This Waldner Hermann machine is a blender and mixer — sometimes referred to as a stirring vessel or mixing tank — designed for the controlled blending and agitation of liquid or semi-liquid products in industrial processing applications. Waldner is a well-established German manufacturer known for producing hygienic processing and filling equipment for the food, dairy, beverage, and pharmaceutical industries, and this unit reflects that heritage in its materials and construction.
Built in 1994 and offered in used condition from Barneveld in the Netherlands, this is a single closed stirring vessel with a capacity of 568 litres. The vessel measures 800 mm in diameter by 900 mm in height, with a dished bottom and a dished top, giving it the rounded geometry typical of sanitary pressure vessels. The interior is polished, and the vessel is fabricated from stainless steel grade L), a molybdenum-bearing alloy selected for its corrosion resistance and suitability for food-grade and pharmaceutical contact applications.
The vessel operates at a working pressure of 1 bar, with its jacket rated to a higher working pressure of 2.5 bar. The jacket itself has a volume of 60 litres and allows for temperature-controlled processing, with a maximum operating temperature of 90 degrees Celsius. Agitation is provided by a propeller-type stirrer manufactured by Ekato, model EM-040, a specialist German brand in industrial mixing technology. The mixing shaft runs at two selectable speeds — 498 or 975 RPM — driven by a motor rated at 0.55/0.88 kW operating on a 400-volt supply.
Access to the vessel interior is via a manhole of 250 mm diameter. The top of the vessel is fitted with a variety of connections: three ports of 35 mm diameter, three of 45 mm diameter, and one of 60 mm diameter, providing flexibility for inlets, instrumentation, and additional process connections. The bottom outlet is 50 mm in diameter. The vessel is also equipped with three CIP (clean-in-place) nozzles, enabling in-situ cleaning without disassembly — a key feature in hygienic processing environments.
The overall footprint of the machine is 1.6 by 1.6 metres, with a total installed height of 2.4 metres. The unit carries internal reference number W-3188 and is located in Barneveld, the Netherlands.
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