| 摘要 |
<p>A control valve includes a generally hollow, cylindrically-shaped main body which at one end is integrally connected to a nozzle which has a bore therethrough and a flat external annular sealing surface which is contactable by a separate sealing element. Inside of the main body is positioned a valve part which at one end includes separate inlet and outlet hose connections for separate connection to, respectively, a pressurized control medium and to a controlled operating unit which controls the operation of the movement of the sealing element, and at the other end has a hollow cylindrical interior in which is positioned an axially-loaded spring, a valve piston and a sealing ring, the spring loading the valve piston against the sealing ring. A rod or tappet which at one end contacts the separate sealing element extends through the bore in the nozzle and through an axial bore in the sealing ring and abuts against the valve piston. A bore provides for fluid communication between the hose connection connected to the pressurized control medium and the hollow cylindrical interior of valve body and, when the separate sealing element is in contact with the flat external annular sealing surface of the nozzle, the inlet hose connection and the outlet hose connection are in fluid communication.</p> |
