Controlli Libra PICV: a dynamic balancing act

Libra PICV

Controlli Libra PICV are ideal for use in heating/cooling variable flow systems and provide constant flow regulation within a given range of differential pressure drop. Dynamic balancing eliminates overflows regardless of fluctuating pressure conditions in the system. The main feature of LIBRA valves is that they are valves that can control the water flow independently of differential pressure as long as it remains within a range of 0.35 bars up to 6 bars. A LIBRA valve replaces up to three separate valves, reducing installation and commissioning time and costs; It incorporates a 2-way control valve, a flow calibration valve and a differential pressure control valve.

Libra PICV

Libra PICV: 3 valves in 1

Kit for FCUs Libra PICV
Kit for FCU

» One PICV replaces up to three separate valves (a 2-way control valve, a flow limiting valve, a differential pressure control valve)

» Constant flow regulation under varying pressure conditions

» Constant differential pressure across the control valve regardless of changes in pump speed or valves closure elsewhere in the system
» Linear valve characteristic regardless of the pre-set value
» 100% stroke always
» No cartridge design
» Very low hysteresis
» PICVs can be supplied as a complete hook-up kit for FCUs.

Easy selection & commissioning

» Always select the smallest valve capable of delivering the design flow rate
» Very quick selection also with thousands of units thanks to our PICV selection tool
» Simple commissioning: it is just a matter of selecting one of the preset values on the valve calibre
» Use our formulas for valve calibre setting for a quick flow estimation
» Easy ΔP measurement with our DMP700 differential pressure meter (up to 700kPa)

New electro-mechanical actuators for PICVs


MVC503R Libra PICV
MVC503R Modbus

» Electronic emergency return (with capacitor)
» 300 N force
» Fast opening/closing times
» Self-stroking and self-adjusting
» 24 Vac/dc power supply
» Control signals: 0..10 V / 2–10 V / 4..20 mA
» Feedback signal: 2..10 V

Additional features available on MVC503R-MB

» Control signals & Feedback signal via Modbus
» PICV flow curve changing, linear to equal-percentage
» Actuator speed selection
» and much more via Modbus

Contact IBC

For quotes and queries talk to Keith Rickard at [email protected] or phone +353 1 457 5421

Download datasheet