| 摘要 |
A pilot control valve for mining hydraulics. The valve has an insert constructed as a valve cartridge, whose single or multipart valve housing has an input entry for pressure fluid, a connection opening for a load connection, an output opening, opening into the return flow and an axial boring to accept a valve closing body provided with a closing surface, liftable from a valve sealing seat arranged between the entry opening and the connection opening by an electromagnetic or piezoelectric switching device fastenable onto the valve housing. A singe part valve closing body is provided, having a collar shaped sealing surface and the moving part of the closing mechanism in the form of a shaft section, whereby the shaft section enters into a boring section of the axial boring during the lifting movement, closing a radial opening.
|
