Sanitary Diaphragm Valve drives the movement of the valve stem through the control of the drive device (manual, pneumatic or electric), and the valve stem drives the deformation of the diaphragm to control the flow of the fluid. When the valve is open, the diaphragm bulges upward, and the fluid flows through the valve body unimpeded; when the valve is closed, the diaphragm is pressed flat downward, completely blocking the fluid channel, achieving precise flow control.