The Danfoss AB-PM DN 20 is a combined automatic balancing valve designed for the hydraulic balancing of residential and commercial heating systems. In one compact body, it integrates three functions: a differential pressure controller, a linear control valve, and an automatic flow limiter. This ensures correct heat distribution even under partial load conditions, quiet operation, and significantly simplifies installation.

Features

• 3 functions in 1 valve – Δp controller, control valve with linear characteristic, and flow limiter
• Automatic hydraulic balancing without the need for manual adjustment whenever the load changes
• Quiet operation thanks to a stable low Δp across thermostatic valves, even at higher pump head
• Compact DZR brass body – also suitable for manifold cabinets with limited space
• Flow setting in the range of 20–100% (120–600 l/h at Δpr = 10 kPa) with locking to prevent unauthorised adjustment
• Option to connect a TWA-Q On/Off actuator for zone control (night setback, holiday mode)
• Supplied with 1.5 m impulse tube and connection adaptor
• Suitable for use in heating systems and underfloor heating systems