Q27Y固定式焊接球阀的球和阀座都是通过喷焊STL合金后进行配合研磨。可以耐高温到650℃，高压42MPa,可以通过颗粒状介质。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。

  Q27Y固定式焊接球阀的主要特点是结构紧凑，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。

       Q27Y固定式焊接球阀优点：

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。耐高温 耐高压 方便安装执行机构。

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。

固定式焊接球阀产品概述

固定式焊接球阀是一种球体位置固定且采用焊接连接方式的球阀，通过阀体两端与管道焊接相连，具有结构稳固、密封稳定的特点，适用于高压、高流速等对连接强度和密封性要求较高的工况。以下是其产品概述：

固定式焊接球阀- 结构组成：主要由阀体、固定球体、阀座、阀杆、焊接端及执行机构（手动、电动、气动等）组成。球体与阀杆连接牢固，工作时仅做旋转运动而无轴向位移，确保密封稳定性；阀体两端为焊接端，可与管道直接焊接，减少连接松动风险。

固定式焊接球阀- 工作原理：通过旋转阀杆带动球体旋转90度实现启闭。开启时，球体通孔与管道通道对齐，介质流通；关闭时，球体阻断通道，利用阀座与球体的紧密贴合形成密封，防止介质泄漏。

固定式焊接球阀- 特点优势：焊接连接强度高、密封性好，抗振动和抗冲击能力强，适用于高压、易燃易爆等严苛工况；球体固定设计减少密封面磨损，延长使用寿命；结构紧凑，流阻小，操作简便且启闭迅速；材质多选用碳钢、不锈钢等，耐腐蚀性和耐高温性较好。

固定式焊接球阀- 技术参数：公称通径常见DN15-DN300等规格，公称压力一般为PN16-PN250，适用温度范围根据材质不同约为-20℃至425℃（碳钢）或-196℃至540℃（不锈钢）。

固定式焊接球阀- 应用领域：广泛应用于石油化工、天然气输送、电力、冶金等行业，用于控制原油、天然气、蒸汽、高温油品等介质的通断。

The fixed welded ball valve is a type of ball valve with a fixed ball position welded connection. It is connected to pipelines by welding at both ends of the valve body, featuring a stable structure reliable sealing performance, suitable for working conditions with high requirements for connection strength tightness, such as high pressure high flow rate. The product overview is as follows:

 The fixed welded ball- Structural composition: It mainly consists of a valve body, a fixed ball, a valve seat, a valve stem, welded ends an actuator (manual, electric, pneumatic, etc.). The ball is firmly connected to the valve stem, only rotates without axial displacement during operation, ensuring sealing stability; both ends of the valve body are welded ends, which can be directly welded to the pipeline to reduce the risk of connection loosening.

The fixed welded ball- Working principle: The valve is opened closed by rotating the valve stem to drive the ball to rotate 90 degrees. When opened, the through-hole of the ball is aligned with the pipeline channel, allowing medium to flow; when closed, the ball blocks the channel, a seal is formed by the close fit between the valve seat the ball to prevent medium leakage.

The fixed welded ball- Features advantages: The welded connection has high strength good sealing performance, with strong resistance to vibration impact, suitable for harsh working conditions such as high pressure, flammable explosive environments; the fixed ball design reduces wear on the sealing surface prolongs service life; it has a compact structure, low flow resistance, simple operation quick opening closing; materials such as carbon steel stainless steel are mostly used, with good corrosion resistance high temperature resistance.

The fixed welded ball- Technical parameters: The nominal diameter commonly includes specifications such as DN15-DN300; the nominal pressure is generally PN16-PN250; the applicable temperature range varies by material, approximately -20℃ to 425℃ (carbon steel) -196℃ to 540℃ (stainless steel).

The fixed welded ball- Application fields: Widely used in petrochemical, natural gas transmission, electric power, metallurgy other industries, for controlling the on-off of media such as crude oil, natural gas, steam, high-temperature oil products.