Hydro pneumatic actuators

Hydro pneumatic actuators are automatic devices, operated with air or process gas, and, in turn, pressurize oil-powering actuators. They are available for low (250-500 psi) and high (600-3000 psi) pressure. These actuators driven by a gas, pushing a liquid, industrial hydraulic oil and biodegradable oil, and are used for the automation of gate, ball, plug, butterfly or damper valves.

Actuation mechanisms include symmetric or canted scotch yoke, pinion and rack, vein and piston type for lineal valves. In order to operate, these actuators depend on instruments and/or fixtures, such as solenoids, limit switches, filter, regulator, manometer, high and/or low pressure pilots, electric switches, bypass valves, maintenance valves, partial test devices, eutectic devices, storage tanks, nitrogen banks, local operation button panel, remote operation button panel, controllers, PLC, communication protocols, fire retardant protection, among others.

Operation times range from medium to as fast as 1 sec/inch rate, or less. They are equipped by a manual hydraulic pump, and are ideal for pipelines carrying natural or sour gases, or nitrogen, as well as liquids that cannot be used as drivers. Hydro pneumatic actuators are ideal for cut valves or pipelines sectioning.