Duplex engineering works supplies highly efficient circular gyratory vibroscreens with adjustable multiplane three component mechanical vibration. The heart of these vibroscreen gyroscreen is a robust vibrator motor rigidly mounted on a circular vibrating table on rugged springs which operates in a long trouble free manner. A number of interchangeable spacing frames with discharge putlets alongwith tension rings fitted with screen cloth can be mounted one on top of the other on the vibrating table with the help of clamp rings. Duplex gyroscreens have the technical advantage for handling upto five different screens one on the top of other with feed trays in between to give six precise sized fractions in a single screening operation. The company also provides special design with seven screens for grading.