SHUT-OFF VALVE The Fuji shut-off valve and piston design provide the benefit of stable shut-off and torque levels. The design ensures smooth movement of the piston which means oil pressure is transmitted precisely to the shut-off valve. In effect – both accuracy and consistency of the tightening torque is improved greatly. For low air pressure operations at 0.4-0.5 MPa (4-5 bars), low pressure models (-L) are provided with special design optimizing oil flow from the relief valve. Thanks to this design even low oil pressure can be transmitted exactly to the shut-off valve.

PLUNGER MECHANISM Plunger mechanism provides the benefit of improved torque accuracy. For control of low torque the oil pressure applied to the piston is maintained at a low level and it improves torque control. To ensure tight accuracy control of low torque, the plunger mechanism is utilized to deliver torque accurately. Oil leakage is prevented within the mechanism via a passage in the plunger which is designed to accommodate changes in oil pressure when the pulse is generated. Consequently, torque and tightening accuracy stability are maintained.

ACCUMULATOR MECHANISM The accumulator functions to compensate against the sudden rise of oil pressure when tightening a hard joint. Torque scatter and error are minimized. As the oil temperature increases during consecutive tightening, the accumulator takes in the expanded volume of oil to maintain a consistent oil volume in the pulse unit. This ensures high tightening torque accuracy.

ADVANCED PULSE UNIT DESIGN Advanced pulse unit design provides generation of high hydraulic pressure and reduction of oil deterioration speed during consecutive tightening. Oil deterioration and leakage from metal constructed pulse unit with high sealing technology become minimized level to ensure long service life. ERGONOMIC DESIGN Compared with conventional tools, weight is kept to a minimum. The grip handle size is optimized to provide enhanced level of operator comfort. This special grip also absorbs vibration more effectively. Furthermore, reduced noise and vibration levels are standard with FLT *3 series due to the optimized dimension.