HRT TENSIONING SYSTEM |
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ADDITIONAL PRODUCT INFORMATION
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- High Temperature Capability.
- High Load Capacity.
- Minimum Footprint Required.
- Easily Retrofitable.
- Simultaneous Tensioning Capability.
- Hydraulics Separate From Nut.
- Stud Extension Not Required.
- Patented design.
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The Riverhawk HRT Tensioning System is suitable for high temperatures applications and is retrofitable to existing installation requirements. High load capacity is achieved by virtue of placing the hydraulic cylinder above the stud and nut maximizing the hydraulic working area.
No longer of concern are design limiting considerations such as temperature limiting seals and lubricants, coatings, and coefficient of friction due to torquing.
In operation, hydraulic pressure is introduced via a port in the cylinder. The reactive force thus generated is transmitted through the cylinder and, in turn, through the nut to pull on the stud. In this system, a circle of axial ports pass through the nut. Contained within these ports is a series of rods which transmit force from the bottom of the piston through a common washer to the flange face. When the stud is tensioned to a predetermined shank stress, a retaining ring threaded on the outside diameter of the nut is spun down into contact with the flange. The retaining ring serves to maintain the separating force between the nut and flange. The load cell portion of the system including the tensioner piston, tensioner cylinder and rods is removed after tensioning is complete. This eliminates temperature limitations that seal materials and oil would impose if they were to remain in the assembly during service as is the case in other hydraulic nut configurations.
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