截止阀的启闭件是塞形的阀瓣，密封面呈平面或锥面，阀瓣沿流体的中心线作直线运动。这种“直线运动”的设计，让截止阀在所有阀门中拥有非常可靠的密封性能——阀瓣越往下压，密封越紧。与闸阀相比，截止阀的结构更简单、维修更方便；与球阀相比，截止阀的密封更可靠、更适合需要频繁启闭的场合。

The opening and closing component of a globe valve is a plug shaped valve disc, with a flat or conical sealing surface. The valve disc moves in a straight line along the centerline of the fluid. This "linear motion" design allows the globe valve to have the most reliable sealing performance among all valves - the tighter the seal the valve disc presses downwards. Compared with gate valves, globe valves have a simpler structure and are easier to maintain; Compared with ball valves, globe valves have more reliable sealing and are more suitable for situations that require frequent opening and closing.

良工截止阀的核心技术优势体现在密封可靠性、结构简单性和工况适应性三个方面。以J41H-16C为例，该型号为法兰连接截止阀，密封面堆焊硬质合金（H），公称压力1.6MPa（16），阀体材质为碳钢（C），口径覆盖DN15至DN350。工作温度范围-29～550℃，适用于石油、化工、制药、化肥、电力行业等各种工况。

The core technological advantages of Lianggong globe valves are reflected in three aspects: sealing reliability, structural simplicity, and adaptability to working conditions. Taking J41H-16C as an example, this model is a flange connected globe valve, with a sealing surface welded with hard alloy (H), a nominal pressure of 1.6MPa (16), a valve body material of carbon steel (C), and a diameter covering DN15 to DN350. The working temperature range is -29 to 550 ℃, suitable for various working conditions in industries such as petroleum, chemical, pharmaceutical, fertilizer, and power.

良工截止阀的主流产品系列

The mainstream product series of Lianggong globe valves

J41H系列法兰截止阀是良工截止阀的“拳头产品”。该系列采用法兰连接方式，阀体材质为铸钢，密封面堆焊硬质合金，适用于公称压力PN1.6～16MPa、工作温度-29～550℃的石油、化工、制药、化肥、电力行业等各种工况。口径覆盖DN15至DN350。

J41H series flange globe valve is the "flagship product" of Lianggong globe valve. This series adopts flange connection method, the valve body material is cast steel, and the sealing surface is welded with hard alloy. It is suitable for various working conditions such as petroleum, chemical, pharmaceutical, fertilizer, and power industries with nominal pressure PN1.6~16MPa and working temperature -29~550 ℃. The caliber covers DN15 to DN350.

活塞式截止阀（UJ41H） 是良工截止阀的创新产品。它针对传统截止阀、闸阀、球阀、柱塞阀在生产技术及应用过程中存在的缺陷而研制开发，是机械阀门技术领域更新换代的一种节能与环保创新产品。该阀门的实用新型在于阀体和阀盖紧配，阀杆上端通过螺母连接手轮，下端连接活塞，活塞与环形阀座相应配合。公称压力覆盖1.6~6.4MPa，适用温度≤250~300℃。

The piston type globe valve (UJ41H) is an innovative product of Lianggong globe valve. It is developed to address the shortcomings of traditional globe valves, gate valves, ball valves, and plunger valves in production technology and application processes. It is an energy-saving and environmentally friendly innovative product that has been updated and replaced in the field of mechanical valve technology. The utility model of this valve lies in the tight fit between the valve body and the valve cover. The upper end of the valve stem is connected to the handwheel through a nut, and the lower end is connected to the piston. The piston is correspondingly matched with the annular valve seat. The nominal pressure covers 1.6~6.4MPa, and the applicable temperature is ≤ 250~300 ℃.

日标截止阀按照JIS标准设计制造，阀体材料包括SCPH2-11、SCS13A、SCS14A等，适用温度从-45℃到540℃。适用于水、蒸汽、油品、硝酸类、醋酸类等多种介质。

The Japanese standard globe valve is designed and manufactured according to JIS standards, with valve body materials including SCPH2-11, SCS14A, SCS14A, etc., suitable for temperatures ranging from -45 ℃ to 540 ℃. Suitable for various media such as water, steam, oil, nitric acid, acetic acid, etc.

焊接截止阀（J61Y） 专为火电站等高温高压工况设计，公称压力PN20～32MPa，工作温度≤540℃（其中P57/17V工作温度为570℃），适用于各种高温高压系统的管道。

The welding globe valve (J61Y) is designed specifically for high temperature and high pressure conditions in thermal power plants, with a nominal pressure of PN20-32MPa and a working temperature of ≤ 540 ℃ (of which P57/17V has a working temperature of 570 ℃). It is suitable for pipelines in various high temperature and high pressure systems.

截止阀选型的5个核心要点

5 core points for selecting globe valves

1. 介质特性——清洁介质与含固体颗粒的介质对密封面的要求不同。截止阀只适用于全开和全关，不允许作调节和节流。

1. Media characteristics - Clean media and media containing solid particles have different requirements for sealing surfaces. Globe valves are only suitable for fully open and fully closed, and are not allowed to be adjusted or throttled.

2. 工作温度与压力——良工截止阀温度覆盖-29℃至570℃，压力覆盖PN1.6~32MPa。

2. Working temperature and pressure - Lianggong globe valve covers a temperature range of -29 ℃ to 570 ℃ and a pressure range of PN1.6~32MPa.

3. 连接方式——法兰连接（J41H系列）、焊接连接（J61Y系列）、螺纹连接等。

3. Connection methods - flange connection (J41H series), welding connection (J61Y series), threaded connection, etc.

4. 材质选择——碳钢适用于常规工况，不锈钢适用于腐蚀性介质，耐热钢适用于高温工况。

4. Material selection - Carbon steel is suitable for conventional working conditions, stainless steel is suitable for corrosive media, and heat-resistant steel is suitable for high temperature working conditions.

5. 驱动方式——手动、电动、气动等多种驱动方式可选。

5. Drive mode - Multiple drive modes such as manual, electric, pneumatic, etc. are available.

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