1.独特的阀座三重密封结构

1. Unique triple sealing structure of valve seat

为使阀门更有效地密封，该结构采用三重密封结构，即三角形橡胶密封和塑料插件软密封，加上金属硬密封，如果软密封出现问题，金属密封也能起到作用。同时金属硬密封还是防火结构的设计，即当软密封遭到火灾燃烧时，金属硬密封能够密封。

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.全焊接无外漏结构

2. Fully welded and leak free structure

阀体连接和阀杆连接部位全部为焊接方式，大大降低了介质外漏的可能性。同时也大大提高了阀门应对管道振动和各种自然灾害的能力。

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.双放散阀结构

3. Double release valve structure

阀门的上下游端均设计安装了放散阀，可对管道中的余气进行排放。

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

4.加长袖管结构

4. Extended sleeve structure

阀门的上下游端均焊接有与用户管道相同尺寸的钢管，方便用户现场的安装使用。避免现场焊接安装过程中由于温度过高对阀门软密封零件的伤害。

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.阀杆防飞结构

5. Valve stem anti flying structure

当阀门内腔压力上升时，阀体中腔的压力可能将阀杆推出。为防止这种情况发生，在阀杆处设置有四开环，防止阀杆飞出。这样，对于更换填料较为方便和。

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.阀杆双重密封结构

6. Valve stem double sealing structure

阀杆设计有橡胶和石墨两重4道密封圈，常温时橡胶密封圈和石墨密封圈都起到密封作用。当发生火灾时，石墨密封圈起到密封作用，确保阀杆部位在任何工况条件下都不会产生外漏。

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.防静电设计

7. Anti static design

当操作阀门时，由于球体和阀座之间的摩擦，会产生静电并积聚在球体上。为防止产生静电火花，特在阀门上设置防静电装置，将开关过程产生的静电导出。该设计在阀门使用在燃点较低的汽油、天然气、丙烷等时将能够有效地防止事故的发生。

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.防火结构

8. Fireproof structure

当意外发生火灾时，阀座、填料等非金属材料将被烧坏，大量泄漏的介质可能更加促进火势。阀门的防火结构可阻止介质大量泄漏。在火灾后，各泄漏部位（球与阀体、阀杆与阀体、中法兰）设计成金属接触，满足防火要求。如图，一旦阀座被烧损，阀座在压力作用下将直接和球体的金属面接触，从而阻止介质大量从烧损的阀座处泄漏。其设计、制造均遵循API 607和API 6FA 规范要求。

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.双阻塞与排放（DBB）

9. Dual Blocking and Emission (DBB)

固定球阀采用弹簧预紧浮动阀座，无论阀门处于全开或全关状态时，上下游侧的阀座使流体阻断，阀体中腔滞留物通过排放阀排泄。

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.自动泄压功能

10. Automatic pressure relief function

阀门体腔停留介质温度升高而引起异常升压时，不需通过阀，而仅靠阀座功能就可自动泄压，这对保证阀门在输送液体介质时的性非常重要。

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.用户选用BIB-2结构设计

11. Users choose BIB-2 structural design

对于气体介质的管道，建议客户选用DIB-2结构的阀门，良工阀门的全焊接球阀产品能同时确保上下游阀座能同时密封，中腔压力由于外力升高后，压力同样能从上游端阀座自动泄压，确保阀门能使用。

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.锁定装置

12. Locking device

为防止阀门开关受到误动作以及不可预知的线路振动而产生的不应有的开关动作，在阀门的全开和全关位置设有锁定孔，可用挂锁锁定阀门。特别是阀门安装在野外或在可燃性介质的石油类和化学药品的生产线，该锁定装置就会体现出其独特的优越性。

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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