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
  • IEC standard motor

For pumping heating water (in accordance with VDI 2035), water-glycol mixtures, cooling water and cold water without abrasive substances in heating, cold water and cooling water systems.

  • Reduced life cycle costs thanks to optimized efficiency
  • High corrosion protection through cataphoretic coating of the cast iron components
  • Standard condensate drainage holes in the motor housings
  • High worldwide obtainability of standard motors (according to Wilo specifications) and mechanical seals
  • 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 3~400 V, 50 Hz (others on request)
  • Protection class IP 55
  • Nominal diameter DN 32 to DN 125
  • Max. operating pressure 16 bar (optionally 25 bar on request)
  • Optional features L1 variant with bronze impeller (at additional charge), H1 variant with housing made of spheroidal cast iron (at additional charge), Other voltages and frequencies as well as ATEX approval on request
  • Accessories Mounting brackets for installation on a base, PTC thermistor sensor, PTC resistor tripping relay, Special motors, Special mechanical seals, SC-HVAC, CC-HVAC control systems and switchgears