角式针型阀

鑫盛源角式针型阀优点：

      1、两截阀杆设计，上阀杆螺纹淡化工艺处理

      2、下阀杆表经经滚压硬化处理上阀杆螺纹的润滑脂与系统介质隔离

      3、无旋转的下阀杆垂直运动代替旋转升降，减少阀杆行程对填料的磨擦，手感更轻便

      4、阀门在全开位置具有背密封功能

      5、可安装手柄或者手轮操作，稳固耐用多种颜色手柄可供选择

      6、每只阀门在出厂前均按设计压力的1.1倍进行氮气密封测试,并按额定工作压力的1.5倍水压进行壳体强度测试

角式针型阀

角式针型阀是一种特殊结构的阀门，其工作原理基于截止阀的设计，但通过独特的直角结构和针形阀芯实现流量控制与密封。

1. 基本工作原理

角式针型阀通过阀芯（针形圆锥体）的升降运动控制流体通断或调节流量。阀芯沿流体中心线移动，旋转手轮时，阀杆带动针形阀芯与阀座的锥面密封接触或分离：

关闭状态：顺时针旋转手轮，阀芯下压与阀座紧密贴合，形成锥面密封，完全阻断流体。

开启状态：逆时针旋转手轮，阀芯上升，形成微小间隙，流体通过间隙流动，流量随开度增大而增加。

2. 结构特性

直角设计：进出口呈90°直角，适合空间受限或需要改变流向的管路布局，减少弯头使用。

针形阀芯：锥度通常为5°~30°，细长设计可实现微米级流量调节，适用于高压、小流量场景（如0.1mL/min）。

密封形式：采用金属硬密封（如不锈钢）或软密封材料（PTFE、石墨），确保高压（可达26.5MPa）和腐蚀性介质下的零泄漏。

3. 操作与性能优势

升降旋转杆式：手轮与阀杆同步旋转升降，螺母固定于阀体，操作轻便且扭矩低。

双重密封系统：部分型号配备填料密封（如石墨）和O型圈，防止阀杆泄漏并抵抗振动松脱。

耐压与耐温：阀体材质可选316不锈钢、哈氏合金等，工作温度范围广（-45°C至450°C），适用于高温蒸汽、酸碱介质等苛刻环境。

4. 应用场景

高压系统：如石油化工的仪表管路（6000PSI）、电力锅炉给水控制。

精密控制：实验室设备（气相色谱仪）、半导体制造（高纯气体调节）。

安全需求：防火防爆设计，适用于煤气、天然气等危险介质管路。

总结

角式针型阀通过直角结构、针形阀芯和锥面密封的协同作用，实现了高精度流量调节和稳定密封，尤其适合高压、小流量及复杂安装条件的工业场景。其模块化设计和耐腐蚀材质进一步延长了使用寿命，降低了维护成本。

Working Principle of Angle Needle Valve

The angle needle valve is a specially designed valve based on the globe valve concept, featuring a unique right-angle structure  a needle-shaped plug to achieve precise flow control  sealing. Below is a detailed analysis of its core principles  characteristics:

1. Basic Working Principle

The angle needle valve controls fluid flow by the vertical movement of its plug (a conical needle). When the handwheel is rotated, the stem drives the needle-shaped plug to either engage  disengage  the valve seat’s conical sealing surface:

Closed State: Rotating the handwheel clockwise presses the plug downward, creating a tight seal against the valve seat  completely blocking fluid flow.

Open State: Rotating the handwheel counterclockwise lifts the plug, creating a fine gap for fluid passage. Flow rate increases with the degree of opening.

2. Structural Features

Right-Angle Design: The inlet  outlet ports are arranged at a 90° angle, making it suitable for confined spaces  piping layouts requiring directional changes, reducing the need for additional elbows.

Needle-Shaped Plug: The plug has a fine taper (typically 5°–30°), enabling micrometer-level flow regulation, ideal for high-pressure, low-flow applications (e.g., 0.1 mL/min).

Sealing Mechanism: Utilizes metal-to-metal hard sealing (e.g., stainless steel)  soft sealing materials (PTFE, graphite), ensuring zero leakage under high pressure (up to 26.5 MPa)  corrosive conditions.

3. Operation & Performance Advantages

Rotating Rising Stem: The handwheel  stem rotate together while lifting, with a fixed nut in the valve body, ensuring smooth operation with low torque.

Dual Sealing System: Some models incorporate packing seals (e.g., graphite)  O-rings to prevent stem leakage  resist vibration loosening.

Pressure & Temperature Resistance: Valve body materials (e.g., 316 stainless steel, Hastelloy) support a wide temperature range (–45°C to 450°C), making them suitable for harsh environments like steam systems  chemical processing.

4. Applications

High-Pressure Systems: Instrumentation lines in petrochemical plants (6000 PSI), boiler feedwater control in power plants.

Precision Control: Laboratory equipment (gas chromatographs), semiconductor manufacturing (high-purity gas regulation).

Safety-Critical Uses: Fireproof  explosion-proof designs for hazardous media (e.g., natural gas pipelines).

Summary

The angle needle valve combines a right-angle structure, needle-shaped plug,  conical sealing to deliver precise flow regulation  reliable sealing, particularly suited for high-pressure, low-flow,  complex installation scenarios. Its modular design  corrosion-resistant materials enhance durability while minimizing maintenance costs.

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