Add more ICs

Is it possible to implement the use of more PCF8574 ICs?

I am assembling equipment to control 12 fermenters using PT100, I needed to expand more IOs that will be responsible for activating the valves of the fermenters, which will be 2 per fermenter (heating/cooling). I intend to leave the RASP GPIOS. only for the CS pins of the MAX modules.