Flow control valve apparatus

A flow control valve apparatus comprising:

• a housing including a first pump port, a second pump port, a first tank port, a second tank port, a first supply/discharge port, a second supply/discharge port, and a spool hole at which all of these ports are open;
• a first spool configured to switch a connection status among the first pump port, the first tank port, and the first supply/discharge port depending on a position of the first spool;
• a first actuator configured to move the first spool to each of a first supply position where the first pump port and the first supply/discharge port are connected to each other and a first discharge position where the first tank port and the first supply/discharge port are connected to each other;
• a second spool configured to switch a connection status among the second pump port, the second tank port, and the second supply/discharge port depending on a position of the second spool;
• and
• a second actuator configured to move the second spool to each of a second supply position where the second pump port and the second supply/discharge port are connected to each other and a second discharge position where the second tank port and the second supply/discharge port are connected to each other, wherein
• the first spool and the second spool are inserted in the spool hole so as to reciprocate.