Valve
assembly (10) comprising a one-piece first housing part (30) with a first and a second flat contact surface (31; 32), wherein the first and the second contact surfaces (31; 32) are arranged parallel to each other at a distance from each other by a disk width (33), pointing away from each other and oriented perpendicular to a
transverse axis (12), wherein a main valve (70) is linearly movably received in the first housing part (30) parallel to a longitudinal axis (11), the longitudinal axis (11) being oriented perpendicular to the
transverse axis (12), wherein the first housing part (30) has two first, two second, one third and one fourth connection point (21; 22; 23; 24), wherein the first to fourth connection points (21; 22; 23; 24) are fluidically connectable to each other depending on the position of the main valve (70), wherein the first and the second connection points (21; 22) are each two mouth openings (35;36) are formed, which are arranged parallel to the
transverse axis (12) in alignment in the first and second contact surfaces (31; 32), wherein a quick-
coupling device (140) is received in the first housing part (30) at the third and fourth connection points (23; 24), wherein the quick-
coupling devices (140) each have a separate
coupling bushing (141) which is movable parallel to a
vertical axis (13), wherein the
vertical axis (13) is aligned perpendicular to the longitudinal and transverse axes (11; 12), wherein the coupling bushings (141) are located between the first and second contact surfaces (31;32) are arranged, characterized in that the first housing part (30) has at least one actuation chamber (37) extending parallel to the longitudinal axis (11), in which at least one actuation axis (143) is rotatably received, wherein the at least one actuation axis (143) is each provided with at least one actuation
cam (144), wherein both coupling bushings (141) can be brought into contact with an associated actuation
cam (144), wherein the at least one actuation chamber (37) is arranged off-center between the first and the second contact surfaces (31; 32) in the direction of the transverse axis (12) to the first contact surface (31).