Single-stage low-pressure centrifugal pump in block design, with axial suction port and radially arranged pressure port with:

  • Mechanical seal
  • Flange connection with pressure measuring connection R 1/8
  • Lantern
  • Coupling
  • Drive with integrated electronic speed control

Fo pumping of heating water (acc. to VDI 2035), cold water and water/glycol mixtures without abrasive substances in heating, cold water and cooling systems.

  • Energy savings due to integrated electronic control
  • Optional interfaces for bus communication using plug-in IF-Modules
  • Simple operation due to tried-and-tested red-button technology and display
  • Integrated full motor protection (PTC thermistor sensor) with trip electronics
  • Meets user requirements due to performance and main dimensions in accordance with EN 733 (DIN for norm pumps)



  • Minimum Efficiency Index (MEI) ≥ 0.4
  • Permissible temperature range -20 °C to +140 °C
  • Mains connection 3~440 V -5/±10 %, 50/60 Hz; 3~400 V ±10 %, 50/60 Hz; 3~380 V -5/±10 %, 50/60 Hz
  • Protection class IP 55
  • Nominal diameter DN 32 to DN 125
  • Max. operating pressure 16 bar (optionally 25 bar on request)
  • Material(s) Pump housing and lantern: Standard: EN-GJL-250; optional: Spheroidal cast iron EN-GJS-400-18-LT, Impeller: Standard: EN-GJL-200; optional: Bronze CuSn 10, Shaft: 1.4122, Mechanical seal: AQEGG other mechanical seals on request
  • Optional features L1 variant with bronze impeller (at additional charge), H1 variant with housing made of spheroidal cast iron (at additional charge), S1/-S2 variant with special mechanical shaft seal (at additional charge)
  • Accessories Brackets with fixation material for installation on a base; IR-Monitor, Wilo-IR-Stick; IF-Module PLR for connecting to PLR/interface converter; IF-Module LON for connection to the LONWORKS network; IF-Module BACnet; IF-Module Modbus CAN; IF-Module VR-HVAC control system; Control system CCe-HVAC; Control system SCe-HVAC; Differential pressure sensor (DDG)