Profile: Blair Engineering manufactures grain cleaning, grading, and handling equipment. We stock a wide range of agricultural machinery. Our two, three, and four layer sieve machines with single or double aspiration can process all types of grains. Our small hand operated cleaning units comprise of electrically driven machines with single stage aspiration. The initial operation is to suck out the dust, chaff, shriveled, and light grains. Most have a scalper screen, and two main screens. The top screen removes large unwanted particles of short straws & unthreshed heads, and the lower screen allows small weed seeds to fall through and leaves the finished cleaned product.