This invention relates to two-piece gate valves and, in particular, a two-piece gate valve having the gate pieces operatively spaced by a spacer ring.
Double disc gates have been proposed for gate valves because of certain inherent functional and manufacturing advantages. Such constructions, in view of the larger freedom of movement of the independent discs, can conform to larger manufacturing variations in the discs and the valve seats while, at the same time, provide complete sealing despite distortion of the seats due to differential heating and cooling rates and system stresses.