LNG低温高压截止阀

LNG低温高压截止阀是专门用于液化天然气（LNG）输送系统的关键控制设备，采用上升阀杆非旋转设计，通过平面或锥面密封实现稳定关断。该阀门在-196℃极低温度和高压工况（Class 600以上）下具有密封性能和操作稳定性，是LNG储运系统中不可或缺的重要部件。

LNG低温高压截止阀核心特点：

低温密封稳定

采用深冷处理奥氏体不锈钢阀瓣/阀座

波纹管+填料双重密封结构

密封性能达到ISO 5208泄漏等级A级

LNG低温高压截止阀高压适应设计

锻钢阀体，压力等级Class 600-1500

倾斜阀座设计，降低操作扭矩

防喷出阀杆结构（API 602标准）

低温特殊结构

加长阀盖设计（标准延伸250mm）

真空隔热阀盖可选

防冷凝排水装置

操作稳定性

低摩擦填料系统（Graphite+PTFE）

明杆设计，阀位可视

手轮带限位锁紧装置

LNG低温高压截止阀典型应用：

LNG接收站高压输出管道

LNG罐车装卸系统

液化工厂高压液体管路

空分设备液氧/液氮管道

航天燃料加注系统

Product Overview of LNG Cryogenic High-Pressure Globe Valves

LNG Cryogenic High-Pressure Globe Valves are critical control devices specifically designed for liquefied natural gas (LNG) transmission systems. Featuring a non-rotating rising stem design with flat  conical sealing surfaces, these valves provide reliable shut-off capability under extreme conditions of -196℃  high pressure (Class 600  above), making them essential components in LNG storage  transportation systems.

Key Features:

Cryogenic Sealing Assurance

Deep-cryo treated austenitic stainless steel disc/seat

Bellows + packing double sealing structure

Sealing performance meets ISO 5208 Leakage Class A

High-Pressure Adaptation

Forged steel body, pressure Class 600-1500

Inclined seat design reduces operating torque

Anti-blowout stem design (API 602 standard)

Cryogenic Special Structures

Extended bonnet design (standard 250mm extension)

Vacuum-insulated bonnet optional

Anti-condensation drainage device

Operational Reliability

Low-friction packing system (Graphite+PTFE)

Rising stem design for visual position indication

Handwheel with limit locking device

Typical Applications:

LNG terminal high-pressure output pipelines

LNG tanker loading/unloading systems

High-pressure liquid lines in liquefaction plants

Liquid oxygen/nitrogen pipelines in air separation units

Aerospace propellant loading systems

Technical Specifications:

Size Range: DN15-DN200

Pressure Class: Class 600-1500

Temperature Range: -196℃ to +80℃

Connection Types: RF flange, BW, SW

Operation: Manual, gear operated, pneumatic actuator

Compliance Standards:

Design: BS 6364, API 602

Fire Safety: API 607

Testing: ISO 5208

Materials: NACE MR0175 compliant