Female quick coupling fitting element for pipes

摘要

Disclosed is a female element for a pipe coupling fitting. The female element includes a hollow internal body having an end with fastening means provided on one of two pipes to be joined; a hollow external body coaxial with the internal body and having an end which axially protrudes with respect to another end of the internal body opposite to that provided with fastening means. The female element includes a rigid central stem coaxially supported within the internal body by a perforated base. The stem widens near the protruding end of the external body. The female element also includes an axially sliding sealing bush coaxially arranged about the stem. The bush is elastically stressed and is engagable with the widened end of the stem to prevent passage of fluid within the female element. The female element further includes a cleaning bush coaxially arranged about the sealing bush and axially stressed in position so as to prevent the entrance of dirt about the sealing bush, and a lock sleeve arranged about the protruding end of the external body. The female element is engageable with a complementary end of a male element of the pipe coupling fitting to ensure the stable union of the male and female elements of the pipe coupling fitting. The stem is fixed to the base by means of at least one half bush radially fitted and axially locked in corresponding seats of the stem and base.