Gate valves, such as knife gate valves, flange gate valves, etc., are control devices for fluid lines. The function of the gate valve is to turn on or off the circulation of the pipeline medium, change the circulation of the medium, change the flow direction of the medium, adjust the pressure and flow of the medium, and protect the normal operation of the equipment of the pipeline. However, the gate valve cannot be used for adjustment and throttling.The opening and closing member of the gate valve is a gate. The direction of movement of the gate is perpendicular to the direction of the fluid. The gate valve can only be fully open and fully closed, and cannot be adjusted and throttled. When the gate valve is closed, the sealing surface can be sealed only by the medium pressure, that is, the sealing surface of the ram is pressed against the valve seat on the other side by the medium pressure to ensure the sealing of the sealing surface, which is self-sealing. When the valve of most gate valves is closed, the external force is forced to press the gate to the valve seat to ensure the sealing of the sealing surface. This is called a forced seal. The gate of the gate valve moves linearly with the valve stem, called the lift gate valve, also called the open gate valve. Some gate valves, the stem nut is set on the gate plate, the hand wheel rotates to drive the valve stem to rotate, and the gate is lifted. This valve is called a rotary rod gate valve, or a dark rod gate valve.According to the structure of the gate, the gate valve can be divided into two types: wedge type and parallel type. Wedge rams are available in three configurations: single ram, double ram and resilient ram. The gate valve is further divided into a slab gate valve and a knife gate valve according to the type of structure.The gate valve can be divided into the following categories according to the housing material:Metal material valves: such as carbon steel valves, alloy steel valves, stainless steel valves, cast iron valves, titanium alloy valves, Monel valves, copper alloy valves, lead alloy valves, etc.; metal valve body lining valves: such as rubber-lined valves, fluorine-lined valves Lead-lined valves, lined plastic valves, lining enamel valves; non-metallic valve: such as ceramic valves, glass valves, plastic valves.We are a professional valve manufacturer. Our gate valves, including knife gate valves and flange gate valves, are exported to all countries in the world and enjoy a good reputation among our customers. I hope to hear from you.