Danfoss 003Z0781 2″ AB-QM Pressure Independent Control Valve 22-55 GPM

Description

Danfoss AB-QM Pressure Independent Control Valve (PICV) — 2″, 22–55 GPM

The Danfoss 003Z0781 is a 2-inch AB-QM Pressure Independent Control Valve (PICV) designed for hydronic heating and cooling systems. By combining automatic flow limiting, differential pressure control, and modulating flow control into a single compact valve body, the AB-QM eliminates the need for separate balancing valves and differential pressure controllers — simplifying system design, reducing installation time, and ensuring precise flow regulation across a wide operating range.

Product Overview

The AB-QM PICV is engineered for variable flow hydronic systems in commercial and institutional buildings. It maintains a constant, pre-set maximum flow rate regardless of pressure fluctuations in the system, ensuring that each terminal unit receives exactly the flow it requires. This pressure-independent operation results in improved comfort, energy savings, and dramatically simplified commissioning.

Key Features

• Pressure independent design combines balancing, differential pressure control, and flow control in one valve
• 2-inch valve size suitable for medium-to-large terminal units and AHUs
• Flow range: 22–55 GPM, field-adjustable to match system design requirements
• Eliminates the need for separate balancing valves and differential pressure controllers
• Ensures accurate flow distribution regardless of system pressure variations
• Simplifies commissioning — no system balancing required after installation
• Compatible with Danfoss AME and AMB series electric actuators for modulating or on/off control
• Suitable for both heating and cooling hydronic applications
• Robust construction for long service life in demanding commercial environments

Application

The Danfoss AB-QM PICV is ideal for variable flow hydronic systems in commercial buildings, hospitals, universities, hotels, and industrial facilities. It is particularly well-suited for use with fan coil units, air handling units, and chilled beam systems where precise flow control and energy efficiency are critical.

Why Choose the Danfoss AB-QM?

• Reduces installation complexity with an all-in-one valve solution
• Improves energy efficiency by ensuring optimal flow at all times
• Enhances occupant comfort through consistent temperature control
• Lowers commissioning costs — self-balancing design means no manual balancing required
• Trusted Danfoss quality and global HVAC industry reliability

Specifications

• SKU: 003Z0781
• Brand: Danfoss
• Valve Series: AB-QM (Pressure Independent Control Valve)
• Valve Size: 2 inch
• Flow Range: 22–55 GPM
• Valve Type: Pressure Independent Control Valve (PICV)
• Application: Hydronic Heating & Cooling