This standard specifies the valves (hereinafter referred to as "valps"), which are spool-type 4-port switching valves operated by solenoid, that are attached to sub-plates or directly to machines via gaskets, and used in the hydraulic systems of various machines. However, this does not apply to items used in special items such as aircraft.
JIS B 8355:1997 history
2009JIS B 8355:2009 Hydraulic fluid power -- Sub-plate type solenoid operated four-port directional control valves
1997JIS B 8355:1997 Hydraulic fluid power -- Subplate type solenoid operated four-port valves