主要设计特点－Main Designing Features
· 整体式阀体设计，上装式枢轴固定支持。整体式枢轴固定球杆设计。
One piece body design, top entry trunnion support. One piece trunnion supported ball and stem design.
· 进口和出口双向密封功能
Seal on up-stream and down-stream sides of valve
· 双阻塞泄放功能
Double block and bleed function
· 高强度整体式球杆结构，确保球体在高压下具有正确的中心位置，保证阀门良好的操作性能
Heavy-duty one-piece ball and stem unit ensures central position of ball under the highest working pressure. This permits ease of operation.
· 阀盖与球杆有效接触，性能优越的防静电装置
Grounding device for positive anti-static contact between ball / stem and bonnet.
· 2组O型
密封圈，加上阀杆上的防火
填料结构，可有效防止泄漏
Two set of O-ring seals plus fire-safe packing on the stem efficiently prevent leakage
· 密封剂注入器设计，可在紧急状态下注入
密封胶，对阀杆或阀座进行密封
Sealant injection fittings for emergency stem or seat sealing
· 预置驱动装置平台及
螺栓孔，可随时装配驱动装置
Actuator mounting surface are machined and drilLED, ready for mounting actuator
· 可选择的防火功能
Optional fire-safe function
· 符合NACE规范要求
All ball valves can be supplied in full compliance with NACE MR0175 Standard.
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