The opening and closing part of the high-pressure gate valve is the gate, and the movement direction of the gate is perpendicular to the fluid direction. The gate valve can only be fully opened and closed, not adjusted and throttled. The movement forms of the valve rod include lifting rod type - valve rod lifting, the hand wheel does not lift, or lifting rotating rod type - the hand wheel rotates and lifts with the valve rod, and the nut is set on the valve body.

什么是高压闸阀?有哪些特点?

What is high pressure gate valve? What are the characteristics?

(一)高压闸阀产品特点

（1） Product features of high pressure gate valve

1、采用中法兰螺栓连接，支管两端为法兰连接结构。

1. The middle flange bolt connection is adopted, and the two ends of the branch pipe are flange connection structure.

2、阀座密封面采用铁基铬镍不锈钢堆焊而成，耐磨、抗擦伤性能好。

2. The sealing surface of the valve seat is made of iron-based chromium nickel stainless steel, with good wear resistance and scratch resistance.

3、阀杆表面经抗蚀性氮化处理，具有良好的抗腐蚀性和抗擦伤性。

3. The surface of the valve stem is subject to corrosion resistance nitriding treatment, which has good corrosion resistance and scratch resistance.

4、阀门的关闭和开启由装在阀盖上的电动装置来控制。电动装置分别配有阀门专用电机、减速箱、转矩控制机构、行程控制机构、现场操作机构，手、电动切换机构。阀门的开关均由行程控制机构调整，调整转矩限制机构，可以在行程控制机构失灵的情况下，保护阀门。阀门关闭主要通过电动装置及能够调整的楔式双闸板、万向顶、夹圈等组成，借阀体内导向作升降运动。

4. The closing and opening of the valve are controlled by an electric device installed on the valve cover. The electric device is equipped with special motor for valve, reducer, torque control mechanism, stroke control mechanism, field operation mechanism and manual and electric switching mechanism. The valve switches are adjusted by the travel control mechanism, and the torque limiting mechanism is adjusted to protect the valve in case of failure of the travel control mechanism. The closing of the valve is mainly composed of electric device and adjustable wedge double ram, universal top, clamping ring, etc., and the lifting movement is carried out through the guidance of the valve body.

5、电动装置除能就地操作外，还可进行远距离操作。

5. In addition to local operation, the electric device can also be operated remotely.

(二)高压闸阀结构特点及用途

（2） Structural characteristics and application of high pressure gate valve

1、电动高压闸阀结构紧凑、设计合理，阀门刚性好，通道流畅，流阻系数小。

1. The electric high-pressure gate valve has compact structure, reasonable design, good valve rigidity, smooth channel and small flow resistance coefficient.

2、高压电站闸阀密封面采用不锈钢和硬质合金，使用寿命长。

2. The sealing surface of high-pressure power station gate valve adopts stainless steel and cemented carbide, with long service life.

3、电动高压闸阀采用柔性石墨填料、密封可靠、操作轻便灵活。

3. The electric high-pressure gate valve adopts flexible graphite packing, with reliable sealing and light and flexible operation.

4、驱动方式分手动、电动、气动、齿轮传动，结构型式：弹性楔式单闸板闸阀、刚性楔式单闸板闸阀和双闸板闸阀。

4. The driving mode is divided into pneumatic, electric, pneumatic and gear transmission, and the structural type is elastic wedge single gate valve, rigid wedge single gate valve and double gate valve.

5、高压电站闸阀广泛适用于石油化工、火力发电厂等油品、水蒸汽管路上作接通或截断管路中介质的启闭装置。

5. High pressure power station gate valves are widely used in petrochemical, thermal power plants and other oil and steam pipelines as opening and closing devices to connect or cut off the medium in the pipeline.