Valve device for a compressed air system of a trailer of a commercial vehicle

The device (5) has an emergency brake valve (19) controlling pressurization of a service brake based on pressure at a terminal (21) that is connected with a coupling head (2). A spring accumulator valve controls the pressurization of a spring brake based on pressure at another terminal (45) that is connected with the coupling head and a container (4), where the spring accumulator valve and the emergency brake valve are independently extended from each other. Actuating pressure of the accumulator valve is dependent on an operational position of the brake valve. The spring accumulator valve and the emergency brake valve are designed as a slide valve and a seat valve. An independent claim is also included for valve facility groups.