Solar pump groups
Double solar station with Grundfos UPM3 Solar 25-145 pump
A double solar pump group with the Grundfos UPM3 Solar 25-145 circulating pump, designed for systems with flat plate and vacuum solar collectors. The two lines make it possible to control the temperature of the solar system heating medium on both the supply and the return.
- Grundfos UPM3 Solar 25-145
- Pump type
- 8–28 l/min
- Flow range
- 6 bar
- Max. pressure
- 480 × 330 × 170 mm
- Dimensions W × H × D
Key features
- 6 bar pressure relief valve
- Pressure gauge 0–10 bar
- Thermometers 0–120 °C
- Air separator
- EPP insulation
Design and equipment
Pump and flow
Grundfos UPM3 Solar 25-145 circulating pump with a 130 mm installation length. Rotameter with solar system filling and emptying valves, flow range 8–28 l/min.
Valves and safety
Ball valves with 0–120 °C thermometers on the high and on the low parameter. A 6 bar pressure relief valve and a group with a 0–10 bar pressure gauge and an expansion vessel port.
Venting and insulation
Air separator with an air vent. Body of brass and powder-coated steel, EPP insulation, EPDM sealing components. Medium – solar fluid only, a non-toxic glycol-water mixture with corrosion inhibitors.