Single-stage, low-pressure double pump in in-line design with:

  • Switchover valve
  • Mechanical seal
  • Flange connection with pressure measuring connection R 1/8
  • Lantern
  • Coupling
  • IEC standard motor

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

  • Reduced life cycle costs through optimised efficiency
  • Can be used flexibly in air-conditioning and cooling systems, with application benefits due to direct draining of condensate via optimised lantern design (patented)
  • High standard of corrosion protection thanks to cataphoretic coating
  • Main/standby mode or peak-load operation (by means of external auxiliary device)


  • 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 200
  • Max. operating pressure 16 bar
  • Material(s) Pump housing and lantern: Standard: EN-GJL-250, Impeller: Standard: EN-GJL-200; special version: Bronze CuSn 10, Shaft: 1.4122, Mechanical seal: AQEGG; other mechanical seals 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; Blind flanges
  • Optional features L1 variant with bronze impeller (at additional charge), Other voltages and frequencies as well as ATEX approval on request