TWO-PORT CARTRIDGE SEAT VALVE

摘要

A two-port cartridge type seat valve comprises a valve sleeve (112) having a stepped guide bore (180, 182) for a poppet (114). The poppet (114) comprises a piston flange (184) which divides the second step (182) of the guide bore axially into an end-face first pilot chamber and an annular second pilot chamber (186 and 188). A first connection channel (194) through the valve sleeve (112) connects the annular second pilot chamber (188) with an annular chamber (140) into which a lateral main flow port (30) opens. The free cross-section of a valve seat (144) and of an axial main flow-bore (146) correspond approximately to the crosssection of the first step (180) of the guide bore. (Figure 3)