This Stolz Turbo Sifter BCMT 1250 is a laboratory-grade rotating sieve machine — sometimes referred to as a centrifugal sifter or turbo screener — used for the separation, classification, and screening of bulk materials by particle size. Stolz is a French manufacturer with a long-standing focus on process equipment for the animal feed, grain, and agri-food industries, and their turbo sifter range is designed for high-capacity, continuous-duty screening applications where consistent particle separation is required.
This particular unit, carrying serial reference 24-1597, was built in 2024 and is offered used from its location in Barneveld, Netherlands. It is constructed in mild steel and carries CE marking. The machine has a floor footprint of 3.2 × 1.6 metres and stands 2.2 metres tall overall, making it a substantial but self-contained unit suitable for industrial or pilot-scale processing environments.
At the heart of the machine is a rotating cylindrical sieve cage measuring 1,250 mm in diameter and 1,900 mm in length, providing a total sieve area of 4.5 m². The sieve perforation is 3 mm throughout. The sieve rotates at a low speed of 6.3 rpm, driven by a dedicated gear-motor rated at 1.5 kW, while an internal beater assembly rotates at a considerably higher 240 rpm, powered by a 45 kW motor. This combination of slow sieve rotation and high-speed beating action is characteristic of the turbo sifter design, ensuring efficient material throughput and preventing blinding of the screen surface. Material is fed through a 350 × 350 mm inlet opening.
Sieve cleaning is handled by a compressed-air blowing system operating at 6 bar with an air flow of 1,670 NL/min, and the glands are air-purged to protect the bearings and seals from product contamination. The machine is fitted with an inspection hatch for access during operation or maintenance. Beneath each turbo sifter unit, extraction screws measuring 550 mm in diameter and 3,000 mm in length handle the discharge of separated material. The sieve cage is included with the machine.
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