This International Standard specifies a coding scheme used for communication purposes. Defines the operating functions of valves used in various sizes with mounting surfaces specified in JIS B 8375-1 and JIS B 8375-2. This coding system cannot be overused directly in products because it does not describe many characteristics that affect performance (e.g., pressure ratings, electrical characteristics, flow ratings, all geometric dimensions, etc.). There isn't.
JIS B 8375-3:2000 history
2007JIS B 8375-1:2007 Pneumatic fluid power -- Five-port directional control valves -- Part 1: Mounting interface surfaces without electrical connector
2000JIS B 8375-1:2000 Pneumatic fluid power -- Five-port directional control valves -- Part 1: Mounting interface surface without electrical connector
1993JIS B 8375:1993 Pneumatic system -- 4-port and 5-port solenoid operated valves