The switching valve (10) comprises a valve body (12) and a switching mechanism (14).

The switching valve mechanism (41) is provided with a valve element (61) for switching which is located within a casing (42).

The second confluence control valve is switched by the pilot pressure of the second switching valve, and disconnects the connection between the third pump and the first switching valve.

A housing for the switching valve is provided.

In the stable position of said monostable reversing valve (14) the position of the relay valve occupied immediately prior to switching the relay valve (12) is held stable, and thus pneumatically 'locked.'

The first confluence control valve is switched by the pilot pressure of the first switching valve or the second switching valve, and connects to the downstream side of the third pump.

Electric drive for a switching valve, the switching valve having such a drive, and a regenerative thermal oxidizer including the switching valve and drive system.

A hydraulic control apparatus 1 includes a switch valve 11, an adjustment valve 12, and a valve control device 13.

A solenoid switch valve (32) opens and closes a pressure channel (31).

A switching valve having a first fluid input and a second fluid input also has a fluid output.

KSPG content is the electrical switching valve and the control valve.

A monostable reversing valve is disposed in a feedback branch of the relay valve (12) between the output (11) thereof and the control input (17) thereof.

The switching valve is configured to switch fluid communication to the fluid output between the first fluid input and the second fluid input.

The other hydraulic system is connected with the boom hydraulic system by a connecting pipeline (13), in which a switch valve (11) is arranged.

The jack-up switch valve (25) is switched in accordance with a bottom pressure in the boom cylinder (11).