良工閥門非常有分量的履歷，不是“1946年建廠”，而是“1974年起為秦山核電站研制核級閥門”。核電站用的閥門和普通工業(yè)閥門，差距遠比想象中大。

The most significant resume of Lianggong Valve is not "building the factory in 1946", but "developing nuclear grade valves for Qinshan Nuclear Power Plant since 1974". The difference between valves used in nuclear power plants and ordinary industrial valves is far greater than imagined.

核級閥門的第一道門檻是“零泄漏”。 核電站一回路里的介質帶有放射性，明顯外漏都是安全事故。良工研制的核二、三級閘閥、截止閥、止回閥、波紋管截止閥，在核電站的使用狀態(tài)下表現(xiàn)良好，受到用戶高度評價。波紋管截止閥采用金屬波紋管作為閥桿密封元件，形成“零泄漏”的金屬屏障，適用于蒸汽、易燃、易爆、有毒介質的管路上。

The first threshold for nuclear grade valves is' zero leakage '. The medium in the primary circuit of a nuclear power plant is radioactive, and any leakage is a safety accident. The nuclear second and third stage gate valves, globe valves, check valves, and bellows globe valves developed by Lianggong have performed well in the use of nuclear power plants and have been highly praised by users. The bellows globe valve uses metal bellows as the valve stem sealing element, forming a "zero leakage" metal barrier, suitable for pipelines containing steam, flammable, explosive, and toxic media.

抗震和耐溫是第二道門檻。 核電站的設計基準事故包括地震工況，閥門建議在地震載荷下保持結構完整和密封性能。良工的核級閥門產品通過了核安全局的設計和制造資格許可，1995年獲得核級閥門設計制造許可證和制造資格許可證。

Earthquake resistance and temperature resistance are the second threshold. The design basis accidents of nuclear power plants include earthquake conditions, and valves must maintain structural integrity and sealing performance under seismic loads. Lianggong's nuclear grade valve products have passed the design and manufacturing qualification license of the Nuclear Safety Administration, and obtained the nuclear grade valve design and manufacturing qualification license in 1995.

資質不是“花錢買的”，是“做出來的”。 民用核承壓設備設計制造許可證的審核出彩其嚴格，涵蓋設計能力、制造工藝、質量體系、試驗驗證等全維度。良工是國內較早一批獲得該許可證的單位之一。這也是為什么良工后來能為“華龍一號”海外首堆工程巴基斯坦卡拉奇核電項目提供關鍵閥門設備。

Qualifications are not "bought with money", they are "made". The review of the design and manufacturing license for civil nuclear pressure equipment is extremely strict, covering all dimensions such as design capability, manufacturing process, quality system, and test verification. Lianggong is one of the earliest units in China to obtain this license. That's also why Lianggong was able to provide key valve equipment for the overseas first reactor project of "Hualong One" in Karachi, Pakistan.

核級技術的“下放”價值。 良工把核級閥門的技術標準應用到了工業(yè)閥門上——比如密封面堆焊硬質合金、材料無損檢測、壓力自緊密封結構。這些技術在核電站是“建議的”，在石化、電力等高溫高壓場景中同樣能顯著提升閥門的可靠性和壽命。對于采購方而言，選擇有核級產品線的廠家，本質上是在“借用”核工業(yè)的質量標準。

The 'decentralized' value of nuclear grade technology. Lianggong has applied the technical standards of nuclear grade valves to industrial valves, such as hard alloy welding on the sealing surface, non-destructive testing of materials, and pressure self tightening sealing structures. These technologies are "essential" in nuclear power plants and can significantly improve the reliability and lifespan of valves in high-temperature and high-pressure scenarios such as petrochemicals and electricity. For the purchaser, choosing a manufacturer with a nuclear grade product line is essentially borrowing the quality standards of the nuclear industry.