Valve element of tank bottom valve

The invention discloses a valve element of a tank bottom valve. The valve element comprises a valve element framework, a cap for sealing a feeding opening of the tank bottom valve and a silicon rubberbase for isolating an executing mechanism, wherein the cap is made of polytetrafluoroethylene; the cap covers the top of the valve element framework; the silicon rubber base covers a side wall of thebottom of the valve element framework; a thread hole or an inner groove which is connected with a valve rod of the executing mechanism are formed in an end face of the bottom of the valve element framework. The valve element disclosed by the invention is simple and compact in structure, small space for installation and strong anti-corrosion capability. 本发明公开了种罐底阀阀芯，包括阀芯骨架和用于密封罐底阀进料口的帽盖和用于隔绝执行机构的硅橡胶底座，帽盖的材质为聚四氟乙烯，帽盖包裹住阀芯骨架的顶部，硅橡胶底座包裹住阀芯骨架底部侧壁，阀芯骨架底部的端面上开设有与执行机构的阀杆连接的螺纹孔或内槽。该阀芯结构简单、紧凑，安装所需空间小，抗腐蚀能力强。