DJ61Y低温高压截止阀应用于气体液化设备、空分设备；天然气液化、储运设备；液态氧、氮、氩、氢、二氧化碳低温贮槽及槽车；变压吸附制氧、氮设备。 适用LO2、LN2、LNG、LC2H4、液氮、液氧等低温-196～80℃；压力在0.6～42MPa；通径DN6～50mm的情况下使用。

DJ61Y低温高压截止阀结构特点：

      1、结构简单，制造和维修比较方便；

      2、工作行程小，启闭时间短；

      3、密封性好，密封面间磨擦力小，寿命较大；

      4、流体阻力大，开启和关闭时所需力较大；

      5、不适用于带颗粒、粘度较大、易结焦的介质；

      6、调节性能较差。

      DJ61Y低温高压截止阀产品性能参数：

DJ61Y低温高压截止阀产品主要零件材料：

DJ61Y低温高压截止阀产品主要尺寸：

低温截止阀

低温截止阀是专门设计用于低温介质（如液氮、液氧、液化天然气（LNG）、液氩等）的特种阀门。其工作温度通常低于-40°C，甚至可低至-196°C。这类阀门在材料选择、结构设计、密封和保温方面有特殊要求，以确保在深冷环境下能够安全稳定地运行，防止介质泄漏和阀门操作机构失效。

低温截止阀核心特点：

深冷材料处理：阀体、阀盖等主要部件采用耐低温的奥氏体不锈钢（如304、316L）或低温碳钢，这些材料在低温下仍能保持良好的韧性和强度，防止发生冷脆现象。

加长阀盖设计：这是明显外部特征。阀盖被明显加长，形成一个“冷箱”（Cold Box）。其目的是使阀杆填料函远离低温介质，让填料函的温度保持在0°C以上，防止其冻结，确保阀杆能够正常操作，并便于保温处理。

低温截止阀特殊密封设计：阀瓣与阀座的密封面常采用金属对金属的硬密封，或采用在低温下仍能保持弹性的特殊材料（如改性PTFE），确保密封的稳定性。

防泄漏与保温：所有密封环节都经过特殊设计，防止低温介质外漏。阀门通常与管道一起被包在保冷箱中，以减少冷量损失。

严格制造与检验：制造过程需遵循严格的低温阀门标准，并进行深冷处理（低温浸泡试验）和压力测试，以验证其在工况下的性能。

低温截止阀主要应用领域：

液化天然气（LNG）的储存、运输和再气化装置

空分设备（制氧、制氮设备）

低温液体储罐（液氮、液氧、液氩）的输送系统

石化行业中的乙烯、丙烯等低温介质装置

低温截止阀产品名称：

中文： 低温截止阀

英文： Cryogenic Globe Valve 或 Low-Temperature Globe Valve

Cryogenic Globe Valve

A Cryogenic Globe Valve is a specialized type of globe valve designed for use in low-temperature media services, such as liquid nitrogen, liquid oxygen, liquefied natural gas (LNG), liquid argon. Their operating temperatures are typically below -40°C can extend down to -196°C. These valves feature unique requirements in material selection, structural design, sealing, insulation to ensure safe reliable operation in deep cryogenic environments, preventing media leakage operational failure.

Key Features:

Cryogenic Materials: Primary components (body, bonnet) are constructed austenitic stainless steel (e.g., SS304, SS316L) low-temperature carbon steel, which retain excellent toughness strength at cryogenic temperatures to prevent brittle fracture.

Extended Bonnet (Stem Extension): This is the most distinctive external feature. The bonnet is significantly elongated to create a "cold box." This design keeps the stem packing away the cryogenic fluid, ensuring the packing temperature remains above 0°C to prevent freezing, allowing normal stem operation, facilitating easy insulation.

Specialized Sealing: The disc seat sealing surfaces often employ metal-to-metal hard sealing use special resilient materials (e.g., modified PTFE) that maintain elasticity at low temperatures to ensure reliable shut-off.

Leak Prevention & Insulation: All sealing points are specially designed to prevent leakage of the cryogenic medium. The valve is typically insulated within a cold box along with the piping to minimize cold loss.

Stringent Manufacturing & Testing: Manufacturing follows strict cryogenic valve standards. Each valve undergoes deep cryogenic treatment ( immersion testing) pressure tests to verify its performance under actual operating conditions.

Primary Applications:

 Liquefied Natural Gas (LNG) storage, transportation, regasification facilities

Air separation plants (for producing oxygen, nitrogen)

Transfer systems for cryogenic liquid storage tanks (LN₂, LO₂, LAr)

Petrochemical plants handling ethylene, propylene, other cryogenic media

关键术语：

低温/深冷: Cryogenic

加长阀盖: Extended Bonnet / Lengthened Bonnet

奥氏体不锈钢: Austenitic Stainless Steel

冷脆: Brittle Fracture

深冷处理: Cryogenic Treatment / Deep Freeze Testing