Williams Patent Crusher & Pulverizer Co., Inc.

Air Classifiers



Gearless Mechanical Air Separators Designed to make separations of materials by particle size or shape, or of different specific gravities, these separators have been definitely proven the outstanding equipment of their type - in efficiency, capacity, design, and construction

  • No Gears Just one V-belt drive is used direct from motor to main assembly shaft. All gears with accompanying jack shafts and bearings are eliminated which adds up to big savings in lubrication, gear replacement and other maintenance.
  • Self-cleaning Air Seal (Patent No. 2,913,109) The area between the stationary and rotating elements has frequently been a source of trouble before the perfection of the Williams self-cleaning air seal.
  • The ventilator duct at the top of this seal permits air to be drawn through this space thereby keeping it clean of material which would otherwise accumulate and cause friction and wear.
  • Single Or Double Spinner Blades Some separations are best accomplished by the use of a second set of spinner blades that can be furnished when necessary.
  • Only Two Bearings Both are lubricated from outside. They are oversize non-friction type, sealed against entry of foreign material. Bearing arrangement is extremely simple; two oversize bearings are easier to align than any more complicated arrangement.


Large Feed Opening When feeding bulky material such as fibers, or in the feeding of a large volume of limestone or other relatively heavy material, the big feed opening permits unhindered entry of material into the separator.

Liners For Abrasive Materials When sold for the handling of abrasive materials, all areas subject to wear are protected by renewable abrasion-resistant liners.

Steeper Cones - Quicker Discharge Comparison of the Williams with any similar separator will show that the bottom cones of the Williams are much steeper. This design accelerates the discharge of all material from the separator and assures higher capacity.

Simultaneous Drying And Separating By the introduction of hot air, many materials can be dried and ground simultaneously. Hot materials may be cooled in the separator by the same method as drying, but with the use of cooled air.

Main Rotating Member Carried Between Bearings No overhang. The lower bearing is located at the extreme lower end of the shaft, and the upper bearing almost at the top. These bearings are spaced widely apart on the shaft to provide better support with no overhang.


Increases Capacity Of Grinding Units By operating grinding machinery in closed circuit with Williams Mechanical Air Separators, the finished material is removed from the circuit as fast as made, and the grinding unit is free to work on unground material.The grinding units are not cushioned by finished material, thereby avoiding over-grinding and greatly increasing mill capacity.

Positive Control Of Product Fineness A Williams Mechanical Air Separator is positive assurance of proper product fineness. Only material of satisfactory fineness is discharged as the fine fraction, and all oversize is returned for regrinding. This positive control is especially valuable when the wearing parts of the grinding unit become worn, in which case the product of the grinder alone tends to become coarser.


Superior To Screens For Fine Separations Williams builds both vibrating screens and air separators; recommendations are totally unbiased. Generally, any separation finer than 20 or 30 mesh can best be accomplished by air separation. The fineness delivered by air separation is constant and is not affected by breakage of delicate fine mesh screens. An air separator also eliminates the frequent replacement of screen wire. The capacity per square foot of fine screens is relatively low; large tonnages of fine material can only be economically separated by air.

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