Q21N镀锌高压球阀它具有旋转90度的动作，旋塞体为球体，有圆形通孔或通道通过其轴线。球阀在管路中主要用来做切断、分配和改变介质的流动方向，它只需要用旋转90度的操作和很小的转动力矩就能关闭严密。球阀适宜做开关、切断阀使用，但近来的发展已将球阀设计成使它具有节流和控制流量之用，如V型球阀。

        Q21N镀锌高压球阀有镀白锌和彩锌2种。正常连接方式有内螺纹式 卡套式和活接焊接式三种连接方式。Q21N镀锌高压球阀本身结构紧凑，密封稳定，结构简单，维修方便，密封面与球面常在闭合状态，不易被介质冲蚀，易于操作和维修，适用于水、溶剂、酸和天然气等一般工作介质，而且还适用于工作条件恶劣的介质，如氧气、过氧化氢、甲烷和乙烯等，在各行业得到广泛的应用。球阀阀体可以是整体的，也可以是组合式的。

Q21N镀锌高压球阀优点：

        1．流体阻力小，全通径的球阀基本没有流阻。

        2．结构简单、体积小、重量轻。

        3．紧密稳定。它有两个密封面，而且目前球阀的密封面材料广泛使用各种塑料，密封性好，能实现完全密封。在真空系统中也已广泛使用。

        4．操作方便，开闭迅速，从全开到全关只要旋转90°，便于远距离的控制。

        5．维修方便，球阀结构简单，密封圈一般都是活动的，拆卸更换都比较方便。

        6．在全开或全闭时，球体和阀座的密封面与介质隔离，介质通过时，不会引起阀门密封面的侵蚀。

        7．适用范围广，通径从小到几毫米，大到几米，从高真空至高压力都可应用。

        8．由于球阀在启闭过程中有擦拭性，所以可用于带悬浮固体颗粒的介质中。

焊接高压球阀产品概述

焊接高压球阀是一种适用于高压管路系统，通过焊接方式连接的阀门，主要用于控制流体的通断与流量。以下是其产品概述 ：

焊接高压球阀- 结构设计：常采用三段式结构，由阀体、阀盖、阀座、球体、阀杆和手柄等组成。阀体多为锻造而成，阀盖通过螺栓与阀体连接，阀座安装于阀体和阀盖之间，球体位于两阀座中间，阀杆与球体相连，手柄安装在阀杆上端，方便操作 。

焊接高压球阀 - 连接方式：采用对焊或承插焊连接，与管道焊接为一体，密封性强，能有效防止泄漏，同时具备较高的连接强度，适用于高压环境 。

焊接高压球阀 - 工作原理：通过旋转球体来控制流体通断。球体绕阀体中心线旋转90°，可实现全开或全关，当球体与阀座贴合时，阀门关闭，阻止流体通过；球体与阀座分离时，阀门打开，允许流体流过 。

焊接高压球阀 - 性能特点：具有结构紧凑、开闭迅速、流阻小的特点。密封性能稳定，可承受较高压力，部分产品能耐受高温或低温环境，且维修方便，可装驱动装置实现遥控和自控 。

焊接高压球阀 - 适用范围：适用介质包括水、油、气及某些腐蚀性液体等，广泛应用于石油、化工、电力、城建等行业的高压管路系统中，用于截断或接通管路介质，也可用于调节流量 。

Product Overview of Welded High - pressure Ball Valve

The welded high - pressure ball valve is a kind of valve suitable for high - pressure pipeline systems, which is connected by welding, is mainly used to control the on/off flow rate of fluid. The product overview is as follows:

- Structural Design: It often adopts a three - piece structure, consisting of a valve body, valve cover, valve seat, ball, valve stem handle. The valve body is mostly forged. The valve cover is connected to the valve body by bolts. The valve seat is installed between the valve body the valve cover. The ball is located between the two valve seats. The valve stem is connected to the ball, the handle is installed at the upper end of the valve stem for easy operation .

- Connection Mode: It adopts butt - welding socket - welding connection, which is welded to the pipeline as a whole, with strong sealing performance, which can effectively prevent leakage. At the same time, it has high connection strength, suitable for high - pressure environments .

- Working Principle: The on/off of the fluid is controlled by rotating the ball. The ball rotates 90° around the center line of the valve body to achieve full - open full - close. When the ball fits closely with the valve seat, the valve is closed to prevent the fluid passing through. When the ball is separated the valve seat, the valve is opened to allow the fluid to flow through .

- Performance Characteristics: It has the characteristics of compact structure, rapid opening closing, small flow resistance. With reliable sealing performance, it can withstand high pressure. Some products can withstand high - temperature low - temperature environments, are convenient for maintenance. It can be equipped with a driving device to realize remote control automatic control .

- Scope of Application: The applicable media include water, oil, gas some corrosive liquids, etc. It is widely used in the high - pressure pipeline systems of petroleum, chemical, electric power, urban construction other industries, used to cut off connect the pipeline medium, can also be used to regulate the flow rate .