Soft valve seat and two eccentric butterfly valves of hard disk seat composite seal fireproof

The utility model relates to a soft valve seat and two eccentric butterfly valves of hard disk seat composite seal fireproof mainly includes the valve body, the soft valve seat that sets up in the eccentric side latus rectum of valve body, and hard disk seat with the valve plate of soft valve seat, hard valve seat seal contact, runs through the valve shaft of valve body, valve plate installation and crouches the dress compressing tightly the sealed clamping ring of soft valve seat, hard disk seat in the eccentric side latus rectum of valve body, the characteristic be soft valve seat for be equipped with the all recesses of ring, outer fringe for and flow directn vertically annular support the reinforcing polytetrafluoroethylene material ring form on limit, stainless steel ring physique that the liner that hard disk seat be and the soft valve seat shape is coincide contacted between soft valve seat and valve body and with body seals, the annular of hard disk seat support the limit bothsides respectively and th