VSK Archive | LEHMANN INDUSTRIE

Multifunctional Unit SpAF 400 L for Sweden

May 9, 2025
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Today, a unique system leaves the factory gate (like most of our tailor-made technologies, by the way).

This is a multipurpose device that serves as both a filter dryer and a crystallizer in the previous process step. An interesting feature is the hydraulically lowered lower part of the filter using a manually operated hydraulic pump with lever.

The client is a science-led biopharmaceutical company from Sweden

Technical parameters:

working pressure -1 / 3 barg
working temperature -10 / +110°C
total vessel volume app. 400 L, batch volume 300 L, cake volume max.120 L, cake height 250 mm
cylindrical vessel diameter 780 mm, with heating jacket
heating and cooling jacket up to 300 L level
heated bottom
wetted material 1.4404
internal surface Ra ≤ 0,8, grinded, pickled, passivated
jacket, footings, welded cover of thermal insulation etc. 1.4301
bottom hydraulically lifted; hydraulic cylinders manually operated
manually operated hydraulic pump for lifting the bottom, placed on machine frame
ATEX Explosion-proof version (2014/34/EU) – II 2G IIB T3 internal and external space
pressure vessel acc. to the European Directive No. 2014/68/EU (PED)

Experimental reactor made of polypropylene

April 10, 2025
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We designed, manufactured and delivered a tailor-made 200 L pilot reactor for a well-known German engineering company. Reactor, made of polypropylene homopolymer PP-H is intended for the recycling of black mass from lithium-ion batteries.

We manufacture various plastic containers and apparatus, which are produced in accordance with all European machinery directives and standards, as well as the TÜV certificate DIN EN ISO 3824-2:

Storage tanks made of thermoplastic material, made of homogeneous, spirally wound pipes with large diameters from DN 850 mm to DN 4,500 mm
Technological tanks and vessels such as reactors, dilution and dissolution tanks, pickling tanks and other containers for surface treatment
Absorption columns of any size
Droplet separators

We can manufacture plastic tanks according to your drawings or even design them ourselves.

You can find more information here: Plastic Tanks & Process Equipment | LEHMANN INDUSTRIE

Nutsche Filter for the USA

March 11, 2025
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We have just exported a static nutsche filter DN400 to the USA. It’s our design of the type we called with “Hand crank and swing-out lid“.

I believe we managed to do this before the customs surcharge was applied to goods from Europe.

Agitated Nutsche Filter Dryer Filter plate lowering

March 9, 2024
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Filter plate hydraulic lowering of the Agitated Nutsche Filter Dryer DN1100 at the handover of the new machine to the customer.

This Filter Dryer has a diameter of the filtering plate 1100 mm and a total volume of 900 liters (cake volume 300 liters). Material of construction stainless steel AISI 316 L, ATEX execution.

Lab Ribbon Mixer Dryer for the Ghent University

December 20, 2023
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We have just delivered a laboratory conical ribbon mixer vacuum dryer with a fixed lid and the condenser on a stand to the University of Ghent in Belgium.

Specification of Equipment:

Surface in contact with the product made of stainless steel DIN WNr.4571/1.4404
Finished Ra <0.8 µm, incl. roughness measurement protocol
Heating jacket material stainless steel DIN WNr.4301, surface Ra <1.6 µm
Working temperature of the vessel 0 to + 300 °C
Working pressure of the vessel -1 to +1 barg
Total vessel volume approx. 4.3 L, working volume approx. 3 ltr
Spiral stirrer, stirrer shaft ø10 mm, for lab drive
O-ring flange seal of the container lid, Kalrez O-ring material
Lid mounted to the frame
Dismountable vessel without the bottom drain, could be adapted for discharging by overturning
Lid sockets:
- 1x KF 25 (DIN 28 403)
- 3x KF50 (DIN 28 403)
Magnetic drive 180 W, manually changeable rpm 20-60/min
Heating/cooling system connected to Dryer by insulated hoses Huber made
Condenser with tubes, 0.15m2, material 1.4404, condensate flow to the tank 1 ltr
Passport incl. material certificates

Mobile nutsche filter for the University of Bayreuth

December 19, 2023
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Our company has become a recognized partner for the supply of equipment to European R&D centers and university laboratories. One such example is the custom-made design, manufacture and delivery of a mobile nutsche filter DN300-25 L for the University of Bayreuth.

TECHNICAL SPECIFICATION

Working temperature 100 °C.
Operating pressure -1 / + 3 bar
Cylindrical vessel with domed base and domed hinged lid
Diameter of the cylindrical part of the filter body 300 mm, height of the cylindrical part 400 mm
Removable sieve with handles, perforated base with filter plate attachment
Total filter volume approx. 30 L
Filter surface area 0.04m²
Material of construction: stainless steel AISI 316
Inner surface roughness (in contact with product) Ra < 0.8 μm, including roughness measurement protocol
Outer surfaces brushed
Filter on 3 legs, with 3 swivel wheels with brakes

Height of the filter gap flange above the floor 600 mm
Design and manufacture according to PED 2014/68/EU

Other Lab Ribbon Mixer Dryer Visualization

December 12, 2023
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Visualisierung eines weiteren konischen 4-Liter-Labor-Bandmischtrockners für die Glovebox für einen Kunden in Belgien. Das System besteht aus dem Trockner, der Vakuumpumpe, dem Wärmetauscher und einem Kondensator auf einem gemeinsamen Rahmen.

Lab Ribbon Mixer Dryer Visualization

December 11, 2023
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Visualization of a 4 L Lab Conical Ribbon Mixer Dryer intended to the glovebox for the Ghent University in Belgium. The system consists of the dryer, the vacuum pump, the heat exchanger, and a condenser, on a common frame.

New Filter Dryer DN1100

November 21, 2023
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This Tuesday we handed over a new filter dryer to the customer. This one has a diameter of the filtering plate 1100 mm and a total volume of 900 liters (cake volume 300 liters). Material of construction stainless steel AISI 316 L, ATEX execution.

Nutsche filters for USA

July 28, 2023
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Two nutsche filters DN250-5L with ASME certification are ready to be shipped to Philadelphia / USA. Thanks to the company Polymer Reactor Technology GmbH for the excellent cooperation.

TECHNICAL DATA:

Static Nutsche Filters (NF) with manually removable lid
Operating temperature 32 – 302 °F (0 – 150 °C)
Operating pressure 0 – 100PSI (0 – 7 bar)
Design pressure 0 – 150PSI (0 – 10.5 bar)
Cylindrical vessel with domed bottom and domed lid
Diameter of the cylindrical part of the filter body 250 mm, height of the cylindrical part 200 mm
Diameter of the cylindrical part of the insert basket 220 mm, height of the cylindrical part 180 mm
Removable 5 L filter basket
Material in contact with the product AISI 316Ti stainless steel, other parts AISI 304
Internal surface roughness (in contact with product) Ra < 0.8 µm, including roughness measurement report
Outer surface unified by brushing
Filter on 3 legs, possible on mobile structure with 3 swivel wheels with brake
Design and manufacture according to ASME