Overview of important reference data
1988

Foundation of the company
Specialisation on submersible agitators for agriculture and sewage treatment technology

1989

Sewer pig: Use of submersible agitator for purging sewers on a self-propelled chassis (the agitator pulse is used for propulsion).

1989

Aeration add-on for submersible agitators to aerate the slurry and sludges

1990

TRV submersible agitator with complete stainless steel housing – a global innovation at the time.
Explosion-proof submersible agitator with ATEX approval.

1991

Submersible agitators with compressed air drive for mixing containers in chemical applications (explosion protection zones)

1991

TKP submersible centrifugal pump for thick matter

1992

ATP large vane-submersible agitators in the power range from 0.75 to 5.5 kW with propeller diameter up to 2800 mm, completely in stainless steel

1994

First use of the BIOBULL® large-vane agitators in a biogas plant

Biobull fermenter agitator, ceiling mounting

1995

Submersible agitator for paints (used at VW in Emden, for example) Frequency inverter for energy-saving operation of large-vane agitators

2000

Digestion tower mixer

2005

Vertical agitator for biogas plants

2006

BIOSUBSTRATOR® horizontal agitator for biogas plants

2007

Vertical agitator for smaller heat exchangers

2008

Gas-tight adjusting device for submersible agitator in Biogas fermenters

2010

Relocation of the company premises to Pettermandstraße BULLDOS® agitator with integrated BULLDOS® solid feed HYDROBULL® mixing system for pre-pits and hydrolysis systems

2013

Company`s 25th anniversary
New series of medium-fast and slow-running submersible agitators

2014

streisal SafeGuard TSR monitoring system for submersible motor agitators

streisal GmbH Downloads

Biobull - Fermenter Agitator - Brochure

Biosubstrator - Slow-Running Biogas Rod Agitators - Brochure