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AccessoriesillOsi PressureGaugesPressureSwitchesitchesBranchesCoupersHosesJontsSwCoupler Information (References)Coupler Information (References)■ Example of how to remove air from a　 single-acting cylinder ■ S type and ROC type Pressure loss characteristics against flow ratesPump model ■ Example of how to remove air from a double-acting cylinder When one pump operates one cylinder All single-acting cylinders, 350 kN or smaller double-acting cylinders,500 kN or smaller center hole cylinders 500 to 2000 kN double-acting cylinders, 700 kN or larger center hole cylinders Use S-3 couplers if the cylinder speed has priority. Used with an cylinder with Rc 3/8 threads particularly for reducing pressure loss. An S-6R or S-6CR model coupler is attached to a cylinder. An S-8R or S-8CR model coupler is attached to a cylinder. No.79E since2025CylinderCouplers● It is dangerous to connect or disconnect the couplers while pressure is applied. Doing so may allow compressed oil to flow out,　causing injury.● Do not use S-1, S-2, or ROC-13 series couplers in a hydraulic circuit in which a shock is caused by large pressure fluctuation due to　blanking, punching, or the like.Otherwise, the equipment may be damaged. If the damaged parts are circulated in the hydraulic circuit,　other equipment may be damaged. ● Select couplers that are compatible with the discharge volumes of individual pumps. If the coupler size is smaller than the outlet port of the　pump, the predetermined cylinder speed may not be attained, and also noise and heat from the hydraulic oil could result.● Securely and completely connect the couplers. Not doing so could cause pressure not to rise, the hydraulic oil not to flow, or other problems. ● If a cylinder that works normally with S-1, S-2, S-5, S-6C, or S-8C series couplers stops suddenly, the most likely cause is looseness　(a gap) between the couplers. Tighten the couplers again using a tool if a gap exists.● If the pressure fluctuates often or vibration is transmitted to the couplers, regularly check the looseness of the cap nut.● A duster cap is included with a coupler. Attach the cap to the coupler after use to prevent dust.174● The combinations shown below are just examples. They may vary depending on conditions such as the piping length and the use of a hose with couplers at both ends. ModelVC-70-R3/RC3S-1H/ROS-1H/RManual pumps, air hydraulic pumps,1.5 kW or smaller electric pumps S-23H/24H/24RMP-12/MP-15VC-70-R4/RC4S-3MP-15S-52.2 kW or smaller electric pumps S-6 / S-6CMP-17S-8 / S-8CMP-20