Our History

Diefenbach has a long history designing and manufacturing liquid-solid separation equipment. For more than a century, Diefenbach has been providing innovative solutions in a variety of industries and for a wide range of applications.




Diefenbach was founded in Monza, Italy, by Giorgio Diefenbach, who opened a company for the production of presses used to squeeze olives. 


Diefenbach focused production exclusively on filter presses capable of filtering oils and purifying industrial wastewater.

MicrosoftTeams-image (15)1970s

Diefenbach entered the world of mining, providing filter presses for a wide range of liquid-solid separation applications.

Diefenbach Original Overhead Beam Filter Presses1978

Diefenbach launches and supplies first Overhead Beam style Filter Presses


Diefenbach supplies first of many filter presses into use for Lead Acid Battery recycling.  Since that time Diefenbach has supplied around 100 filter presses into Battery recycling applications including Lead Acid Batteries and Lithium batteries.

MicrosoftTeams-image (13)1982

Diefenbach increases presence in the Pharmaceutical sector

MicrosoftTeams-image (14)1983

Diefenbach supplies first filter press into Sand & Aggregates Tailings application.


Diefenbach makes large expansion into the filtration of Synthetic Fibers


Diefenbach supplies 2 Meter x 1.5M Overhead Beam filter press into Budapest to handle Municipal Sludge. 


Diefenbach supplies two filter press into a Copper Concentrate application in Chile.  Following this success Diefenbach has supplied many presses into Copper, Zinc, Gold and Tin Concentrates across the world.


Diefenbach supplies filter press into PAC (Poly Aluminum Chloride) application.  This highly-advanced application requires special resin coating of the steel components of the Filter Press in order to prevent chemical attack.


Diefenbach supplies first Overhead Beam Press with 2 Meter x 2 Meter plates into aTailings Application


Diefenbach and McLanahan enter into manufacturing and supply agreement for European manufacturing of Filter Presses.


Diefenbach enters into an agreement to join the McLanahan Family of Companies and expand its product offering to include industrial thickeners, which are used for liquid-solid separation. Also in 2023, Diefenbach's logo and branding was updated to the drop, highlighting the company's focus on liquid-solid separation and adding "A McLanahan Company" underneath the brand.


About Us

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Lab Testing

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