The Bray McCannalok Significant-Overall Performance Butterfly Valve overcomes superior-strain use with its patented dual-eccentric (double offset) stem and disc structure. By offsetting the stem, the McCannalok produces a "camming" motion that lifts the disc far from the seat instantly upon opening. Butterfly valves prove useful when specific conclusions should be https://www.ysmeter.net/self-operated-valve-series/