Processing system conexu00e7o an apparatus hidru00c1ulico a tubulau00c7u00e7o plastic material the system comprises a tubular connection device (d), which is equipped with a nozzle end (20), and a cylindrical surface (21) to be connected to a pipe (T), and a nozzle O.D. Emo opposite (30), and a cylindrical surface (31).Having a circumferential recess (32) and to be fitted to a cylindrical sealing surface (12) of a tubular nozzle (11) of the body (10) of the hydraulic apparatus (a). A retaining ring (50) is housed in one of the parts of the circumferential recess (32) and the circumferential groove (13) of the cylindrical sealing surface (12) and fitted and locked on the other of said parts.One of the parts of the hydraulic apparatus (a) and a tubular connecting device (d) is provided with a cutout (R), and the circumferential recess (32) or the circumferential channel (13), with the outside of both sides (a, d) are coupled between themselves, and the ring. The check valve (50) inco A pair of flaps rpora handle (52) which are projected out of the part through the cut-out (R)
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