| 摘要 |
An assembly of valve sections 10 includes an inlet section 12, an outlet section 14, a working section 16, and a working section 18. The working section 16 is a conventional pressure compensated working section. The working section 18 includes a directional control valve 21, a pressure compensator valve 50, and a pressure limiter valve 52. The valves 50 and 52 can be of integral construction, such that each is an essential part to complete the other. The pressure compensator valve 50 includes a pressure compensator spool 60 movable between an opened position (Figures 2 and 5) and a closed position (Figures and 6) in response to a pressure differential across the spool. The pressure limiter valve 52 includes a pressure limiter spool 76 that moves to an open position to change the pressure differential and close the pressure compensator valve when a selected limit pressure is reached. |
