Replacing the solenoid valve on Fanuc LR Mate 200i

Hi, so i have a robot FANUC LR Mate 200i which is very old and i need to use the RO's for grippers. After opening the panels and spotting the module with the solenoids, they are indeed wired and on/off when i activate them on the I/O - ROBOT page in the teach pendant.

The problem is that whether RO1,RO2,RO3,RO4 are on/off, only the same output B on the valves are active and they're always on.

i'm assuming its the valves that don't work anymore since i tried cleaning them and the problem still persists.

I want to know if i can replace the solenoid valves with others solenoid valves that we have here, assuming the originals are powered 24VDC or has any one dealt with something similar or any other suggestion ?

Thank you.

Thread resolved, the connector for the valve which is a 3 wire connector similar to a PC fan connector. The red wire is your 24VDC and each other wire is the negative depending on the RO using. We used a solenoid double valve as replacement and it works.