低温紧急切断阀

低温紧急切断阀是一种专为深冷介质设计的特种安全阀门，采用气动/液动执行机构驱动，可在-196℃超低温环境下实现毫秒级快速切断。该产品通过权威SIL3安全认证，是LNG储运、空分设备、低温化工等领域的核心安全装置。

低温紧急切断阀核心技术特点：

超低温适应性

阀体采用ASTM A351 CF8M深冷处理

超低温延伸阀杆设计（-196℃～+80℃）

真空夹套防结冰结构

毫秒级切断性能

快速切断时间≤100ms

双作用气缸/液压缸驱动

爆破膜片式紧急触发装置

低温紧急切断阀零泄漏密封系统

金属波纹管+石墨复合密封

双向金属硬密封（DBB结构）

泄漏等级达到ISO 15848微泄漏A级

低温紧急切断阀多重安全保护

机械式强制复位装置

防火防静电设计（API 607+API 6FA）

 防爆等级Ex dⅡCT6 Gb

低温紧急切断阀智能监控功能

阀位反馈信号（4-20mA）

切断动作计数器

低温紧急切断阀支持MODBUS RTU远程监控

关键术语对照表：

中文English深冷处理Cryogenic treatment双向截断排放Double Block & Bleed (DBB)波纹管密封Bellows seal强制复位Forced-reset爆破膜片Rupture disc微泄漏等级Micro-leakage class

注：本产品符合BS 6364低温阀门标准，可选配液氮冷却测试报告。阀体材料可根据工况选用Monel、Inconel等特种合金。

Cryogenic Emergency Shut-off Valve Product Overview

The cryogenic emergency shut-off valve is a specialized safety valve designed for ultra-low temperature service, featuring pneumatic/hydraulic actuation for millisecond-level fast closure at -196℃. Certified to SIL3 safety integrity level, it serves as critical safety equipment in LNG storage, air separation units cryogenic chemical processes.

Core Technical Features:

Ultra-low Temperature Adaptability

ASTM A351 CF8M cryogenically treated body

Extended stem design (-196℃～+80℃)

Vacuum-jacketed anti-icing structure

Millisecond Response

Fast closure time ≤100ms

Double-acting pneumatic/hydraulic actuator

Rupture disc emergency trigger

 Zero-Leakage Sealing

Metal bellows + graphite composite seal

Bidirectional metal hard seal (DBB)

ISO 15848 micro-leakage Class A

Multi-level Safety

Mechanical forced-reset device

Fire-safe & anti-static (API 607+API 6FA)

Explosion-proof Ex dⅡCT6 Gb

Smart Monitoring

Position feedback (4-20mA)

Cycle counter

MODBUS RTU remote monitoring