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The pumps in standard 3A0/3A1 design and finish can be used for industrial applications, in textile, surface treatment and water technology processes as well as for all plant and process applications in the food, dairy and beverage industries. Thanks to its complete hygienic design and the use of materials with pore free, smooth surfaces the pump is most suited for use in the pharmaceutical industry, medicinal techniques and biotechnological processes. Special fields of application are the pumping of pure water/WFI as well as in plants for the production of parenteralia and injection infusions which have to conform to FDA regulations.



Contra Bloc:

  • Stationary on pump foot, Motor with extended stainless steel shaft, Unshrouded


  • Stationary on cast iron foot
  • Stationary on stainless steel foot
Fields of Application:

Contra Bloc-V:

  • Vertical mounted
  • Stainless steel foot
  • Fully drainable through suction port
Fields of Application:

Contra Bloc-SUPER:

  • Stationary on adjustable stainless steel ball feet
  • Motor with extended stainless steel shaft
  • Stainless steel shroud
Fields of Application:

Contra Adapta®:

  • Stationary on pump foot for fixed installation
  • IEC standard motors or NEMA motors can be connected easily by means of standard coupling, either directly or via an intermediate adapter flange. Single pump shaft size supported in double bearing.
  • The pump can remain in the pipe line when the motor is serviced or replaced.
Fields of Application:

Contra Adapta®-V:

  • Vertical mounted
  • Stationary on stainless steel foot
  • Fully drainable through suction port
Fields of Application:

Contra CN:

  • Stationary, long coupled on base plate complete with flexible coupling and guard.
  • Standard IEC or NEMA motors can be fitted using standard, flexible couplings.


  • Bareshaft
  • With stainless steel base plate
  • With base plate, without motor
Fields of Application:

Surface finish

In order to meet the demands of the pharmaceutical food and beverage industries, HILGE has developed the below surface finish requirements:

Code Application Material Surface finish
3A0.01 Industrial CrNiMo steel  
3A1.02 Hygienic CrNiMo steel Ra ≤ 3,2 µm
3A2.03 Sterile 1.4404/1.4435
(AISI 316L)
Ra ≤ 0,8 µm
3A1.04 Pharmaceutical 1.4435, Fe ≤ 3% Ra ≤ 3,2 µm
3A2.05 Sterile 1.4435, Fe ≤ 1% Ra ≤ 0,8 µm
3A3.06 Sterile 1.4435, Fe ≤ 1% Ra ≤ 0,4 µm
3A3.07 Sterile 1.4404/1.4435
(AISI 316L)
Ra ≤ 0,4 µm
3A2.33 Sterile 1.4404/1.4435, Fe ≤ 3%
(AISI 316L)
Ra ≤ 0,8 µm
3A3.37 Sterile 1.4404/1.4435, Fe ≤ 3%
(AISI 316L)
Ra ≤ 0,4 µm


The construction of the pump is enhanced by the use of rolled and forged stainless steels in quality 1.4404 (316L) and/or 1.4435. The intermediate stages of the multi-stage pumps have open diffusers.

Shaft seals:

Depending on application and media, single or double mechanical seals, tandem or back-to-back, with flushing or sealing water connection. The inboard mechanical seal is cooled and cleanable due to its optimum position in the product flow. Materials selected to suit media pumped. The mechanical seals used for the 3A2/3A3 standard pumps are single inboard mechanical seals with an optimum position in the product flow to ensure cooling as well as CIP cleaning and sterilisation according to the criteria of hygienic design. Materials selected to suit media pumped. Standard materials SiC/SiC/EPDM (FDA conform) Option: material pairing SiC/SiC/Kalrez white

Connection types:

  • Sterile threads to DIN 11864-1
  • Sterile flanges to DIN 11864-2

Other connections available conforming to the following standards: SMS, RJT, IDF, clamp connection to DIN and ISO or other standards, special sterile threaded fittings and sterile small flanges.

Technical data (depending on pump size and number of speeds)

Flow: up to 20 m³/h, Differential pressure: up to 10 bar, Working pressure: up to 16 bar, Operating temperature: up to 140°C, Sterilisationstemperatur bis 140°C

Additional options:

  • Special paint for electric motor. Cast-iron and steel motor parts.
  • Motors with special voltages and frequencies
  • Contra Adapta® and CN with ex-protected three-phase motor EEx e II T3 / EEx de IIC T4
  • Pump with water cooled motor for clean room applications
  • Motors for variable speed drive with integral frequency inverter in the terminal box as "tronic" unit up to 7.5 kW
  • With double mechanical seals, depending on model, with attached flush or thermosyphon systems.
  • Mobile pumps mounted on 2 wheel trolley with on/off switch