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Series description


Glanded pump in block design with screwed connection or Victaulic connection.


For pumping of cooling water, cold water, water-glycol mixtures and other fluids without abrasive substances.

Type key

ExampleBAC 40/126-1.5/2-S
BACMonobloc pump for cooling and air-conditioning applications
40Pipe connection (pressure port)
126Impeller diameter
1.5Rated motor power P2 in kW
2Number of poles
SScrewed connection
RVictaulic connection

Special features/product advantages

  • Reduced life-cycle costs through optimised efficiency levels
  • Pump housing in plastic design
  • Version with Victaulic or threaded connection (BAC 70/135... with Victaulic connection only)

Technical data

  • Minimum Efficiency Index (MEI) ≥ 0.4
  • Permissible temperature range -15 °C to +60 °C
  • Mains connection 3~400 V, 50 Hz (others on request)
  • Protection class IP 54
  • Screwed connection: G2/G 1½ (type S) or Victaulic connection 60.3/48.3 mm (type BAC 40…-R) or 76.1/76.1 mm (type BAC 70…-R)
  • Max. operating pressure 6.5 bar


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


  • Pump housing: PA 6.6 50% GF
  • Impeller: PA/PPO, fibreglass-reinforced
  • Shaft: X30Cr13
  • Mechanical seal: BQEGG


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

Scope of delivery

  • Pump
  • Installation and operating instructions

General notes - ErP (ecological design-) directive

The benchmark for most efficient water pumps is MEI ≥ 0.70The efficiency of a pump with a trimmed impeller is usually lower than that of a pump with the full impeller diameter. The trimming of the impeller will adapt the pump to a fixed duty point, leading to reduced energy consumption. The minimum efficiency index (MEI) is based on the full impeller diameter.The operation of this water pump with variable duty points may be more efficient and economic when controlled, for example, by the use of a variable speed drive that matches the pump duty to the system.Information on benchmark efficiency is available at with power consumption > 150 kW or a volume flow QBEP < 6 m3/h are not subject to the Ecodesign Directive for water pumps. Therefore, no MEI value is shown.

Duty chart

Pump curves


Approved fluids (other fluids on request)

Water-glycol mixtures (for 20-40 vol.% glycol and fluid temperature ≤ 40 °C)

Heating water (in accordance with VDI 2035)


Cooling and cold water

Permitted field of application

Installation in closed buildings


Integrated full motor protection

Special version with PTC thermistor sensor (KLF) at additional charge

Installation options

Support-bracket mounting


General overview

Edition 2017
Page format A4
Number of pages 72

PDF (46 MB)



Article Number 2036430
Edition 0203
Version number 01
Page format A4
Number of pages 23

PDF (2 MB)



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