LEDEEN

crank arm actuators for the automation of small size valves including double acting and spring return types, scotch yoke actuators for the automation of medium and large-size valves including double-acting and spring return types, gas-over-oil actuators including control cabinet and hand station and operable by gas carried in the pipeline, hydraulic high pressure actuators operated by hydraulic transmission oil or by high pressure water, hydraulic actuators with control cabinets including pressure intensifier, pneumatic positioner and proportional/integral regulator for throttling large size ball valves to regulate down stream pressure in a forty inch pipeline, the power being supplied by gas carried in the pipeline, gas-over-oil linear actuators for the automation of large gate valves fitted with detents in order to hold the slab in open position, pneumatic linear actuators for the automation of small and medium gate and globe valves fitted with manual hand wheel for emergency operation; and accessories; namely, pneumatic/hydraulic pressure intensifiers used for automation of large valves when the pressure supply is very low, differential pressure detectors used in fail/safe or emergency shut down circuits and as line-break detectors, twin 3/2 solenoid valve manifolds mounted, fitted with levers for manual operation, air receivers manufactured to ASME Standards, complete with relief valve and accessories, electro-hydraulic central power units complete with pushbutton station and bladder type accumulator, micro-switch box with an explosion proof enclosure suitable for sub-sea surface down to four hundred meters, hand-station for manual operation consisting of a hand-pump, a spring centered directional valve, oil sump, flow control valves and automatic override, all manifold mounted