Each blow-off valve includes a valve body with a first movable wall defining a portion of the liquid fluid passage therein and a second movable wall defining a portion of the suction fluid passage therein. The fuel cell system can include at least one fuel cell array of at least two fuel cells, and at least one load for performing load function. In this manner, the quality of the microreplicated product can be improved. The retainer is a resiliently flexible clip or clasp, such as a binder clip.