Valve arrangement

The invention concerns a valve arrangement ( 1 ) with at least two valve modules ( 2, 4, 5 ), each having a valve element, whose position can be changed by means of an actuator ( 13, 13 a , 13 b), and to which a position sensor ( 19, 19 a , 19 b) is allocated, a line arrangement ( 24 ) being connected with the valve modules ( 2, 4, 5 ), through which control signals can be transmitted to the valve modules ( 2, 4, 5 ). It is endeavoured to increase the safety of such valve modules. For this purpose, at each valve module ( 2 to 5 ) the actuator ( 13 ) is provided with a control device ( 22, 22 a , 22 b), which is connected with the position sensor ( 19, 19 a , 19 b) and evaluates control signals for the valve module ( 2 to 5 ) concerned, that at least the control device ( 22 b) of a first valve module ( 5 ) additionally evaluates the control signals for another, second valve module ( 4 ), and that this control device ( 22 b) receives signals from the position sensor ( 19 a) of the second valve module ( 4 ).