J41B氨用截止阀
J41B氨用截止阀产品概述（中英文）
J41B氨用截止阀是一种专为氨气、液氨等介质设计的阀门，广泛应用于制冷、化工、石油、食品等行业。该阀门采用耐腐蚀钢材质，可有效抵抗氨介质的腐蚀，适用温度范围为-40℃至150℃。其结构特点包括方形中通法兰、间杆连接的阀杆设计，以及球凸状阀体密封面与阀脚的线吻合密封，确保良好的密封性能和使用寿命。密封面材料选用巴氏合金或聚四氟乙烯，进一步提升了密封可靠性和耐用性。阀门适用于城市燃气、液化气等管道系统，也可用于炼油厂、化工厂的冷却系统，作为控制介质截止的启闭装置。1212
The J41B ammonia globe valve is specifically designed for ammonia gas, liquid ammonia, and other media, widely used in refrigeration, chemical, petroleum, and food industries. The valve is made of corrosion-resistant steel, effectively resisting ammonia corrosion, with an operating temperature range of -40℃ to 150℃. Its structural features include a square intermediate flange, a stem connected by intermediate rods, and a spherical convex valve body sealing surface that forms linear contact with the valve seat, ensuring excellent sealing performance and service life. The sealing surface materials use Babbitt alloy or PTFE, further enhancing sealing reliability and durability. The valve is suitable for urban gas and liquefied petroleum gas pipeline systems, as well as cooling systems in refineries and chemical plants, serving as a shut-off device for medium control. 192328
产品结构与工作原理（中英文）
J41B氨用截止阀的阀体结构分为直通式、直流式和直角式三种，其中直角式多采用锻造工艺，适用于小口径高压场合。阀门启闭件为塞形阀瓣，密封面呈平面或锥面，阀瓣沿流体中心线作直线运动实现启闭。阀杆设计有升降杆式和升降旋转杆式两种形式，操作轻便可靠。阀门采用榫槽密封结构的中法兰和多级聚四氟乙烯填料密封，即使在压力波动情况下也能保证密封可靠性。其工作原理是通过顺时针旋转手轮使阀杆下移，阀瓣下降实现密封；逆时针旋转则开启阀门，介质可通过。3820
The J41B ammonia globe valve body comes in three structures: straight-through, straight-flow, and angle types, with the angle type often forged and suitable for small-bore high-pressure applications. The valve s opening/closing element is a plug-shaped disc with flat or conical sealing surfaces that move linearly along the fluid centerline. The stem has two designs: rising stem and rising-rotating stem, both ensuring easy and reliable operation. The valve features a tongue-and-groove sealed intermediate flange and multi-stage PTFE packing seals, maintaining sealing reliability even under pressure fluctuations. Its working principle involves clockwise handwheel rotation to lower the stem and close the valve, while counterclockwise rotation opens the passage for media flow. 141622
产品特点与优势（中英文）
J41B氨用截止阀具有多项设计优势：密封副采用球面与平面配对结构，可实现自动补偿密封，形成双重保险；阀体材料添加耐蚀合金元素，解决了普通阀门壳体易穿孔的问题；密封面采用巴氏合金或四氟材料，摩擦系数小，使用寿命长；阀杆行程较短，具有快速切断功能。阀门在温差变化大的环境下仍能保持良好的化学处理性能，特别适合氨制冷系统中介质流动通道的接通和切断。其紧凑的设计、流畅的通道和低流阻系数，使其在食品、制药等行业得到广泛应用。4715
The J41B ammonia globe valve offers several design advantages: the spherical-to-flat sealing pair enables automatic compensation for dual protection; the valve body material with corrosion-resistant alloy elements solves the common problem of shell perforation; Babbitt alloy or PTFE sealing surfaces provide low friction coefficients and long service life; the short stem stroke allows quick shut-off. The valve maintains good chemical processing performance even under large temperature variations, making it particularly suitable for connecting and cutting off media flow in ammonia refrigeration systems. Its compact design, smooth passage, and low flow resistance coefficient have led to widespread use in food, pharmaceutical, and other industries. 5917
应用领域与注意事项（中英文）
J41B氨用截止阀主要应用于液化天然气、液氨、煤气等低温介质的输送系统，包括冷冻冷藏、石油化工、冶金等领域。在使用过程中需注意：安装前应检查连接规格是否匹配，保持连接面清洁；严禁接触油脂类物质；停止工作时需排净阀内余气，避免弹性元件长期受压变形；运输储存时应防止撞击振动，远离腐蚀性环境。阀门不适用于含固体颗粒或高粘度介质，在特殊工况下需提供详细参数进行定制设计。61013
The J41B ammonia globe valve is mainly used in transportation systems for liquefied natural gas, liquid ammonia, coal gas, and other cryogenic media, including refrigeration, petrochemical, and metallurgical industries. Usage precautions include: checking connection specifications before installation and keeping connecting surfaces clean; strictly avoiding contact with greasy substances; venting residual gas when not in use to prevent long-term pressure on elastic elements; preventing impact and vibration during transportation/storage, and keeping away from corrosive environments. The valve is not suitable for media containing solid particles or with high viscosity, and custom design may be required for special working conditions with detailed parameters provided. 111821
J41B氨用截止阀
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