移动暴龙捕鱼

Yincun Town, Longyao County, Hebei Province

Home >> News >> How the Gate Valve Works

How the Gate Valve Works

Aug. 18, 2020

Gost gate valve manufacturer share with you: The opening and closing part of gate valve is the gate, the movement direction of the gate is perpendicular to the direction of the fluid, gate valve can only be fully open and fully closed, can not be adjusted and throttle. The gate has two sealing surfaces. The two sealing surfaces of the most commonly used gate valves form a wedge shape. The wedge angle varies with the valve parameters, usually 5 °, and 2 ° 52 'when the medium temperature is not high. The gate of the wedge gate valve can be made into a whole, called a rigid gate; it can also be made into a gate that can produce a small amount of deformation to improve its processability and make up for the deviation of the sealing surface angle during processing. The plate is called a spring gate. When the gate valve is closed, the sealing surface can be sealed only by the pressure of the medium, that is, the sealing surface of the gate is pressed against the valve seat on the other side to ensure the sealing of the sealing surface, which is self-sealing. Most gate valves are forcedly sealed, that is, when the valve is closed, the gate is forced to be pressed against the valve seat by external force to ensure the tightness of the sealing surface. The gate of the gate valve moves linearly with the valve stem, which is called a lift lever gate valve, also known as an open lever gate valve. Usually, there is a trapezoidal thread on the lifting rod. The nut at the top of the valve and the guide groove on the valve body change the rotary motion into a linear motion, that is, the operating torque is changed to the operating thrust. When the valve is opened, when the lift height of the gate is equal to 1: 1 of the valve diameter of the valve i, the fluid channel is completely unblocked, but this position cannot be monitored during operation. In actual use, the apex of the valve stem is used as a mark, that is, the position that cannot be opened, as its fully open position. In order to consider the lock-up phenomenon due to temperature changes, it is usually opened to the top position, and then back to 1/2-1 turn, as the position of the fully open valve. Therefore, the fully open position of the valve is determined by the position of the shutter, that is, the stroke. In 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 plate is lifted. This kind of valve is called a rotary lever gate valve, or a dark lever gate valve.

Gost Gate Valve

Gost Gate Valve

Gost gate valve movement:
移动暴龙捕鱼 When the gate valve is closed, the sealing surface can be sealed only by the medium pressure, that is, only by the pressure of the medium z41h flange wedge gate valve. . Most gate valves are forcibly sealed, that is, when the valve is closed, the gate is forced to be pressed against the valve seat by external force to ensure the tightness of the sealing surface. Movement mode: The gate of the gate valve moves linearly with the valve stem, also known as the open-rod gate valve. There is usually a trapezoidal thread on the lifting rod. The nut at the top of the valve [] and the guide groove on the valve body change the rotary motion into linear motion, that is, the operating torque is changed to the operating thrust. When the valve is opened, when the lift height of the gate is equal to 1: 1 of the valve diameter, the fluid channel is completely clear, but this position cannot be monitored during operation. In order to consider the lock-up phenomenon due to temperature changes, it is usually opened to the top position, and then back to 1/2-1 turn, as the position of the fully open valve. Therefore, the fully open position of the valve is determined according to the position of the gate (ie, the stroke>. Some gate valve stem nuts are located on the gate, and the handwheel rotates to drive the valve stem to rotate, and the gate is lifted. It is called a rotary lever gate valve or a dark lever gate valve.