Line butterfly valve structure and the introduction of anti-corrosion applications

1, without the use of segmental stem pin connected compact simple structure, convenient maintenance of demolition (which can be removable at the scene); plate with automatic on board function (from top to bottom, left and right), the realization of the disc plate and valve seat surplus less than with the volume.



2, tongue trough valve seat to ensure that the valve body, valve seat, disc and accurate connection between the board and at the same time to facilitate the replacement of the valve seat.



3, using the world's most advanced sealing spherical vice, more reliable sealing. Spherical because it is sealed when the valve gate is in the smooth transition, so a reduction of friction and reduce the torque, you can choose low-power drives, thus reducing the cost of the user. At the same time improve the service life of the valve seat (valve centerline ordinary 3-4 times).



4, valve seat sealing surface flange large broad-brimmed, large circular structure, so that sets of valves can be combined to adapt or welded flange connection request for connection with any standard flange.



5, stem axial positioning device, a two-plus-one outside the ring gasket and a spring ring structure of the way card. This would also effectively prevent the stem has no intention to be demolished at the same time carries a certain degree of axial force to prevent the transmission of stem weight to the butterfly plate.



6, stem from a two-way sealing ring, that is, to prevent intrusion of foreign substances at the same time to prevent the outflow of medium.



7, sleeve support not only stem from the role of torque at the same time reduce the headstock. There are two sleeve options for users, namely: lubricating bronze, PTFE.



8, as a result of its own alternative to the general body of the back seat, an increase of the overall strength of the valve to enable it to achieve the common center line butterfly valve can not achieve the nominal pressure of 20 kg. 

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