截止閥的啟閉件是塞形的閥瓣，密封面呈平面或錐面，閥瓣沿流體的中心線作直線運(yùn)動(dòng)。這種“直線運(yùn)動(dòng)”的設(shè)計(jì)，讓截止閥在所有閥門(mén)中擁有非?？煽康拿芊庑阅堋y瓣越往下壓，密封越緊。與閘閥相比，截止閥的結(jié)構(gòu)更簡(jiǎn)單、維修更方便；與球閥相比，截止閥的密封更可靠、更適合需要頻繁啟閉的場(chǎng)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.

良工截止閥的核心技術(shù)優(yōu)勢(shì)體現(xiàn)在密封可靠性、結(jié)構(gòu)簡(jiǎn)單性和工況適應(yīng)性三個(gè)方面。以J41H-16C為例，該型號(hào)為法蘭連接截止閥，密封面堆焊硬質(zhì)合金（H），公稱壓力1.6MPa（16），閥體材質(zhì)為碳鋼（C），口徑覆蓋DN15至DN350。工作溫度范圍-29～550℃，適用于石油、化工、制藥、化肥、電力行業(yè)等各種工況。

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.

良工截止閥的主流產(chǎn)品系列

The mainstream product series of Lianggong globe valves

J41H系列法蘭截止閥是良工截止閥的“拳頭產(chǎn)品”。該系列采用法蘭連接方式，閥體材質(zhì)為鑄鋼，密封面堆焊硬質(zhì)合金，適用于公稱壓力PN1.6～16MPa、工作溫度-29～550℃的石油、化工、制藥、化肥、電力行業(yè)等各種工況。口徑覆蓋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.

活塞式截止閥（UJ41H） 是良工截止閥的創(chuàng)新產(chǎn)品。它針對(duì)傳統(tǒng)截止閥、閘閥、球閥、柱塞閥在生產(chǎn)技術(shù)及應(yīng)用過(guò)程中存在的缺陷而研制開(kāi)發(fā)，是機(jī)械閥門(mén)技術(shù)領(lǐng)域更新?lián)Q代的一種節(jié)能與環(huán)保創(chuàng)新產(chǎn)品。該閥門(mén)的實(shí)用新型在于閥體和閥蓋緊配，閥桿上端通過(guò)螺母連接手輪，下端連接活塞，活塞與環(huán)形閥座相應(yīng)配合。公稱壓力覆蓋1.6~6.4MPa，適用溫度≤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 ℃.

日標(biāo)截止閥按照J(rèn)IS標(biāo)準(zhǔn)設(shè)計(jì)制造，閥體材料包括SCPH2-11、SCS13A、SCS14A等，適用溫度從-45℃到540℃。適用于水、蒸汽、油品、硝酸類(lèi)、醋酸類(lèi)等多種介質(zhì)。

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.

焊接截止閥（J61Y） 專為火電站等高溫高壓工況設(shè)計(jì)，公稱壓力PN20～32MPa，工作溫度≤540℃（其中P57/17V工作溫度為570℃），適用于各種高溫高壓系統(tǒng)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.

截止閥選型的5個(gè)核心要點(diǎn)

5 core points for selecting globe valves

1. 介質(zhì)特性——清潔介質(zhì)與含固體顆粒的介質(zhì)對(duì)密封面的要求不同。截止閥只適用于全開(kāi)和全關(guān)，不允許作調(diào)節(jié)和節(jié)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. 工作溫度與壓力——良工截止閥溫度覆蓋-29℃至570℃，壓力覆蓋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. 連接方式——法蘭連接（J41H系列）、焊接連接（J61Y系列）、螺紋連接等。

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

4. 材質(zhì)選擇——碳鋼適用于常規(guī)工況，不銹鋼適用于腐蝕性介質(zhì)，耐熱鋼適用于高溫工況。

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. 驅(qū)動(dòng)方式——手動(dòng)、電動(dòng)、氣動(dòng)等多種驅(qū)動(dòng)方式可選。

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

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