| 摘要 |
<p>PROBLEM TO BE SOLVED: To simplify the structure and further reduce the complexity of a production by that a separation valve section for controlling the flow of an operation oil flowing from a pump to a different actuator receives a load force added to the actuator for generating a hydraulic load pressure. SOLUTION: A valve assembly 12 is composed of individual valves 13, 14, 15 approached between two end sections 16, 17 and connected to each other. These valve sections control the flow of an operation liquid flowing to one of some actuators 20 connected from a pump 18 to an operation member and the fluid returned to a tank 19. A pressure compensation valve 48 has a poppet valve 60 and valve member 64 mutually slided in a seal up state in the hole of a valve main body respectively. The poppet valve 60 works as a check valve for preventing the forced backflow of the operation liquid from the actuator 20 to the pump 18 through a valve section when an operation port pressure becomes larger than the supply pressure of a supply passage 43.</p> |
