gate valveThe gate valve is an opening and closing component, and its movement direction is perpendicular to the fluid direction,gate valveIt can only be fully opened and fully closed, and cannot be adjusted or throttled.gate valveSealing is achieved through the contact between the valve seat and the gate plate, and the sealing surface is usually welded with metal materials to increase wear resistance, such as 1Cr13, STL6, stainless steel, etc. There are rigid gates and elastic gates, depending on the type of gate,gate valveDivided into rigiditygate valveAnd elasticitygate valve.

gate valveThe opening and closing component is a gate, and the direction of movement of the gate is perpendicular to the direction of the fluid,gate valveIt can only be fully opened and fully closed, and cannot be adjusted or throttled. The gate valve has two sealing surfaces, and the two sealing surfaces of the commonly used mode gate valve form a wedge shape. The wedge angle varies with the valve parameters, usually 5 °, and 2 ° 52 'when the medium temperature is not high. Wedge gate valveThe gate can be made as a whole, called a rigid gate; It can also be made into a gate that can produce slight deformation to improve its processability and compensate for the deviation of the sealing surface angle during the processing. This type of gate is called an elastic gate.gate valveWhen closed, the sealing surface can be sealed solely by the pressure of the medium, that is, the sealing surface of the gate is pressed against the valve seat on the other side by the pressure of the medium to ensure the sealing of the sealing surface, which is called self sealing. mostgate valveIt adopts forced sealing, that is, when the valve is closed, it needs to rely on external force to forcefully press the gate plate against the valve seat to ensure the sealing performance of the sealing surface.gate valveThe gate that moves in a straight line with the valve stem is called a lifting rodgate valve, also known as Minggangate valveUsually, there are trapezoidal threads on the lifting rod, which convert rotational motion into linear motion through the nut at the top of the valve and the guide groove on the valve body, that is, convert operating torque into operating thrust. When the valve is opened, when the lifting height of the gate is equal to 1:1 times the valve diameter, the fluid channel is unobstructed, but this position cannot be monitored during operation. In actual use, the vertex of the valve stem is used as a marker, that is, the position where it cannot be opened, as its fully open position. To consider the phenomenon of locking due to temperature changes, it is usually done by opening the valve to the top position and then reversing it by 1/2-1 turn as the position for fully opening the valve. Therefore, the fully open position of the valve is determined by the position of the gate and the stroke. somegate valveThe valve stem nut is set on the gate plate, and the handwheel rotates to drive the valve stem to rotate, thereby lifting the gate plate. This type of valve is called a rotary stemgate valve, also known as hidden polegate valve.