Valve apparatus

A valve apparatus for a pressure-actuated system, comprising:

• a pressure medium input (7) configured to connect to a pressure source,
• a relay valve (8) which controls the pressure medium input (7) and is configured to be actuated via a control input (9) of the valve apparatus (1),
• at least one pressure medium output (22) configured to connect to a consumer,
• for each of the at least one pressure medium output (22) a pressure-actuated outlet valve (28) which controls a fluidic connection of the at least one pressure medium output (22) to a main purge (16) leading to atmosphere of the valve apparatus (1), and
• for each of the at least one pressure medium output (22) a pressure-actuated inlet valve (23) arranged between the relay valve (8) and the at least one pressure medium output (22),
• wherein at least one of the pressure-actuated outlet valve (28) or of the pressure-actuated inlet valve (23) is formed as a diaphragm valve and has as a closing member a valve diaphragm (24, 29) which lies on a valve seat (26, 30) and opens against pressure in a purge chamber (31) of the pressure-actuated outlet valve (28) or against the pressure in a purge chamber (27) of the pressure-actuated inlet valve (23),
• wherein each diaphragm valve is assigned an electrically actuatable valve (33, 41) which controls a fluidic connection of the purge chamber (27, 31) to a purge line, wherein the purge line (37, 47) of at least one diaphragm valve is fluidicly connected to the control input (9) of the relay valve (8).