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The LIBRA Pressure Independent Control Valves (PICV) are suitable for a wide range of hydronic applications in the field of heating and environmental conditioning of buildings. Fan-coil units and chilled beams are probably the most common applications of regulating valves and dynamic balancing with the passage to the use of 4-way (or 3-way) 2-way valves, to meet the needs of reducing energy consumption both electric and circulation pumps and thermal for leakages through the pipes.
Manufacturer: Controlli

The LIBRA Pressure Independent Control Valves (PICV) are suitable for a wide range of hydronic applications in the field of heating and environmental conditioning of buildings.
Fan-coil units and chilled beams are probably the most common applications of regulating valves and dynamic balancing with the passage to the use of 4-way (or 3-way) 2-way valves, to meet the needs of reducing energy consumption both electric and circulation pumps and thermal for leakages through the pipes. In the choice of 2-way valves to be used in variable flow systems, particular attention is paid to some of the problems that may arise in systems where the pump speed is designed to change in response to the thermal demand.
The fluctuations Flow rates initiated by the positioning of the 2-way valves in response to different occupancy levels and heat losses cause pressure changes in the system, resulting in instability of flow through all the valves. The system is effectively unbalanced, resulting in constant search for valves to maintain control. An unstable system has a direct impact on energy consumption, living comfort, noise and maintenance costs. To ensure accurate temperature control in the spaces of buildings where the system pressure is maintained by a variable or constant speed pump, it is essential that pressure variations do not influence the flow through the terminal units. The solution consists of installing 2-way control valves able to maintain effective flow control regardless of the variation in system pressure caused by changes in pump speed or the operation of other valves. The independent control valves from the pressure, often identified by the acronym PICV from the English Pressure Independent Control Valve, are exactly what the first name. They maintain a constant predetermined differential pressure through an adjustment valve such that the valve action is not affected by the instability of the inlet pressure.

The LIBRA Pressure Independent Control Valves (PICV) are suitable for a wide range of hydronic applications in the field of heating and environmental conditioning of buildings.
Fan-coil units and chilled beams are probably the most common applications of regulating valves and dynamic balancing with the passage to the use of 4-way (or 3-way) 2-way valves, to meet the needs of reducing energy consumption both electric and circulation pumps and thermal for leakages through the pipes. In the choice of 2-way valves to be used in variable flow systems, particular attention is paid to some of the problems that may arise in systems where the pump speed is designed to change in response to the thermal demand.
The fluctuations Flow rates initiated by the positioning of the 2-way valves in response to different occupancy levels and heat losses cause pressure changes in the system, resulting in instability of flow through all the valves. The system is effectively unbalanced, resulting in constant search for valves to maintain control. An unstable system has a direct impact on energy consumption, living comfort, noise and maintenance costs. To ensure accurate temperature control in the spaces of buildings where the system pressure is maintained by a variable or constant speed pump, it is essential that pressure variations do not influence the flow through the terminal units. The solution consists of installing 2-way control valves able to maintain effective flow control regardless of the variation in system pressure caused by changes in pump speed or the operation of other valves. The independent control valves from the pressure, often identified by the acronym PICV from the English Pressure Independent Control Valve, are exactly what the first name. They maintain a constant predetermined differential pressure through an adjustment valve such that the valve action is not affected by the instability of the inlet pressure.