Abstract: There is disclosed a gate valve having a fabricated, box-like body in which the gate is movable, and hubs welded to and extending within opposite walls of the body to mount seats on their inner ends to engage the gate. Laterally disposed, generally "C"-shaped, rigid reinforcing flanges have inner edges which are spaced from but extend closely about the opposite side walls and adjacent ends of the front walls of the body on opposite sides of the valve body. One end edge of each flange is welded to one hub and the other end edge thereof is welded to the other hub, whereby the flange functions as an eccentrically loaded tension member. A conduit connects to and extends outwardly from the outer end of each hub to enable the valve to be connected in a line, and each such conduit is thinner than the hub to which it is connected.

Abstract: There is disclosed a valve having an expanded gate comprising a pair of ported segments each having "V"-shaped, oppositely facing inner surfaces which are yieldably urged into conformity with one another by a pair of leaf springs. Each leaf spring is disposed about a pin on one side of a first segment intermediate its ends, and has one of its ends anchored to the first segment, and the other end anchored to the second segment.

Abstract: There is disclosed a gate valve having a gate movable within an elongated, rectangular section of a pressure containing body, and a hoop-like reinforcing flange disposed about the body section near one end thereof and arranged perpendicularly to the length of the body. Welds secure the inner edges of the flange welded to only intermediate portions of the long front walls of the body section, and bolts are provided for drawing together all four sides of the reinforcing flange and a mounting flange on a bonnet assembly. A reinforcing means connects the unsecured portions of the reinforcing flange to the front walls of the body section in such a manner as to have relatively high rigidity with respect to forces perpendicular to the reinforcing flange and relatively low rigidity with respect to forces which result from relative movement between the body and flange in directions generally parallel to the reinforcing flange.