Virtus | Heavy-duty Pressure and Flow Controllers

Virtus is Danfoss‘ series of digital empowered pressure and flow controllers for hydronic balancing and control in district heating and cooling networks. Optimal hydronic balance can result in up to 20% energy saving and improved comfort because of perfect temperature (delta T) control. Virtus is a range of heavy duty differential pressure regulators and flow regulators for demanding district heating and cooling applications. They are designed to be used in power plants for energy production, transportation networks, distribution network stations and subscriber (building) substations.​

DPC (Differential Pressure Controllers, in most cases used in combination with a Motorized Control Valve (MCV))​ with these type of control options:

PICV (Pressure Independent Control Valves with integrated flow limiter) with these type of control options:

All Virtus controllers are build-up from a valve and a pressure actuator (also known as a pressure regulator) and are self-acting. This means they work independent of electrical energy, ensuring a high level of reliability. Most of the controllers can optionally be equipped with a remotely accessible digital actuator to optimize the performance. There is iNET functionality for intelligent NETwork balancing and iSET functionality for intelligent substation SETting. Via AMEi 6 digital actuators the set pressure or flow on the Virtus pressure actuator is electronically adjusted to increase stability and precision in especially partial load system conditions.

Many pressure or flow controllers are found in existing situations. Here it is challenging or undesirable to exchange for a Virtus solution. For these situations where Danfoss VFG 2 or VFQ 2 valves are already in use, there is low-impact Virtus retrofit solution. The valve can continued to be used, just the pressure actuator is replaced for a Virtus actuator. All that's needed is a special adapter and (a) new impulse tube(s). Most of the new Virtus pressure actuators can also be utilized for digital optimization with iNET or iSET.

Having installed iSET or iNET intelligent actuators on Virtus, it enables substation or network optimization by digitalization. The intelligent actuators remotely adapt the set point and are the interlink with our electronic ECL Comfort controllers and ​Leanheat® software suite for monitoring and data-driven optimization.