Electropneumatic valve assembly

An electropneumatic valve group (1), comprising:

• an electropneumatic pilot stage with at least one pilot valve (P1, P2) and
• a pneumatic power stage, activated by the pilot stage, with at least two power valves (L1a, L1b, L2a, L2b),
• wherein each pilot valve (P1, P2) switches at least two power valves (L1a, L1b;
• L2a, L2b) coupled pneumatically with the pilot valve (P1, P2) and
• wherein the valve group (1) is provided with a housing (2) having an electrical signal input (7), a compressed-air port (18), at least one vent port (20) and at least one working outlet (19, 21),
• wherein the housing (2) has a layered structure with at least one pilot-stage housing (3) and at least one power-stage housing (4) connected thereto along a substantially plane separating face (T),
• wherein at least one sealing element (D1, D2), which encloses a control-pressure region (S1, S2) disposed between the at least one pilot-stage housing (3) and the at least one power-stage housing (4), is received or formed between the at least one pilot-stage housing (3) and the at least one power-stage housing (4), wherein the control-pressure region (S1, S2) is provided with two activation regions (A1a, A1b;
• A2a, A2b) for the at least two power valves (L1a, L1b;
• L2a, L2b) and one duct-like connection (K1;
• K2) with a defined flow cross section between the two activation regions (A1a, A1b;
• A2a, A2b), wherein an outlet (14, 15) of the associated pilot valve (P1, P2) provided in the pilot-stage housing (3) discharges into the control-pressure region (S1, S2),
• wherein the at least one sealing element (D1, D2) is constructed as a closed cord seal, which laterally encircles the control-pressure region (S1, S2),
• the surface of the pilot-stage housing (3) turned toward the power-stage housing (4) has grooves (35, 36) that receive the cord seal, and
• elevations (38, 38′) are formed on the surface of the pilot-stage housing (3) turned toward the power-stage housing (4), between the two grooves (35, 36) adjacent to one another.