| 摘要 |
The valve of the invention basically consists in a rigid valve body with a flow inlet opening and one flow outlet. The body of the valve has a main cavity between the flow inlet and outlet with a valve seat 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 and flows of a nature different from that of the main flow can be used. Similarly, the outlet ducts of the control flow can discharge it in a network which is independent from the main one. The valve has an elastomeric body in charge of regulating the flow by its opening or closing, depending on the difference of pressures produced between its walls, which are modified by the flow transfer means which control the flow. The elastomeric body is made up of at least two coaxial zones: one sealing zone and one second zone of radial sealing.
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