| 摘要 |
<p>A flow valve operating by pressure differentials and by flow transfer means which regulate small flows of control consists in a rigid valve body (2,1) with an opening for flow inlet and one opening for flow outlet, which are oriented in a substantially cross way to said flow opening. The body of the valve has a main cavity between the flow inlet and the flow outlet. A valve seat (8,1) is in the limit of the main cavity and the flow inlet. In addition, the valve body has pipes for the inlet (14.1) of the control flow and for the outlet (16.1) of the control flow, which are associated with the flow transfer means for the control of the valve. The valve also has an elastomeric body (20.1) in charge of regulating the flow of it, being located inside the main cavity of the valve, the same being hollow and open in one of its axial ends and has a central hole (28.1) in the other end. This elastomeric body is at least made up of two coaxial zones: one sealing zone (22.1) and a second zone of radial seal (26.1). Eventually, a third intermediate zone or a zone of thin wall. <IMAGE></p> |
