


高压气动截止阀
高压气动截止阀是一种专为高压工况设计的强制密封式阀门,采用气动执行机构驱动,适用于石油、化工、电力等行业的高压管路系统(压力可达PN420/Class 2500)。该产品采用自增强阀体结构和锥面硬密封技术,确保在极端压力下的零泄漏性能,同时具备快速切断调节功能。
高压气动截止阀核心优势
✔ 超高压设计——阀体采用整体锻造工艺,通过有限元分析(FEA)优化,耐压等级达PN420(Class 2500)
✔ 双重密封保障——金属硬密封(主密封)+ PTFE辅助密封结构,泄漏等级达API 598 Class VI
✔ 低操作扭矩——特殊设计的阀杆螺纹角度(15°)和导向结构,比常规截止阀降低40%操作力
✔ 智能控制集成——可选配智能定位器(支持PROFIBUS DP通讯),实现0.5%的调节精度
✔ 极端工况适应——阀盖加长设计(适用于-196℃~550℃),符合BS 1873高压截止阀标准
高压气动截止阀技术参数
压力等级:PN160-PN420(Class 900-2500)
温度范围:-196℃~+550℃(根据密封材料可选)
公称通径:DN15-DN150(NPS ½"-6")
连接方式:RF/RTJ法兰(ASME B16.5)、对焊端(BW)
阀体材质:A105、F11、F316H(按ASTM标准)
密封材料:司太立合金堆焊(Stellite 6)/柔性石墨
执行机构:双作用/弹簧复位气缸(工作压力0.4-0.7MPa)
开关时间:≤3秒(DN50规格)
高压气动截止阀典型应用
石油裂解装置高压蒸汽系统
合成氨工厂高压合成回路
超临界水氧化(SCWO)设备
高压氢气压缩输送系统
高压气动截止阀,注:
高压气动截止阀,"截止阀" 严格译为 "Globe Valve"(区别于gate valve)
高压气动截止阀技术标准 采用通用缩写(API/BS/ASTM)
材料工艺 使用专业术语(如Stellite 6 hardfacing)
智能功能 标注工业协议(PROFIBUS DP)
极端工况 使用 "material dependent" 专业表述
High-Pressure Pneumatic Globe Valve Product Overview
Product Description
The High-Pressure Pneumatic Globe Valve is a forced-seal valve specifically engineered for high-pressure pipelines (up to PN420/Class 2500), featuring pneumatic actuation for critical applications in petroleum, chemical, power industries. With self-reinforced body construction conical hard-sealing technology, it guarantees zero-leakage performance under extreme pressures while providing quick shut-off precise regulation.
Key Features
✔ Ultra-high pressure resistance – Forged monoblock body optimized by FEA analysis, rated to PN420 (Class 2500)
✔ Dual sealing system – Metal-to-metal primary seal + PTFE secondary seal (API 598 Class VI)
✔ Reduced operating torque – 15° stem thread angle guided stem design (40% lower force than standard globes)
✔ Smart control ready – Optional smart positioner (PROFIBUS DP compatible) with 0.5% control accuracy
✔ Extreme service proven – Extended bonnet design (-196℃~550℃), compliant with BS 1873 HP globe valve standard
Technical Specifications
Pressure rating: PN160-PN420(Class 900-2500)
Temperature range: -196℃~+550℃(material dependent)
Nominal size: DN15-DN150(NPS ½"-6")
Connections: RF/RTJ flange(ASME B16.5), Buttweld(BW)
Body materials: A105, F11, F316H(per ASTM)
Sealing materials: Stellite 6 hardfacing/Flexible graphite
Actuator: Double-acting/Spring-return cylinder(0.4-0.7MPa air supply)
Stroke time: ≤3 seconds(DN50 size)
Typical Applications
High-pressure steam systems in oil cracking units
Synthesis loops in ammonia plants
Supercritical Water Oxidation (SCWO) equipment
High-pressure hydrogen compression & transfer
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