Wilo Stratos 40/1-12 PN 6/10 circulation pump

Wilo – premium German pump technology

Operating since 1872, the premium German manufacturer Wilo specializes in heating, cooling, and water technology pumps. Its electronic circulators support operation adapted to system requirements.

Stratos 40/1-12 – adjustable circulation

DN 40 flanged connection, 250 mm installation length. For circulation tasks in larger heating and cooling circuits, and heat distribution centers.

Key benefits

• Adjustable differential pressure: Constant or proportional differential pressure can be selected to suit heating circuit requirements.
• Electronic speed control: The pump adjusts its operation to the changing volume flow demand, mitigating unnecessary circulation.
• Constant speed operating mode: A fixed operating characteristic curve can also be selected for hydraulic tasks requiring it.
• Automatic setback mode: In activated automatic mode, it detects lower heating demand from the decrease in medium temperature and reduces performance.
• Local display and single-button operation: Settings, operating statuses, and error codes can be monitored directly on the pump.
• Electronic overload protection: In case of overload, the built-in protection stops the drive.
• Periodic anti-blocking start: Under appropriate control conditions, the pump helps prevent seizure during longer periods of inactivity with regular short starts.
• Combined fault signal: With the SSM contact, the pump fault signal can also be connected to external monitoring.

Important factory data

• Power supply: 230 V, 50/60 Hz.
• Maximum operating pressure: 10 bar.
• Medium temperature: −10…+110 °C.
• Energy efficiency index: EEI ≤ 0.20.

Documented new model comparison

Stratos MAXO 40/0,5-12 PN 6/10, 2164584: 3,799.07 EUR net. The list price without VAT on Wilo's Dutch product page; verified: October 5, 2026. A new pump with factory thermal insulation casing; installation and delivery separate, communication expansion module optional.

New equipment price source – open ↗

Comparative price of a newer, different model of the MAXO. Technical source: original Wilo type datasheet; Factory documentation – open ↗.

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