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　Hydraulic Valves＞Direction-Control Valves　Accessories＞CouplersHydraulic Pumps > Electric Pumps　Hydraulic Valves＞Direction-Control ValvesPage80･81Page118Page116Page173● The newly developed ESW-4B center bypass type 4-way solenoid　 direction-control valve is mounted on the EMP-5 and EMP-6　 electric pumps for double acting cylinders.● The hydraulic oil returns from the pump to the oil tank　 at the neutral position.● Equipped with a double safety mechanism using a safety valve　 and pressure switch to prevent an overload.● This is a new series of spool type 4-way solenoid direction-　 control valve that is smaller and lighter than the previous　 SOW-R-4 series.● The pressure loss characteristics of the solenoid valve have　 been greatly improved through a major review and redesign　 of the valve body, and the valve's weight has been successfully　 reduced by approximately 30%.● Do not apply pressure for 1 minute or longer to prevent sticking　 of the spool. ● Center bypass 4-way 3-posisions type is newly added to the　 E series direction-control valves.● The hydraulic oil returns from the pump to the oil tank at the 　neutral position.● Do not apply pressure for 1 minute or longer to prevent sticking　 of the spool. ● Self-sealing type that prevents oil leakage.● When the couplers are stored in the disconnect condition, please use the attached steel duster caps.No.79E since2025RIKEN KIKI CO., LTD2EMP-5SB / EMP-6SB SeriesFor double-acting cylinders (solenoid operated direction valve)SOL(W)-44 Series4-Way Spool-Type Solenoid Operated Direction-Control ValvesESW-4B SeriesCenter bypass type 4-way 3-positions solenoid operateddirection-control valveS-6C･S-8CSelf-sealing type