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Wilo-BAC | Wilo


The OEM safe solution for Chillers and Heat-Pumps.

Your advantages
Wilo-BAC 50

The OEM safe solution for Chillers and Heat-Pumps.

The Wilo-BAC series is specifically designed for safe integration into Chillers & Heat Pumps, including new generations using the eco-friendly R290 refrigerant. For that purpose, the BAC50 was tested by an external laboratory to verify the compliance to the requirements of clauses 22.116 and 22.117 of IEC 60335-2-40:2022.

Its Victaulic ports make the connection quick and easy. It is available in different power rates with a high interchangeability, providing a high flexibility of usage. Designed specifically for continuous operation, the pump also offers a long service life thanks to its corrosion-resistant materials or coatings and maintenance-free roller bearings.

Recommended services

Your advantages

  • Highest level of safety in heat pumps and chillers due to compatibility with refrigerants up to R290 gas
  • Energy savings thanks to ultra-modern hydraulics and motors​
  • Victaulic connection for quick installation​
  • Optimised pump dimensions for flexibility during replacement​
  • High reliability thanks to top-quality mechanical seal and bearing
  • Low noise due to modern motor design​​
  • optional: Maximum comfort with electrical connection thanks to quick connection plug 

Environmentally friendly properties

  • Efficient pump hydraulics (MEI ≥ 0.7) and usage of IE3 motors for high energy saving
  • Compact design of cast iron components for lowest possible weight
  • Sustainable and carbon-neutral production and processes in our European factories
Series description


Glanded pump in monobloc design with Victaulic connection


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

The BAC50 can be used in R290 heat pumps (in accordance with IEC 60335-2-40).


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



BAC 50/122-1.5/2


Monobloc pump for cooling and air-conditioning applications


Pipe connection (pressure port)


Impeller diameter


Rated motor power P2 in kW


Number of poles

Technical data

  • Permissible temperature range: -15 °C to +60 °C (BAC70)
  • Permissible temperature range: -15 °C to +90 °C (BAC50)
  • Mains connection 3~400 V, 50 Hz (others on request)
  • Protection class IP55
  • Victaulic connection: DN 50 (60.3 mm) or DN 65 (76.1 mm)
  • Max. operating pressure 10 bar (BAC50) or 6.5 bar (BAC70)


  • Pump housing: PA 6.6 50 % GF (BAC70)
  • Pump housing: EN-GJL-250 (BAC50)
  • 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

Installation and operating instructions


Article Number 2036430
Edition 0203
Number of pages 23
Language en
PDF (1 MB)


Article Number 2133933
Edition 2024-04
Number of pages 72
Language de, en, fr, nl
PDF (1 MB)

Certification booklet


Article Number 4251952
Edition 2021-08
Number of pages 20
Language language neutral
PDF (4 MB)

Reference sheet

Reference Sheet (English) - Power industry - Power Station Anpara, Anpara, India, 2014

Number of pages 2
Language en
PDF (2 MB)
Product selection
Number of results: 20
Pipe connection on the suction side DNs
Pipe connection on the discharge side DNd
Maximum operating pressure PN