Chris Geoghooligan<p>…. Anyone know WTF is going on here? Pneumatically-actuated solenoid driving a quarter-turn spring-acting butterfly valve?</p><p>If it helps, the drawing is from 1988.<br><a href="https://toot.community/tags/engineering" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>engineering</span></a> <a href="https://toot.community/tags/help" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>help</span></a> <a href="https://toot.community/tags/P" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>P</span></a>&amp;ID <a href="https://toot.community/tags/PID" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>PID</span></a> <a href="https://toot.community/tags/piping" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>piping</span></a> <a href="https://toot.community/tags/drawing" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>drawing</span></a> <a href="https://toot.community/tags/diagram" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>diagram</span></a> <a href="https://toot.community/tags/valve" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>valve</span></a> <a href="https://toot.community/tags/valves" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>valves</span></a> <a href="https://toot.community/tags/actuators" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>actuators</span></a> <a href="https://toot.community/tags/pneumatics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>pneumatics</span></a> <a href="https://toot.community/tags/controlvalves" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>controlvalves</span></a></p>