Valve arrangement

A valve arrangement comprising:

• a first valve unit having a monostable first main valve preloaded by a first spring device with a first spring force into a first main valve first switching position and further having an electrically actuatable first pilot valve for switching the first main valve into a first main valve second switching position by means of a first pilot pressure against the first spring force and can be held in the first main valve second switching position, wherein the first pilot pressure is provided by a first pilot fluid that comes from a first pilot pressure source connected to a first pilot connection of the first pilot valve via a first pilot channel during operation of the valve arrangement;
• and
• a second valve unit having a monostable second main valve preloaded by a second spring device with a second spring force into a second main valve first switching position and further having an electrically actuatable second pilot valve for switching the second main valve into a second main valve second switching position by means of a second pilot pressure against the second spring force and can be held in the second main valve second switching position, wherein the second pilot pressure is provided by a second pilot fluid that comes from a second pilot pressure source connected to a second pilot connection of the second pilot valve via a second pilot channel during operation of the valve arrangement,
• wherein the first main valve has a first working valve section having a plurality of first working connections connected to one another and/or disconnected from one another in the first switching position of the first main valve in a first working configuration and in the second switching position of the first main valve in a second working configuration within the first main valve and wherein the second main valve has a second working valve section having a plurality of second working connections connected to one another and/or disconnected from one another in the first switching position of the second main valve in a first working configuration and in the second switching position of the second main valve in a second working configuration within the second main valve, wherein at least one of the first working connections and at least one of the second working connections are designed as connecting working connections, the connecting working connections being permanently connected to one another via a working connection channel system, and
• wherein at least one of the first or second working connections is an output working connection suitable for connecting a fluid-operated actuator, and
• wherein the first main valve has a first monitoring valve section with a plurality of first monitoring connections always connected to one another and/or separated from one another in a first monitoring configuration in the first switching position of the first main valve and are always connected to one another and/or separated from one another in a second monitoring configuration that differs from the first monitoring configuration in the second switching position of the first main valve, and
• wherein the second main valve has a second monitoring valve section with a plurality of second monitoring connections always connected to one another and/or separated from one another in a first monitoring configuration in the first switching position of the second main valve and are always connected to one another and/or separated from one another in a second monitoring configuration that differs from the first monitoring configuration in the second switching position of the second main valve, and
• wherein one of the first monitoring connections of the first monitoring valve section is designed as a first venting monitoring connection and one of the second monitoring connections of the second monitoring valve section is designed as a second venting monitoring connection, wherein each further first monitoring connection and each further second monitoring connection are connected to a monitoring channel system, and
• wherein the first pilot connection and/or the second pilot connection is connected via the monitoring channel system to the first venting monitoring connection and/or the second venting monitoring connection and is thus vented if one of the two main valves assumes its first switching position and the other of the two main valves simultaneously assumes its second switching position, and
• wherein the first monitoring valve section is fluidically separated from the first working valve section, and
• wherein the second monitoring valve section is fluidically separated from the second working valve section, and
• wherein the first venting monitoring connection is permanently communicating with a pressure sink, and
• wherein the second venting monitoring connection is permanently communicating with the pressure sink, and
• wherein the monitoring channel systems contains both the first pilot channel and the second pilot channel.