME and AMB series electric actuators for automated modulation
- Suitable for both heating and cooling hydronic applications
- Compact, integrated design reduces installation time and material costs
- Designed for variable-flow, two-pipe hydronic systems in commercial HVAC applications
Typical Applications
- Fan coil units and air handling units
- Chilled beams and radiant ceiling panels
- Variable air volume (VAV) terminal units with hydronic coils
- Commercial and institutional hydronic distribution systems
Why Choose the Danfoss AB-QM?
The AB-QM series is a trusted solution for engineers and contractors who demand reliable hydronic balancing without the complexity of multi-component valve trains. Its all-in-one design reduces installed cost, minimizes potential leak points, and ensures that each zone receives precisely the flow it needs — every time.
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