Q61N三段式焊接球阀它具有旋转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。

       Q61N三段式焊接球阀的主体和附件都是锻造后再精加工，可以做硬密封也可以做软密封。硬密封耐压42MPa,耐温630℃，软密封可以根据用户需要做成耐温80℃ 150℃和250℃，耐压高可以到200MPa.可以安装气动 电动 液动等执行机构。Q61N三段式焊接球阀本身结构紧凑，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。

Q61N三段式焊接球阀优点：

       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。

       3．紧密度好。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。

三段式焊接球阀

三段式焊接球阀是一种采用三段式阀体结构、通过焊接方式与管道连接的球阀，兼具结构灵活性与连接密封性，广泛应用于石油、化工、天然气等行业的中高压管道系统，尤其适合需要长期稳定密封的场合。

三段式焊接球阀- 结构特点：阀体由左阀体、中阀体、右阀体三部分组成，通过螺栓紧固连接为整体，便于拆卸维修和内部部件更换；两端采用对焊或承插焊接口，与管道直接焊接，连接强度高且密封性能，可有效避免介质泄漏；球体、阀座等核心部件多采用不锈钢等耐腐蚀材料，阀座密封件选用聚四氟乙烯或金属材料，适配不同压力和温度工况；整体结构紧凑，流道为全通径设计，流体阻力小。

三段式焊接球阀- 工作原理：通过旋转阀杆带动球体旋转90°实现启闭。当球体通孔与管道通道中心线重合时，阀门全开，介质畅通；旋转90°后，通孔与通道完全错开，球体与阀座紧密贴合，截断介质流动。操作轻便，可配合手动或电动执行器，满足快速启闭需求。

三段式焊接球阀- 性能优势：三段式结构设计使维修便捷，无需整体拆卸管道即可更换密封件或球体，降低维护成本；焊接连接确保系统整体性强，抗振动性能好，适合高压（通常PN16-PN100）工况；密封度好，全通径设计减少介质输送压力损失，提升流通效率；耐温范围广（-40℃至350℃，随材质变化），可适应多种介质（如水、油、气体、腐蚀性流体等）。

三段式焊接球阀- 适用范围：公称通径一般为DN15-DN300，适用于长输管道、储罐出口、工艺装置等关键节点，广泛应用于石油炼化、天然气输送、城市供热等领域，用于介质的截断、接通或流向控制。

Three-piece welded ball valve is a type of ball valve with a three-piece valve body structure, connected to pipelines by welding. It combines structural flexibility connection tightness, is widely used in medium high-pressure pipeline systems in petroleum, chemical, natural gas other industries, especially suitable for occasions requiring long-term reliable sealing.

Three-piece welded ball valve- Structural features: The valve body consists of three parts: left valve body, middle valve body right valve body, which are fastened into a whole by bolts, facilitating disassembly, maintenance replacement of internal components. Both ends adopt butt-weld socket-weld interfaces, welded directly to the pipeline, ensuring high connection strength excellent sealing performance to effectively prevent medium leakage. Core components such as the ball valve seat are mostly made of corrosion-resistant materials like stainless steel; the valve seat seal is made of PTFE metal materials, adapting to different pressure temperature conditions. The overall structure is compact, with a full-bore flow channel design, resulting in low fluid resistance.

Three-piece welded ball valve- Working principle: The valve is opened closed by rotating the valve stem to drive the ball to rotate 90°. When the through-hole of the ball coincides with the center line of the pipeline channel, the valve is fully open, allowing unobstructed medium flow; after rotating 90°, the through-hole is completely staggered the channel, the ball fits tightly with the valve seat to cut off medium flow. It is easy to operate can be equipped with manual electric actuators to meet the needs of quick opening closing.

Three-piece welded ball valve- Performance advantages: The three-piece structure design enables convenient maintenance—seals balls can be replaced without overall disassembly of the pipeline, reducing maintenance costs. Welded connection ensures strong system integrity good anti-vibration performance, suitable for high-pressure (usually PN16-PN100) working conditions. It features reliable sealing; the full-bore design reduces pressure loss in medium transportation improves circulation efficiency. It has a wide temperature resistance range (-40℃ to 350℃, varying with materials) can adapt to various media (such as water, oil, gas, corrosive fluids, etc.).

Three-piece welded ball valve- Scope of application: The nominal diameter is generally DN15-DN300. It is suitable for key nodes such as long-distance pipelines, storage tank outlets, process equipment, is widely used in petroleum refining, natural gas transportation, urban heating other fields for cutting off, connecting controlling the flow direction of media.