| abstract |
Native system includes for accepting the working fluid under the first pressure together with operating room (W) and accepting one or more valve gear (12,240,242,244,246,410,510,312,314 or 316) of working fluid under the second pressure together with control room (C).Dynamic sealing (58 or 420) may be provided on the shoulder (55 or 451) of valve element (22 or 420).Described valve gear can include just being slidingly engaged to dynamic sealing sleeve (450).Described valve element includes check lever (480).Pressure compensating system (500) can be connected with the hole formed on valve element.Can be connected with the control room of valve gear for monitoring the pressure monitor system (99) of dynamic sealing abrasion. |