The closing element is generally a disc or ellipse which turns about an angular shaft. Linear hydraulic valve actuators -- Linear actuators move linear valves such as gate, globe, diaphragm, and pinch ...

ISA96.06 – The standard provides basic requirements for electro-hydraulic part-turn and linear actuators both double acting and single acting, used for on-off/isolating and regulating/positioning ...

Linear Motion Valve Linear motion valves (linear ... Manual Override of Power Actuator? A handwheel or lever (fixed or declutchable) or hydraulic hand pump can be used to manually override the power ...