What type of pneumatic solenoid valves would represent the valves in the schematic?
Specifically, the lower valves could be represented by a 5 port 4 way 2 position valve. This is because there is only one port with bidirectional flow for each side.
However, I'm not sure how to realize the upper valve system since there are 2 ports with bidirectional flow. Is there a way to realize this system with multi-port valves or does the upper system need to utilize direct acting (not pilot spool) valves?