Patent Number: 041683943
Section: abstract

An electric penetration assembly for passing electrical conductors through the wall of a pressure vessel has at least one hermetically sealed electric feed-through conductor surrounded by an insulator. The insulator is symmetrical about an axis parallel with the conductors and is impervious with a pervious means disposed between the ends. The insulator is shaped wherein an external conical section is disposed between two external cylindrical sections and wherein the pervious means communicates with the conical section. The assembly is inserted into a header plate having at least one transverse aperture formed with a female conical section disposed between two female cylindrical sections. In the female conical sections are formed two axially spaced grooves for accepting O-ring type gaskets and the plate has at least one capillary bore formed therein which communicates with the conical section and with one face of the plate. This one face seals against a flange of a penetration nozzle of the vessel, with therebetween a gasket having interconnected double circumferential indentations or grooves. The bores in the plate communicate with these double indentations and with a pressure gauge so that any pressure therein can be monitored. A suitable clamping ring secures to the exterior surface of the plate to urge the assembly into the respective aperture and against the O-rings.