Rotary Sifters

Rotary Sifters from Gilson Company are updated and improved versions of the classic rotary sifters widely used in construction materials labs for decades. They incorporate advanced design and materials for more efficient and quieter operation without sacrificing accuracy.

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These units are ideal for the separation of granular materials from No. 4 to No. 635 (4.75mm to 20µm) particle size. Sieve stacks from 6 12in full height to 20 8in half-height sieves plus pan are placed inside the cabinet, which is tilted back for operation using a convenient ergonomic side knob. No clamping is required, and the sifting operation is quiet and dust-free in the totally enclosed cabinet.

Rubber-covered rollers rotate the sieves while mechanical tappers assist particle passage through the sieve. A digital countdown timer with large, bright LED display controls operation up to 99 minutes 59 seconds and a pause feature that allows the operation to be temporarily suspended. The painted medium-density fiberboard cabinet is mounted on a heavy powder-coated steel frame. Models are available to operate on 115V/60Hz or 230V/50Hz power supply.

View our complete line of Sieve Shakers.

• Rotary Sifter is the basic model and includes all the advantages of quiet and efficient operation from the newest design. Accuracy and repeatability match older-style models and the design is accepted by many state DOTs.
• Silent Sifters^® keeps all the design and operational features of the basic model while significantly reducing noise levels during test cycles. Tests indicate that noise is 7 to 10dB lower than other designs with the Silent Sifter^®, and 16 to 18dB quieter with the Silent Sifter^® II.