What pump system should I use for a resealable flow cell or OOC chips?

Both OOC chips and resealable flow cells are intended for low pressure applications, up to 300-400mbar. Because the channels are large not that much pressure is required to create flow. It's important for that reason that the pump system can limit the amount of pressure that will be applied. We would recommend a pressure-based system.
However, it should be possible to use a syringe pump when a pressure relief valve is applied for each liquid path. 

An example of such a valve is this.