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The Hydrun Pressure Maintenance/Degassing Combo combines dynamic pressure maintenance and vacuum degassing in a fully automatic unit. It ensures the correct system pressure at all times—and once the pressure is stable, it removes dissolved gases via a bypass flow for quieter, smoother, and more reliable heating and cooling system operation.
Clear connection logic and preset values reduce on-site time.
Removes dissolved gases/microbubbles and reduces corrosion, cavitation, and wear in the system.
Proven, service-friendly components from Grundfos, Danfoss, and Schneider Electric.
Modbus TCP, RTU, and BACnet for alarms, status, and logging directly to DDC/BMS as standard.
The unit can be installed with both open and closed expansion vessels.
Save energy by continuously reducing the amount of dirt and magnetite in the system.
Function and performance verified in independent tests by Research Institutes of Sweden.
Swedish manufacturing with traceable quality, short lead times, and quick access to spare parts.

Model
HY-PD-40
Previous name: PD-X 40
Previous item no.: HL2410
RSK number: 503 40 24
Operating pressure: 0.8 - 4 bar
Pressure class: 10 bar
Operating temperature: 0-70°C
Voltage: 230V single-phase
Fuse: 10 A
Power: 0.75 kW
Communication: Modbus TCP, RTU, and BACnet
Media: Glykol <50%, Etanol <29%
Connections: DN15
Dimensions: D:250 x W:500 x H:750mm
Weight: 32.6 kg
Model
HY-PD-40-AF (Autofill)
Previous name: PD-X 40A
Previous item no.: HL2411
RSK number: 553 30 39
Operating pressure: 0.8 - 4 bar
Pressure class: 10 bar
Operating temperature: 0-70°C
Voltage: 230V single-phase
Fuse: 10 A
Power: 0.75 kW
Communication: Modbus TCP, RTU, and BACnet
Media: Glykol <50%, Etanol <29%
Connections: DN15
Dimensions: D:250 x W:500 x H:750mm
Weight: 32.6 kg