Rail ball valve is the same type of valve as gate valve. In the pipeline, it is mainly used to cut off, distribute and change the flow direction of the medium. It is also a new type of valve widely used in recent years.

轨道球阀适用于石油及石油制品、天然气、机场、化工、等输送管线和站场上，用作截断介质流。

Rail ball valve is applicable to oil and petroleum products, natural gas, airport, chemical industry, environmental protection and other transmission pipelines and stations, and is used to cut off medium flow.

工作原理

working principle

开启过程

Opening process

在关闭位置，球体受阀杆的机械施压作用，紧压在阀座上。

In the closed position, the ball is pressed against the valve seat by the mechanical pressure of the valve stem.

当逆时针转动手轮时，阀杆则反向运动，其底部角形平面使球体脱开阀座。

When the handwheel is rotated counterclockwise, the valve rod will move in the opposite direction, and the angular plane at the bottom will make the ball disengage from the valve seat.

阀杆继续提升，并与阀杆螺旋槽内的导销相互作用，使球体开始无摩擦地旋转。

The valve rod continues to lift and interacts with the guide pin in the spiral groove of the valve rod, so that the ball starts to rotate without friction.

直到全开位置，阀杆提升到极限位置，球体旋转到全开位置。

Until it reaches the fully open position, the valve rod is lifted to the limit position, and the ball rotates to the fully open position.

关闭过程

Closing process

关闭时，顺时针旋转手轮，阀杆开始下降并使球体离开阀座开始旋转。

When the valve is closed, rotate the hand wheel clockwise, and the valve rod starts to drop and the ball starts to rotate when it leaves the valve seat.

继续旋转手轮，阀杆受到嵌于其上螺旋槽内的导销的作用，使阀杆和球体同时旋转90°。

Continue to rotate the handwheel, and the valve stem is subject to the action of the guide pin embedded in the spiral groove on the handwheel, so that the valve stem and the ball rotate 90 ° at the same time.

快要关闭时，球体已在与阀座无接触的情况下旋转了90°。

When the valve is about to close, the ball has rotated 90 ° without contact with the valve seat.

手轮转动的后几圈，阀杆底部的角形平面机械地楔向压迫球体，使其紧密地压在阀座上，达到完全密封。

During the last few turns of the handwheel, the angular plane at the bottom of the valve stem mechanically wedges the ball to press it tightly against the valve seat to achieve complete sealing.

轨道球阀特点

Features of rail ball valve

启闭无摩擦

Opening and closing without friction

密封面和阀座密封面采用无摩擦设计，了传统阀门因密封面之间相互摩擦而影响密封的问题，保障阀门密封体寿命。

The non friction design is adopted for the sealing surface and the valve seat sealing surface, which solves the problem that the sealing of the traditional valve is affected by the mutual friction between the sealing surfaces and ensures the service life of the valve sealing body.

上装式结构

Top mounted structure

采用顶装式设计，保证阀门内部零件的更换和维修可以通过拆卸阀门阀盖进行在线检查与维修，有效减少装置停车，降低成本；

The top mounted design ensures that the replacement and maintenance of the internal parts of the valve can be carried out online inspection and maintenance by disassembling the valve cover, effectively reducing the shutdown of the device and reducing the cost;

单阀座设计

Single seat design

了阀门中腔介质因异常升压而影响使用的问题；

It eliminates the problem that the medium in the chamber of the valve affects the use safety due to abnormal pressure rise;

低扭矩设计

Low torque design

采用具有固定枢轴结构的球阀，保证阀门开关迅捷、低扭矩、易于开启和关闭；

The ball valve with fixed pivot structure is adopted to ensure the quick opening and closing of the valve, low torque and easy opening and closing;

楔形密封结构

Wedge seal structure

阀门是靠阀杆提供的机械力，将球楔压到阀座上而密封，使阀门的密封性不受管线压差变化的影响，在各种工况下密封性能都有可靠保证；

The valve is sealed by pressing the ball wedge onto the valve seat by the mechanical force provided by the valve stem, so that the sealing performance of the valve is not affected by the change of pipeline pressure difference, and the sealing performance is reliably guaranteed under various working conditions;

密封面的自清洁结构

Self cleaning structure of sealing surface

当球体倾离阀座时，管线中的流体沿球体密封面成360°均匀通过，不仅了高速流体对阀座局部的冲刷，也冲走了密封面上的聚积物，达到自清洁的目的，进一步提高阀门的密封寿命。

When the ball tilts away from the valve seat, the fluid in the pipeline passes through the sealing surface of the ball at 360 ° evenly, which not only eliminates the local scouring of the valve seat by the high-speed fluid, but also washes away the accumulation on the sealing surface to achieve the purpose of self-cleaning and further improve the sealing life of the valve.