DIAPHRAGM VALVE AND METHOD FOR MANUFACTURING DIAPHRAGM VALVE ACCORDING TO INJECTION FORMING CAPABLE OF SHOWING EXCELLENT AIRTIGHTNESS AND NO GENERATION OF POLLUTED PARTICLE IN INSIDE OF VALVE

摘要

PURPOSE: A diaphragm valve and a method for manufacturing a diaphragm valve according to injection forming are provided to prevent the generation of pollutants in a valve and to cleanly indicate the opening and closing of the valve. CONSTITUTION: A diaphragm valve(400) comprises a valve lower body(410), a diaphragm, a valve upper body(450), and a handle part(470). A partition(423) is formed in the center of the passage of the valve lower body. The diaphragm is installed in the center of the valve lower body. The handle part includes a connecting member(451), a rubber ring(452), an inner cap(453) for sensing the rotation of the connecting member, a disk for displaying the open degree of the valve, and an open degree display window.