Valve

A valve comprising:

• a housing having fluid connections;
• a cartridge valve body mounted in said housing and having a longitudinal axis;
• a securing device fixing said valve body in said housing, said securing device having a blocking element being a separate component part relative to and located between said housing and said valve body, said blocking element having blocking surfaces movable relative to said longitudinal axis between an assembly position allowing said valve body to be inserted into said housing and a blocking position in which said blocking surfaces secure said valve body in an installation position in said valve body;
• said blocking element being an annular body, said annular body being expandable by elastic deformation for installation of said valve body in said housing into the assembly position and having shape recovery into the blocking position when the installation position is reached such that said blocking surfaces engage retaining surfaces on said valve body, said annular body being in an installation space in said housing, said installation space having a radial depth relative to said longitudinal axis allowing radial expansion of said annular body in the assembly position and being axially delimited on a side facing an installation opening of said housing by a first housing angular surface, said first housing angular surface retaining said annular body against movement toward the installation opening;
• and
• a third body angular surface on said valve body being in front of a valve body section with a largest external diameter of said valve body, said third body angular surface forming an insertion chamfer that allows expansion of said annular body radially into said installation space during installation of said valve body in said housing, said installation space having a radial dimension between said valve body section with the largest external diameter and a radial outer end of said installation space greater than a cross-sectional diameter of said annular body to allow radial expansion of said annular body during the installation and removal of said valve body relative to said housing, said angular surfaces being non-perpendicular to said longitudinal axis.