产品详情：

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。低温高压截止阀一般用于低温储罐的出液口和进液口，因为低温储罐内的介质温度极低，温度在短时间内容易传到至手柄的顶端，所以，接触低温液体面积较大的部位管路采用低温长轴截止阀。

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：

低温高压截止阀

低温高压截止阀是一种专门设计用于极低温度（通常指-46°C / -50°F 以下）和高工作压力工况的特殊阀门。其核心功能是切断或调节液化天然气（LNG）、液氮（LIN）、液氧（LOX）、液氩（LAR）及其他低温介质的流动，确保在深冷和高压条件下实现零泄漏和安全运行。

低温高压截止阀采用特殊材料、结构设计和制造工艺，以应对低温带来的材料脆化、密封失效以及保冷等挑战，是空分、液化天然气（LNG）、石化及工业气体等领域的关键设备。

Product Overview of a Cryogenic & High-Pressure Globe Valve

A Cryogenic & High-Pressure Globe Valve is a specialty valve meticulously engineered for services involving extremely low temperatures (typically below -46°C / -50°F)  high working pressures. Its core function is to reliably shut off  regulate the flow of cryogenic media such as liquefied natural gas (LNG), liquid nitrogen (LIN), liquid oxygen (LOX), liquid argon (LAR),  others, ensuring bubble-tight shut-off  safe operation under deep cryogenic  high-pressure conditions.

This valve incorporates special materials, structural designs,  manufacturing processes to address challenges posed by cryogenic temperatures, including material embrittlement, seal failure,  thermal insulation. It is critical equipment in industries like air separation, liquefied natural gas (LNG), petrochemical,  industrial gases.

低温高压截止阀核心特点与功能 (Key Features  Functions)

低温高压截止阀低温材料选择 (Cryogenic Material Selection)

阀体与内件: 主要材质通常选用奥氏体不锈钢（如304、304L、316、316L），因其在低温下具有良好的韧性且不易发生脆性断裂。对于更低温或特殊工况，可选用铝合金、蒙乃尔合金（Monel）或9镍钢。

密封件: 采用特殊处理的柔性石墨、PTFE或金属密封，确保在低温下的密封性能和稳定性。

低温高压截止阀长颈阀盖设计 (Extended Bonnet Design)

低温高压截止阀核心设计: 这是低温阀门的标志性特征。通过一个加长的颈部，将阀杆填料函远离低温流道。

低温高压截止阀功能目的:

保护填料: 使填料函工作在接近环境温度的区域，防止填料因低温而硬化、收缩，从而失去密封效果。

防止结霜: 减少冷量向外部传递，避免阀门操作部件被冻结，同时防止阀门外表面结霜，确保操作安全。

低温高压截止阀高压密封结构 (High-Pressure Sealing Structure)

锥形密封面: 截止阀的阀瓣与阀座通常采用锥形或平面密封设计，提供金属对金属的线密封或面密封，在高压力差下仍能实现严密关闭。

波纹管密封: 对于极度危险或要求零外漏的介质，可选配波纹管密封（Bellows Seal） 作为首要或次要密封，彻底消除阀杆处的泄漏风险。

低温高压截止阀安全与工艺设计 (Safety  Process Design)

防火设计: 许多设计符合防火安全标准（API 607/API 6FA），在火灾情况下仍能保持一定时间的密封性。

低温高压截止阀双向流动: 通常标明流向（如“低进高出”），安装时必须遵循，以利用介质压力实现更好的密封并降低操作力矩。

低温高压截止阀广泛应用 (Wide Application)

行业: 液化天然气（LNG）接收站与储运、空分设备、石油化工、工业气体生产与储存。

工况: 用于装车、装船、储罐切换及工艺管道上，作为关键切断阀或调节阀。

低温高压截止阀总结 (Summary)

低温高压截止阀是技术和材料工艺的高度结合体。其长颈阀盖、特殊的低温材料和完善的密封设计共同确保了它在极端工况下的稳定性和安全性。选型时需严格关注设计温度、压力等级、材料兼容性及密封要求。

Key Features  Functions:

Cryogenic Material Selection

Body & Trim: Primary materials are typically austenitic stainless steels (e.g., SS304, 304L, 316, 316L) due to their excellent toughness  resistance to brittle fracture at low temperatures. For lower temperatures  specific services, aluminum alloys, Monel,  9% nickel steel may be used.

Sealing Elements: Employ specially treated flexible graphite, PTFE,  metal seals to ensure reliable sealing performance at cryogenic temperatures.

Extended Bonnet Design

Core Feature: This is the hallmark design of cryogenic valves. It features an elongated neck that positions the stem packing box away  the cold flow path.

Purpose:

Protects Packing: Keeps the packing box at a temperature closer to ambient, preventing the packing  hardening  shrinking due to cold, which would compromise its seal.

Prevents Frosting: Minimizes heat transfer (cold escape) to the exterior, preventing the operating mechanism  freezing  avoiding frost formation on the external surface for safe operation.

High-Pressure Sealing Structure

Tapered Seat Design: The disc  seat of the globe valve typically employ a tapered  flat seal design, providing metal-to-metal line  face contact to achieve a tight shut-off even under high pressure differentials.

Bellows Seal Option: For extremely hazardous  zero-emission applications, a Bellows Seal can be provided as the primary  secondary seal,彻底消除阀杆处的泄漏风险 (eliminating the risk of leakage along the stem).

Safety  Process Design

Fire-Safe Design: Many designs comply with fire safety standards (API 607/API 6FA), maintaining a seal for a specified duration in the event of a fire.

Bi-Directional Flow: Flow direction is typically marked (e.g., flow under the disc). Installation must follow this direction to utilize media pressure for better sealing  lower operating torque.

Wide Application

Industries: LNG terminals  transportation, air separation units, petrochemical plants, industrial gas production  storage.

Services: Used as critical isolation  regulation valves for loading/unloading (trucks, ships), tank switching,  on process lines.