Fuel cell block

The block (1) has an operating medium supply unit (3) supplying the block with an operating medium e.g. operation gas (2) such as hydrogen or oxygen. The operating medium supply unit includes an integrated valve assembly (4) provided with two valves that are integrated into connection elements. One of the valves is designed as a main valve such as ball valve (5). The other valve is designed as a bypass valve (6) such as electromagnetic actuatable valve, associated to the main valve. The connection elements are designed as flange plates.