The suction units consist of an air filter onto which are installed a rear flange to connect to the intake piping and a side manifold (connected to the outlet from the filter), duly flanged for installation on various types of Jurop pumps. The suction units described in this technical data sheet are designed to be installed in correspondence of the intake line (in the proximity of the suction device) of air decompressors. These suction units are designed to be connected directly to the vacuum pump through the flanged manifold. The suction units prevent foreign bodies (with dimensions greater than the degree of filtration of the filtering cartridge) from entering inside the pumping system.