Patent ID: 9140397
Filing Date: 2015-09-22
Classification: E04C,F16B,F16K,F16L,F16M

Abstract:
1. A gate valve and a substantially circular wear ring for insertion into the gate valve comprising a gate valve having a body, a substantially circular wear ring comprising: a high-hardness metal ring, the high hardness metal ring having an exterior surface configured to engage the body of the gate valve; a polymeric overlay covering at least a majority of the exterior surface of the metal ring, the polymeric overlay forming the final dimensional shape of the wear ring and configured to fit an interior surface of the body of the gate valve; wherein the metal ring has a first portion with a first circumference, and a second portion offset from the first portion so as to have a larger circumference, each of the first and second portions being overlain with the polymeric overlay; and wherein the offset between the first portion and second portion of the circular wear ring is at least partially exposed.