The multistage hydraulic bolt tensioners, CTP-M series, are characterized by having a central tie rod on which two load cells act, this construction type allows to double the load capacity while maintaining the outer diameter of the cell identical. The result obtained is extremely compact with the same load supplied. The FPT multistage tensioners are suitable for all applications in which there are reduced radial dimensions available. This type of tensioner is also available in the version with a gear nut rotation mechanism to accelerate tensioning operations for fast operation, when time is a key factor. Furthermore, there is the possibility of shaping the bridge so as to best adapt to the space available between the nut and the nut.
FPT realizes multistage hydraulic bolt tensioners to customer specifications by carrying out a preliminary study of the existing dimensions and thus offering the most suitable solution. Tensioners are used instead of hydraulic wrenches and are used for controlled tightening of nuts on stud bolts in the assembly of marine engines, large valves, compressors, pumps, presses, large machine tools and turbines. I can be designed to adapt to the main types of flanges: ANSI B16.5 – ANSI B16.47 – BS3293 – AWWA – MSS-SP44 – API-6A – API-17D – UNI EN 1092-1, including Norsok flanges, Vector, Slip on, Weld Neck and many others.
All the components are made with high strength steels and have a special treatment to ensure high resistance to corrosion and high resistance to wear during screwing operations.
FPT is specialized in the engineering and manufacturing of custom made multi stage hydraulic bolt tensioners up to 2500 bar. The reference markets increasingly require hydraulic tensioners made to customer specifications so as to be able to operate in the required dimensions. FPT follows the customer from the study of the geometries to the 3D project up to the production of the required tensioners. It also takes care of following the customer in the development of the hydraulic circuit by supplying the electric or air control units, the lever pumps and all the components suitable for operating the system, with pressures starting from 1600 bar, 2800 bar, 3000 bar. The hydraulic tensioners can be single-acting with spring return, with air return, compact, suitable for the wind sector, with threaded insert, underwater subsea tensioners, with bridges or special geometries in order to adapt to every single need.