Compressed air supply installation for the operation of a pneumatic system comprising: - a compressed air feed, a compressed air connection to a pneumatic unit and a venting connection or a further venting connection to the surroundings, wherein: - a main pneumatic line is formed between the compressed air feed and the compressed air connection; - a venting line having a venting valve connected via a first and a second venting valve connection (73X, 73Y) is formed between the compressed air connection and the venting connection, wherein - the venting valve additionally comprises a control connection, which is connected in pneumatic connection to a control valve by means of a pneumatic control relay line, and - the venting valve - in a first switching state of the venting valve is closed between the first venting valve connection and the second venting valve connection to the venting connection; and - in a second switching state of the venting valve is opened between the first venting valve connection and the second venting valve connection to the venting connection, and - the control valve - in a first switching state is closed between a control pressure input connection and a control pressure output connection to the control connection; and - in a second switching state is opened between the control pressure input connection and the control pressure output connection to the control connection, in order to subject the control connection of the venting valve to pressure and to shift the venting valve from the first or second switching state of the venting valve into the other respective switching state of the venting valve; and - the control valve is embodied in the form of a 2/2-way directional control valve, characterized in that - the pneumatic control relay line is connected to the venting connection and/or a further venting connection by means of an additional venting line in the first and/or second switching state of the venting valve, and wherein - the additional venting line is pneumatically connected to a portion of the venting line between the second venting valve connection and the venting connection and/or to the further venting connection. - a compressed air feed, a compressed air connection to a pneumatic unit and a venting connection or a further venting connection to the surroundings, wherein: - a main pneumatic line is formed between the compressed air feed and the compressed air connection; - a venting line having a venting valve connected via a first and a second venting valve connection (73X, 73Y) is formed between the compressed air connection and the venting connection, wherein - the venting valve additionally comprises a control connection, which is connected in pneumatic connection to a control valve by means of a pneumatic control relay line, and - the venting valve - a main pneumatic line is formed between the compressed air feed and the compressed air connection; - a venting line having a venting valve connected via a first and a second venting valve connection (73X, 73Y) is formed between the compressed air connection and the venting connection, wherein - the venting valve additionally comprises a control connection, which is connected in pneumatic connection to a control valve by means of a pneumatic control relay line, and - the venting valve - in a first switching state of the venting valve is closed between the first venting valve connection and the second venting valve connection to the venting connection; and - in a second switching state of the venting valve is opened between the first venting valve connection and the second venting valve connection to the venting connection, and - the control valve - in a first switching state is closed between a control pressure input connection and a control pressure output connection to the control connection; and - in a second switching state is opened between the control pressure input connection and the control pressure output connection to the control connection, in order to subject the control connection of the venting valve to pressure and to shift the venting valve from the first or second switching state of the venting valve into the other respective switching state of the venting valve; and - the control valve is embodied in the form of a 2/2-way directional control valve, characterized in that - the pneumatic control relay line is connected to the venting connection and/or a further venting connection by means of an additional venting line in the first and/or second switching state of the venting valve, and wherein - the additional venting line is pneumatically connected to a portion of the venting line between the second venting valve connection and the venting connection and/or to the further venting connection.