| 摘要 |
The valve of the invention basically consists in a rigid valve body with a flow inlet opening (4.1) and one flow outlet (6.1), which are oriented in a substantially cross way to said inlet opening. The body of the valve has a main cavity (10.1) between the flow inlet and outlet with a valve seat (8.1) in the limit of the main cavity and the flow inlet. In addition, the body of the valve has one or more ducts for the control flow inlet, and one or more ducts for the outlet of the same which are associated with the control flow transfer means of the valve. These inlet ducts of control flow may be supplied from a network which is independent from the main flow. The valve has an elastomeric body (20.1) in charge of regulating the flow by its opening or closing, depending on the difference of pressures produced between its walls. The elastomeric body is located inside the main cavity of the valve, said elastomeric body being hollow and opened in one of its axial ends. This elastomeric body is made up of at least two coaxial zones: one sealing zone (20.1) and one second zone of radial sealing (26.1). These zones of the elastomeric body perform specific functions during the operation of the valve, thus avoiding the participation of separate components, which is translated into a complex design of the valve and in an increase of the manufacture costs. <IMAGE> |
