| 摘要 |
<p>The cartridge valve (10) has a valve housing (12) having an opening (14) for receiving a valve cartridge (16). The valve cartridge (16) is adapted to be inserted into said opening (14) in said valve housing (12) and has a pressure port (P), a tank port (T), a first exhaust port (A) and a second exhaust port (B). A valve element (58) is mounted in said valve cartridge (16) moveable between a first valve position in which said pressure port (P) is blocked, a second valve position in which said pressure port (P) is connected to one of said first or said second exhaust ports (A,B), and a third valve position in which said pressure port (P) is connected to the other of said first or said second exhaust ports (A,B). Operating means (18,20) are mounted in said valve housing (12) for operating said moveable valve element (58) from said first valve position to one of said second or said third valve positions.</p> |
