Long shaft agitator

Long shaft agitator from ARMATEC

More then 3000 Armatec long-shaft agitators are installed worldwide! You can mix substrates like renewable raw materials, manure, grops, mais, grass or food and kitchen waste.

From the preliminary pit and the hydrolysis tank to the main – post digesters up to the end storage tanks you can use our long-shaft agitators.

For dimensions please refer to the Datasheet


  • Electrical motor outside the tank – easy maintenance work
  • Explosion zone II certificated
  • Swivel axis outside the tank
  • Drive shaft have multiple bearings and runs in a oil-bath
  • Suitable for concrete or steel tanks
  • Ceiling installation or for side-entry though the wall

Double corrosion protection

  • Hot dip galvanizing
  • Tar epoxy coating
  • or ss304 or ss316 stainless steel Version

Easy Installation  The installation is very easy: you have to fix the base-frame at the set-in concrete frame.

Highest stirring performance and perfect homogenisation – in short-term operating times

  • For 24-hour operation
  • Wide pivoting range – agitator length up to 5,5m: possible to change and adjustable during operation (floor support not neccessary)
  • Motor power from 11 – 22 kW
  • 2 or 3 Propeller with a rotation speed of 201 rpm. – perfect for the bacterial growth. We have pulling or pushing propellers with 8mm blades and different diameters (Ø880 – Ø950). The upper propeller is adjustable on the agitator tube.


For Side- & Ceiling Installation in 15,0, 18,5 or 22,0 kW


Biogas tanks: Hydrolysis–Degester–End Storage
Dry matter contend up to 15 %
Substrate temperature up to 70°C
pH value 6,5 – 8,5

Homogenisation at all Levels by 2 Propeller
From bottom to top (pull) or
from top buttom (push)


Gear unit, helical cut, low noise
Explosion proofed for Zone II
Gear reduction: i = 7,27
Output speed: 201 rpm (50 Hz) or 199 rpm (60 Hz)
Oil chamber, gear oli ISO VG 220 Mineralöl
Oil change after 500 and 10.000 operating hours (every 2 years)


Installation through the wall or ceiling
Tanks: Concrete / Enameled glass line tank / Stainless / Lagoon
Installation depth 3,0 m under Maximum level
Frame for concrete set-in: 1,15 x 1,15 m
Other dimensions on request


Rotation speed: 201 rpm (50 Hz) or 199 rpm (60 Hz) 2 – 3 propeller: pulling, pushing or
Universal for right/left
Ø 880 – 1.000 mm
8 mm thickness of the plates, coated steel or stainless steel V2A/ V4A Upper Propeller adjustable on the axis


Agitator length: 4,5 / 5,0 / 5,5 m (lenght in the tank) Protection tube: Ø 127 mm stainless steel
Drive shaft: Ø 89 mm ss304, multiple bearings runs in an oil bath (SAE 80 W 90)
Support tube: for drive shaft, protection tube, Support cover and coupling (powder-coated)
Base frame with Support cover Ø 880 mm (gas-tight), galvanized and epoxy coated (stainless steel on request)
Double sealing membrane EPDM
Sound pressure level: 78 dB(A) without acoustic hood I 71 dB(A) with acoustic hood


Lateral adjustment (Support cover): 360 °
Tilt adjustment up to 45 ° with top link
Swivel axis out of the tank


Power: 15,0 I 18,5 I 22,0 kW Voltage: 400 V or 460 V
Frequency: 50 Hz or 60 Hz
Rotation speed: 1.460 rpm or 1.760 rpm Ex-Motore: II 3G Ex n II T3
Motor protection: 3 x PTC 160° Efficiency class: IE 2 Oil reservoir


We recommend the following:
– Soft starter
– Frequency converter
– Supplied without connecting

Below you will find examples of our long shaft agitators in operation

Do You Have Questions? Do you require a quotation?

Please feel free to contact us!

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