Double containment valve system

A control valve having a valve body with a fluid flow passage there through;

• a valve stem having a longitudinal axis, opposing ends, and finite length;
• said stem carrying a control member at one end;
• said stem and control member being moveably carried in said valve body, a valve mounting housing carried by said valve body and enclosing part of the length of said valve stem that is intermediate said opposing ends and spaced from said control member;
• said mounting housing having 1) a first bore adjacent said valve body, said first bore having a first cross-sectional width, 2) a medial bore having a second cross-sectional width that is larger than said first cross-sectional width, said medial bore having an end adjacent said first bore, and 3) a distal bore having a third cross-sectional width that is larger than said medial cross-sectional width, said distal bore having an end adjacent said medial bore;
• said medial bore carrying engagement means adjacent said distal bore;
• a first packing assembly in said medial bore and extending to said engagement means;
• a compression member engaging said engagement means and said first packing assembly;
• a locking member engaging said engagement means and said compression member;
• and a second packing assembly carried in said distal bore;
• said second packing assembly having a packing follower, said packing follower being live loaded by springs external to said housing.