| 摘要 |
Butterfly valve that includes a valve body; a valve element situated to turn within the valve body and move between a first position in which the element stops the flow of fluid through the valve, and a second position in which the flow of fluid through the valve is permitted, and means to avoid the movement of the valve element beyond the fully open position formed by a stop on the valve body and a stop on the valve element. each stop having two stop faces that act to place themselves respectively in contact with the other two stop faces: while the valve has a connection between valve elements, one of which goes through the other, each element is formed by a spline that can be aligned to allow the introduction of a pin and disaligned afterwards to hold the pin with the internal element within the other element, in order to hold the pin in the element to connect the two elements together, and because the valve has a valve seating that includes a metal element and an element of synthetic plastic material formed to make contact along a portion of its external surface, with the metal element having a flange that allows it to be joined to the valve body or valve disc; a convolution for greater flexibility, a seating tip intended to make contact with an hermetical seal with the valve disc or valve body and a support tip intended to support the seating on the valve body or valve disc under certain valve disc load conditions.
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