A device, with - a valve arrangement configured to control the flow of a fluid through a fluid channel, wherein the valve arrangement is designed as an opener or a closer; and - a pressurizing device connected in terms of flow with the fluid channel, which can be used to pressurize the fluid in the fluid channel; characterized by the valve arrangement, comprising: - a hose made of a flexible material, in which a section of a fluid channel is formed; - a valve component (1; 40; 50; 60; 110) allocated to the hose; - a cantilever arm formed on the valve component (1; 40; 50; 60; 110), wherein the cantilever arm is designed so that it can be reversibly displaced against a restoring force at least partially provided by the cantilever arm itself; - a crimping element (10; 41, 51; 62), which is arranged on a distal end of the cantilever arm for mounting the cantilever arm on a valve component (1; 40; 50; 60; 110), wherein the crimping element (10; 41, 51; 62) can be displaced by means of an actuator (11; 44, 45; 54, 55) against the restoring force on the cantilever arm , and wherein the crimping element (10; 41, 51; 62) can be pressed against an outer surface of the hose to control the flow of a fluid through the fluid channel up to closing of the fluid channel; and - the actuator (11; 44, 45; 54, 55) allocated to the crimping element (10; 41, 51; 62), by means of which the crimping element (10; 41; 51; 62) is displaceable into various regulating positions, wherein the pressure of the crimping element (10; 41; 51; 62) on the outer surface of the hose , and thereby the flow through the fluid channel is regulatable. - a valve arrangement configured to control the flow of a fluid through a fluid channel, wherein the valve arrangement is designed as an opener or a closer; and - a pressurizing device connected in terms of flow with the fluid channel, which can be used to pressurize the fluid in the fluid channel; - a hose made of a flexible material, in which a section of a fluid channel is formed; - a valve component (1; 40; 50; 60; 110) allocated to the hose; - a cantilever arm formed on the valve component (1; 40; 50; 60; 110), wherein the cantilever arm is designed so that it can be reversibly displaced against a restoring force at least partially provided by the cantilever arm itself; - a crimping element (10; 41, 51; 62), which is arranged on a distal end of the cantilever arm for mounting the cantilever arm on a valve component (1; 40; 50; 60; 110), wherein the crimping element (10; 41, 51; 62) can be displaced by means of an actuator (11; 44, 45; 54, 55) against the restoring force on the cantilever arm , and wherein the crimping element (10; 41, 51; 62) can be pressed against an outer surface of the hose to control the flow of a fluid through the fluid channel up to closing of the fluid channel; and - the actuator (11; 44, 45; 54, 55) allocated to the crimping element (10; 41, 51; 62), by means of which the crimping element (10; 41; 51; 62) is displaceable into various regulating positions, wherein the pressure of the crimping element (10; 41; 51; 62) on the outer surface of the hose , and thereby the flow through the fluid channel is regulatable. <EOS>