Wilo Stratos 50/1-9 (DE) circulation pump – 3rd piece

Wilo – premium German pump technology

Operating since 1872, the premium German manufacturer Wilo specializes in heating, cooling, and water technology pumps. Its electronically controlled devices support circulation tailored to system demands.

Stratos 50/1-9 – electronic circulation with DN 50 connection

DN 50, 280 mm installation length: adjustable circulation pump for larger heating, cooling, and HVAC circuits.

Main advantages

• Constant or variable differential pressure: the operating mode can be adapted to the network.
• Electronic speed control: circulation is adjustable depending on the load.
• Single-button operation: easily accessible on-site settings.

Manufacturer data – Stratos 50/1-9 PN 6/10

• Installation length: 280 mm; DN 50 flanged connection.
• Power supply: 230 V, 50/60 Hz.
• Maximum operating pressure: 10 bar.
• Medium temperature: −10…+110 °C.
• Characteristic curve limits: 9.1 m head; 29.0 m³/h flow rate. Separate limit points.

Documented list price of the new successor model

Stratos MAXO 50/0,5-9 PN 6/10, 2164588: 4,692.36 EUR net. List price without VAT on Wilo's Dutch product page; verified on: October 5, 2026. A new pump with factory thermal insulation casing; shipping and installation separate.

The MAXO is a different, newer model. The manufacturer designates it as a replacement for the original Stratos 50/1-9; the price is not the exact new price of the old Stratos.

Technical source: Wilo original type datasheet; Stratos factory manual.

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