Our Detension Jacks HRJ in special edition for Prestressing lines are made in simple or double effect with max. capacity from 350 to 10.000kN and with useful stroke from 12 to 100 cm; all jacks has extra safety stroke of 5cm; they are manufactured in Mannesman pipe without welding (Fe 510 certified), bottom with strong thickness, plated and ground stem; gaskets for high pressures, guide rings in synthetic material, external scraper ring, eyebolt to lift, distance rings with inner rubber surface and blockage screws for manual movement; at request the spacer rings with centralised hydraulic system are available for safe movement. Jacks can be equipped with special safety blockage valves with piloted control, to guarantee the immediate stop in case of breakage of the feeding pipes.
Max. pressure 360bar. All the jacks with double effect are equipped with special safety blockage valves with piloted control, fixed with flange, to guarantee the immediate stop in case of breakage of the feeding pipes; the same valves are also available as an option for single-acting cylinders.
The double-acting jacks can be used with the SuperSeleCT Sincro4TP System.