截止阀又称截止阀，是一种力密封阀。因此，当良工阀门厂闸阀关闭时，必须对阀瓣施加压力，以防止突面泄漏。当介质进入阀瓣下方的闸阀时，操作力必须克服的阻力是阀座与填料之间的摩擦和介质压力产生的推力。关闭阀门的力大于打开阀门的力，所以阀座阀门的直径要大；否则阀座会弯曲失效。良工阀门厂截止阀按连接方式分为三种:法兰连接、法兰连接和焊接连接。自密封阀出现后，截止阀介质的流动方向从阀瓣上方流向阀腔。
A shut-off valve, also known as a shut-off valve, is a force sealed valve. Therefore, when the gate valve of Lianggong Valve Factory is closed, pressure must be applied to the valve disc to prevent protrusion leakage. When the medium enters the gate valve below the valve disc, the resistance that the operating force must overcome is the friction between the valve seat 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 seat should be larger; Otherwise, the valve seat will bend and fail. The stop valves of Lianggong Valve Factory are divided into three types of connection methods: flange connection, flange 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.
此时，在介质压力的作用下，阀门关闭力小，阀门开启力大，阀座直径可以相应减小。同时，在介质的影响下，这种闸阀更加紧密。我们的闸阀曾经规定，截止阀的流向应该是上下的。当截止阀打开时，阀瓣的打开高度为公称直径的250%。流量已达到较大值，表明闸阀已达到全开位置。所以截止阀的全开位置必须由阀瓣的行程来确定。
At this point, under the action of medium pressure, the valve closing force is small, while the valve opening force is large, and the valve seat diameter can be correspondingly reduced. At the same time, under the influence of the medium, this type of gate valve is more compact. Our country's gate valve once stipulated that the flow direction of the stop valve should be up and down. 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 high value, indicating that the gate valve has reached the fully open position. So the fully open position of the shut-off valve must be determined by the stroke of the valve disc.
良工阀门厂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。阀座运动模式(俗称暗阀座)还有一种旋转升降杆，可用于控制气体、水、蒸汽、各种腐蚀性介质、油脂、油脂、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流。由于良工阀门厂这种截止阀的阀座启闭行程较短，截止功能非常可靠，而且由于阀座口的变化与阀瓣的行程成正比，非常适合设置流量。
The opening and closing part of the stop valve at Lianggong Valve Factory is a plug shaped valve disc, with a flat or conical surface at the top of the seal. The valve disc moves in a straight line along the centerline of the valve seat. The valve seat movement mode (commonly known as the dark valve seat) also has a rotating lifting rod that can be used to control gas, water, steam, various corrosive media, grease, grease, liquid metal, and radioactive media. Therefore, this type of globe valve is very suitable for closing or adjusting and throttling. Due to the short opening and closing stroke of the valve seat in Lianggong Valve Factory, the cut-off function is very reliable, and the change in the valve seat opening is proportional to the stroke of the valve disc, making it very suitable for setting the flow rate.
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