A shut-off valve, also known as a shut-off valve, is a force sealed valve, so when the valve is closed, pressure must be applied to the valve disc to prevent leakage of the sealing surface. The manufacturer of Lianggong valve tells you that when the medium enters the valve below the valve disc, the resistance that the operating force must overcome is the friction between the valve stem and the packing and the thrust generated by the medium pressure. The force to close the valve is greater than the force to open the valve, so the diameter of the valve stem should be larger; Otherwise, the valve stem will bend and fail.

良工阀门厂家告诉你截止阀按连接方式分为三种:法兰连接、螺纹连接和焊接连接。自密封阀出现后，截止阀介质的流向从阀瓣上方流向阀腔。此时，在介质压力的作用下，阀门关闭力小，阀门开启力大，阀杆直径可以相应减小。同时，在介质的作用下，这种阀门更加紧密。

The manufacturer of Lianggong Valve tells you that stop valves can be divided into three types of connection: flange connection, threaded connection, and welding connection. After the appearance of a self sealing valve, the flow direction of the shut-off valve medium flows from above the valve disc to the valve chamber. At this point, under the action of medium pressure, the closing force of the valve is small, while the opening force of the valve is large, and the diameter of the valve stem can be correspondingly reduced. At the same time, under the action of the medium, this type of valve becomes tighter.

我们的阀门曾规定，截止阀的流向应该是自上而下的。当截止阀打开时，阀瓣的开启高度为公称直径的250%。流量已达到较大值，表明阀门已达到全开位置。所以，截止阀的全开位置必须由阀瓣的行程决定。良工阀门厂家告诉你截止阀的开启和关闭部分是一个塞状阀瓣，密封顶部有一个平面或圆锥面，阀瓣沿阀座线直线移动。阀杆运动模式(俗称暗阀杆)还有一种旋转升降杆，可用于控制空气、水、蒸汽、各种腐蚀性介质、油泥、油、液态金属和放射性介质。因此，这种类型的截止阀非常适合关闭或调整和节约流量。

Our country's valves have stipulated that the flow direction of the shut-off valve should be from top to bottom. When the shut-off valve is opened, the opening height of the valve disc is 250% of the nominal diameter. The flow rate has reached a large value, indicating that the valve has reached the fully open position. Therefore, the fully open position of the shut-off valve must be determined by the stroke of the valve disc. The manufacturer of Lianggong Valve tells you that the opening and closing parts of the globe valve are a plug shaped disc, with a flat or conical surface at the top of the seal, and the disc moves in a straight line along the centerline of the valve seat. The valve stem movement mode (commonly known as the dark valve stem) also has a rotating lifting rod that can be used to control air, water, steam, various corrosive media, sludge, oil, liquid metal, and radioactive media. Therefore, this type of globe valve is very suitable for closing or adjusting and saving flow.

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