Profile: Douce Hydro, Inc. designs and manufactures hydraulic cylinders. We offer a wide range of small, medium, heavy-duty, large cylinders and other parts such as standard hydraulic cylinders, custom designed hydraulic cylinders, piston accumulators, special machining, spare parts, seals kits, cylinders with rod measuring systems, prefill valves hydraulic cylinders, very low friction hydraulic cylinders, self locking rod systems on hydraulic cylinders, pressure intensifiers, rotary cylinders/rotary vane actuators/rack & pinion cylinders and swivel joints/rotary manifolds.