1.獨特的閥座三重密封結構

1. Unique triple sealing structure of valve seat

為使閥門更有效地密封，該結構采用三重密封結構，即三角形橡膠密封和塑料插件軟密封，加上金屬硬密封，如果軟密封出現問題，金屬密封也能起到作用。同時金屬硬密封還是防火結構的設計，即當軟密封遭到火災燃燒時，金屬硬密封能夠密封。

To ensure more effective sealing of the valve, this structure adopts a triple sealing structure, which is a triangular rubber seal and a plastic insert soft seal, combined with a metal hard seal. If there is a problem with the soft seal, the metal seal can also play a role. At the same time, metal hard seals are also designed for fire-resistant structures, that is, when the soft seal is burned in a fire, the metal hard seal can seal.

2.全焊接無外漏結構

2. Fully welded and leak free structure

閥體連接和閥桿連接部位全部為焊接方式，大大降低了介質外漏的可能性。同時也大大提高了閥門應對管道振動和各種自然災害的能力。

The valve body connection and valve stem connection are all welded, greatly reducing the possibility of medium leakage. At the same time, it greatly improves the ability of valves to cope with pipeline vibration and various natural disasters.

3.雙放散閥結構

3. Double release valve structure

閥門的上下游端均設計安裝了放散閥，可對管道中的余氣進行排放。

The upstream and downstream ends of the valve are designed and installed with release valves, which can discharge residual gas in the pipeline.

4.加長袖管結構

4. Extended sleeve structure

閥門的上下游端均焊接有與用戶管道相同尺寸的鋼管，方便用戶現場的安裝使用。避免現場焊接安裝過程中由于溫度過高對閥門軟密封零件的傷害。

The upstream and downstream ends of the valve are welded with steel pipes of the same size as the user's pipeline, which facilitates on-site installation and use by the user. To avoid damage to the soft sealing parts of the valve due to high temperature during on-site welding and installation.

5.閥桿防飛結構

5. Valve stem anti flying structure

當閥門內腔壓力上升時，閥體中腔的壓力可能將閥桿推出。為防止這種情況發生，在閥桿處設置有四開環，防止閥桿飛出。這樣，對于更換填料較為方便和安全。

When the pressure inside the valve chamber rises, the pressure inside the valve body may push the valve stem out. To prevent this situation from happening, four open rings are installed at the valve stem to prevent the valve stem from flying out. In this way, it is more convenient and safe to replace the packing.

6.閥桿雙重密封結構

6. Valve stem double sealing structure

閥桿設計有橡膠和石墨兩重4道密封圈，常溫時橡膠密封圈和石墨密封圈都起到密封作用。當發生火災時，石墨密封圈起到密封作用，確保閥桿部位在任何工況條件下都不會產生外漏。

The valve stem is designed with four double sealing rings of rubber and graphite. At room temperature, both the rubber sealing ring and graphite sealing ring play a sealing role. When a fire occurs, the graphite sealing ring plays a sealing role, ensuring that the valve stem will not leak under any working conditions.

7.防靜電設計

7. Anti static design

當操作閥門時，由于球體和閥座之間的摩擦，會產生靜電并積聚在球體上。為防止產生靜電火花，特在閥門上設置防靜電裝置，將開關過程產生的靜電導出。該設計在閥門使用在燃點較低的汽油、天然氣、丙烷等時將能夠有效地防止事故的發生。

When operating the valve, static electricity will be generated and accumulate on the sphere due to the friction between the sphere and the valve seat. To prevent the generation of static sparks, anti-static devices are installed on the valve to discharge the static electricity generated during the switching process. This design will effectively prevent accidents when valves are used in gasoline, natural gas, propane, etc. with lower ignition points.

8.防火結構

8. Fireproof structure

當意外發生火災時，閥座、填料等非金屬材料將被燒壞，大量泄漏的介質可能更加促進火勢。閥門的防火結構可阻止介質大量泄漏。在火災后，各泄漏部位（球與閥體、閥桿與閥體、中法蘭）設計成金屬接觸，滿足防火要求。如圖，一旦閥座被燒損，閥座在壓力作用下將直接和球體的金屬面接觸，從而阻止介質大量從燒損的閥座處泄漏。其設計、制造均遵循API 607和API 6FA 規范要求。

When an unexpected fire occurs, non-metallic materials such as valve seats and packing will be burned out, and a large amount of leaked media may further promote the fire. The fireproof structure of the valve can prevent a large amount of medium leakage. After a fire, each leakage area (ball to valve body, valve stem to valve body, and middle flange) is designed to have metal contact, meeting fire protection requirements. As shown in the figure, once the valve seat is burned, the valve seat will directly contact the metal surface of the sphere under pressure, thereby preventing a large amount of medium from leaking from the burnt valve seat. Its design and manufacturing comply with the requirements of API 607 and API 6FA specifications.

9.雙阻塞與排放（DBB）

9. Dual Blocking and Emission (DBB)

固定球閥采用彈簧預緊浮動閥座，無論閥門處于全開或全關狀態時，上下游側的閥座使流體阻斷，閥體中腔滯留物通過排放閥排泄。

The fixed ball valve adopts a spring pre tensioned floating valve seat. Regardless of whether the valve is in a fully open or fully closed state, the valve seats on the upstream and downstream sides block the fluid, and the trapped substances in the valve body are discharged through the discharge valve.

10.自動泄壓功能

10. Automatic pressure relief function

閥門體腔停留介質溫度升高而引起異常升壓時，不需通過安全閥，而僅靠閥座功能就可自動泄壓，這對保證閥門在輸送液體介質時的安全性非常重要。

When the temperature of the medium in the valve body cavity rises and causes abnormal pressure rise, there is no need to pass through the safety valve. Instead, relying solely on the valve seat function can automatically relieve pressure, which is very important to ensure the safety of the valve when transporting liquid medium.

11.用戶選用BIB-2結構設計

11. Users choose BIB-2 structural design

對于氣體介質的管道，建議客戶選用DIB-2結構的閥門，良工閥門的全焊接球閥產品能同時確保上下游閥座能同時密封，中腔壓力由于外力升高后，壓力同樣能從上游端閥座自動泄壓，確保閥門能安全使用。

For gas medium pipelines, it is recommended that customers choose valves with a DIB-2 structure. Lianggong Valve's fully welded ball valve products can ensure that the upstream and downstream valve seats can be sealed simultaneously. When the pressure in the middle chamber increases due to external forces, the pressure can also be automatically relieved from the upstream valve seat, ensuring the safe use of the valve.

12.鎖定裝置

12. Locking device

為防止閥門開關受到誤動作以及不可預知的線路振動而產生的不應有的開關動作，在閥門的全開和全關位置設有鎖定孔，可用掛鎖鎖定閥門。特別是閥門安裝在野外或在可燃性介質的石油類和化學藥品的生產線，該鎖定裝置就會體現出其獨特的優越性。

To prevent unexpected switching actions caused by misoperation of valve switches and unpredictable line vibrations, locking holes are installed in the fully open and fully closed positions of the valve, which can be locked with a padlock. Especially when the valve is installed in the field or in the production line of petroleum and chemical drugs with combustible media, this locking device will demonstrate its unique superiority.

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