Alfa Laval Bottom Mounted Agitator Type ALB

Alfa Laval Tank Agitator - ALB

The bottom-mounted agitator ALB offers mixing solutions to meet any requirements in food, dairy, beverage, pharmaceutical, biotechnology and cosmetic applications. Type ALB agitators can be sized for several applications for both atmospheric and pressurised tanks. Configuration for use in sterile/aseptic applications is also possible. Sizing and customising the agitator to the specific task ensures optimised power consumption and pricing.

Application Typical examples
Maintain media homogeneous Milk storage tanks, mixed product tanks, UHT storage tanks etc.
Mixing and Solutions (dissolves) Fluid and fluid mixing, i.e. drinking yoghurt and fruit mix tanks, flavoured milk mix tanks, syrup mix tanks, etc.
Solid Dispersion Powder + fluid mix tanks, etc.
Suspension Fluids with particles, i.e. juice tanks
Heat transmission Circulation of media in tanks with dimple jacket (cooling or heating)

Technical Data

Motor size and speed as required for duty. As standard with IEC motor IP55, other types on request. As standard painted RAL5010.

Voltage and frequency
As standard for 3×380 to 420V, 50Hz – 3x440V to 480V, 60Hz. All motor voltages and frequencies are available.

Different gear types available according to configuration. As standard filled with normal synthetic or mineral oil, optional: Food approved oil. As standard painted RAL5010.

ATEX – option
Agitators can be delivered approved for use in an ATEX environment with declaration of conformity.

Physical Data

List the range of materials available for wetted parts:
Steel parts: . . . . . . . . . . . . . . . . . . AISI 316L (standard). . . . . .Other materials on request.
Seal rubber parts (o-rings or bellows): . . . . . . . . . . . . . EPDM. . . . . .FPM/FEP (only for stationary O-rings). . . . . .FPM. . . . . .Other materials on request.
Specific selection of materials will depend on the actual configuration selected.

Material certificate – option
3.1 Material certificates/FDA conformity statement according to 21 CFR177 on steel/elastomer parts in contact with media

Standard propeller diameter range: ø125 mm to 1900 mm. Specific dimensions on the drive unit and propeller(s) will depend on the actual configuration selected.

Standard design

The Alfa Laval range of bottom mounted propeller agitators is designed to meet almost every customer requirement. Due to their modular build the agitators can be designed for every type of application with the hygienic industry. The modular construction is designed with the aim to meet both European and American standards and regulations, such as EHEDG, USDA, FDA, 3A etc.

Configurable design

Type ALB agitator design is fully configurable divided in the following elements:

  • Drives (drive + shaft support + shaft diameter)
  • Seal arrangements (oil trap + shaft seal type)
  • Shaft (length)
  • Energy Saving Foils (propeller type + surface finish)
  • Options

Each element has a broad range of different characteristics which makes it possible to size the agitator for all applications and requirements.

Advantageous and profitable design

Each configuration offers a number of advantages, which are shown in the examples below:

Operation features Due to
Low energy consumption the wide range of high efficiency propellers and drive units makes it possible to design for low operational costs
Gentle product treatment the wide range of high efficiency propellers makes it possible to design for low shear operation


Hygienic features Due to
Easy external cleaning stainless steel bearing frame design with seal O-rings (for washing)
Connections inside the tank (risk zones) can be minimised bearing frame drives with drive shaft and special internal shaft connection without having a flange coupling inside the tank
Good drip off properties no plane surfaces or grooves on internal parts
Easy cleaning no interior shadow sides between the blades and smooth surfaces


Maintenance features Due to
All service (replacement of wearing parts such as shaft seals, bearings etc.) can be done from outside the tank bearing frame drives with detachable shaft which can be dismounted from outside the tank
Easy dismantling use of spider type coupling and stainless steel parts