Steven Levy Enterprises buys and sells new, unused, and used surplus screeners, separators and classifiers. Browse our inventory of used screeners, separators and classifiers available for purchase. Screeners are used to take granulated material and separating it into multiple grades by particle size. Separators are used to seperate production fluids into their constituent components such as oil, gas and water. Classifiers are an industrial machine which separates materials by a combination of size, shape, and density. Tell us what surplus screeners, separators and classifiers you have for sale or call us at 713-910-4337.