LEDEEN

Class [007]
Machinery Products

[ 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; accessories for pneumatic and hydraulic actuators, 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; hydraulic pumps of the rotary, reciprocating piston and single stroke plunger type