Abstract: A valve modular system, comprising individual block components (1 to 4), each of which has a plurality of emerging connection points on at least one part of the free end faces thereof, for the purpose of holding connection components, such as insert valves (29, 35), pressure balances, nozzle or screen inserts (43), fluid lines, blind plugs (13, 15), pressure and temperature displays, hydraulic accumulators (9) and comparable fluid-influencing or fluid-evaluating or fluid-storing components, and which abut each other with the adjacent end faces (11) thereof in a longitudinal direction, in pairs, to form a longitudinal linkage and in this respect are connected at least partially to each other in a fluid-guiding manner, is characterised in that transversely to the longitudinal linkage at least one further block component (45, 49, 51, 59) is placed on at least one of the other block components (1 to 4) to form a vertical linkage in a fluid-guiding manner.