The valve stem and the valve plate are connected by threads. When the valve stem is rotated, the valve plate will rotate accordingly. When the valve plate is closed, the medium cannot pass; when the valve plate is opened, the medium can flow. The square knife gate valve usually adopts a flange connection method to connect the valve to the pipeline flange, so that the valve can withstand greater pressure and flow. The gate valve has good sealing performance and can effectively prevent medium leakage.

The gate valve can prevent the reverse flow of the fluid by moving the gate to the closed position. In applications where fluid backflow needs to be prevented, the gate valve can play a good reverse blocking role.

The manual square knife gate valve has the advantages of simple and compact structure, reasonable design, reliable sealing, light and flexible operation, small size, smooth channel, small resistance, easy installation, and easy disassembly. The manual spiral gate valve can be installed horizontally or vertically, and has the characteristics of anti-wear and automatic compensation functions and long life.

The electric or pneumatic square knife gate valve is opened or closed by the sliding ball chain installed on the two sides of the shell, so that the gate is restricted to run in the rail guide. The optimized design scheme is adopted, the gate moves smoothly and lightly, and the driving torque is small.