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PressureGaugesPressureSwitchesitchesBranchesCoupersilHosesJonts34.57911.5141822.569691/43/81/23/41SwAccessoriescat-No.78E since2017Nominal diameterExternal diameterInternal diameterϕϕm3 lOsi13.817.321.727.23442.71-1/4SleeveMPaSLEEVE-6SLEEVE-9SLEEVE-1/4SLEEVE-3/870Wall thickness Standard length Pump connectable to the threaded end of a hosemm2 (Note)Manual pumps (Except the P-5 and P-7) 1.52.253.44.155.16.68.010.1P-5/SMP-30/40/MP-4/EMP-5/EMP-6/ON-2/5P-7/MP-10/MP-12/MP-12H/MP-15H/MP-17HMP-15MP-15 (Particularly if the cylinder speed has priority) MP-17MP-20MP-40After tightening Dimension h No. of rotations of the cap nut required (gap) Approx. 2 mm Approx. 3 mm for temporary tightening1-1/4 rotations 1-1/2 to 1-3/4 rotations STS:S type stud tee STL:L type stud teeET:Equal teeSteel pipe for pipingBite type tube jointSU:Stud union SL:Stud elbow EU:Equal unionEL:Equal elbowModel code structureModel code structureTightening torque35 to 50 N•m60 to 80 N•m100 to 120 N•m170 to 190 N•mNominal diameterApprox. weight0.7 kg/4 m1.1 kg/3 m2.6 kg/3 m4.0 kg/3 m6.3 kg/3 m10.0 kg/3 m15.4 kg/3 m24.4 kg/3 mCompatible pipe size6 / 9 / 1/43/8 / 1/2 / 3/41 / 1-1/46A:FEP-66B:FEP-69:FEP-91/4:FEP-1/43/8:FEP-3/8JointsSteel PipesMaximum operating pressureModelJoint type MPaFEP-6FEP-9FEP-1/4FEP-3/8FEP-1/2FEP-3/4FEP-1FEP-1-1/4Note. Only the FEP-6 has a standard length of 2 m and is sold in a set of 2 pieces. * Commercial pipe benders can be used for bending of up to a 3/8 pipe. For larger pipes, use equal elbows instead of bending. * The pipes have been flushed. After completion of piping, be sure to flush the pipe to remove chips, welding slugs, etc., from the inside of the pipe. * After completion of piping, secure the steel pipe with commercial clamp blocks.Bite Type Tube Joints● Equipped with a sleeve that bites the outer periphery of a pipe with a nominal di-Bite type tube joint70Welded Joint● An improper work procedure may cause a serious accident. Before tightening ● Select an appropriate size taking into account the discharge volume of the pump and the piping　length. If the size is incorrect, the predetermined cylinder speed may not be attained, and also　noise and heat from the hydraulic oil could result. ● When the overall piping length is extremely long using a two-stage electric pump, particularly if the　cylinder approach speed has priority, use an steel pipe one size larger in nominal diameter. ● If the hydraulic oil is equally branched by a branch, tee, or the like, pipes or hoses with a smaller　nominal diameter can be used. ● Every pipe has been flushed. ■Dimensionsameter of 3/8 or smaller so that the sleeve has sealing performance and prevents the pipe from coming off. ● Threading or welding the pipe is not necessary. ● For Riken hydraulic equipment, be sure to use Riken’s genuine joints and steel pipes. ■How to use bite type tube joints (1) After cutting the pipe, remove the burrs, clean the cut surface, and flush the pipe. (2) Use a joint as a dummy and secure it with a vice or the like. (3) Pass the pipe through the cap nut and then the sleeve properly, and lubricate it to prevent heat generation and galling. (4) Leave clearance of dimension “h” between the pipe end and the innermost face of the joint, and tighten the cap nut gently. (5) By tightening the cap nut, the rotation torque increases rapidly and the sleeve starts to bite the pipe, eliminating the looseness of the pipe. (6) From the above state, tighten the cap nut of FEP-6 and FEP-9 by 1-1/4 rotations and FEP-1/4 and FEP-3/8 by 1-1/4 to 1-3/4 rotations to complete temporary tightening. (7) Remove the pipe with the sleeve from the dummy joint, and check the biting condition of the sleeve. (8) Take the pipe to the work site and do the final tightening. For the tightening torques, see the table below. (9) After all piping work is complete, flush the pipe and conduct a pressure test. In the pressure test, apply low and high pressures in several stages to check oil leakage. After applying the maximum pressure a few times, tighten the cap nut to the specified torque. After starting the operation, inspect the pipe on a regular basis and tighten the nut additionally. Stop the pump and reduce the pressure before inspecting and tightening.ModelMaximum operating pressureFEP-6FEP-9FEP-1/4FEP-3/8180FEP-6SU-3/8