原文：
固定球阀的特点 　　1、双阻塞与排放功能：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。 　　2、自动泄压功能：阀门体腔停留介质温度升高而引起异常升压时，不需通过　 安全阀，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安全性非常重要。 　　3、防火安全结构：阀门都具备防火安全功能，其设计、制造均遵循API 607和API 6FA 规范要求。固定球阀图片 固定球阀结构图 固定球阀 　　固定球阀的优势 　　1、密封紧急注脂救护：由于介质中的异物或火灾造成阀座密封意外失效，注脂阀提供了与注脂枪的快速连接，方便快捷地将密封脂注入到阀座密封部位，缓解泄漏。 　　2、可靠的阀杆密封和低操作力矩：除了设置标准密封套圈外，填料压盖上也设置了“O”型密封圈，双重密封保证了阀杆密封的可靠性；增设的石墨填料和密封脂注入使火灾后的阀杆泄漏降至{zd1}。阀杆滑动轴承和止推轴承使阀门操作轻便。 　　3、全通径或缩径：可根据需要选用全通径或缩径结构。全通径阀门流量孔径与管线内径一致，便于管线清扫。 　　4、阀杆可加长：根据安装或操作的需要，可对阀门阀杆进行加长。加长杆球阀，特别适用于城市煤气等需要埋地铺设管线的场合。加长阀杆尺寸按客户需要确定。 　　5、操作灵活：采用具有小摩擦系数和良好自润滑性的阀座和阀杆轴承，大大地减少了阀门的操作扭矩。因此即使在没有提供密封润滑脂的情形下，也能够长期灵活自如地对阀门进行操作

“ Features and advantages of the fixed ball valve”是由提供的阀门行业新闻，译文仅供参考。另外，中国球阀网还提供相关产品搜索： 、 、 、 、 、 、 、 、 、 等。

译文：
The characteristics of the fixed ball valve 1, double block and emission features: the fixed valve seat by spring preload variable, whether the valve is fully open or fully closed state, on the downstream side of the seat cuts off the fluid through the valve in the cavity left in emissions valve discharge. 2, automatic pressure relief feature: the valve body cavity caused by temperature rise, stop when an abnormal pressure, without going through the safety valve, and can function alone automatic pressure relief valve seats, which ensure that the valve in the delivery of liquid medium Security is very important. 3, structural fire safety: fire safety valve functions are available, the design, manufacture were to follow API 607 and API 6FA specifications. Fixed ball picture ball valve fixed ball valve Fixed chart The advantages of a fixed ball valve 1, sealing grease emergency ambulance: As the foreign media or fire accidents caused by failure of the valve seat seal, valve grease and grease gun providing fast connection, easily and quickly injected into the valve seat seal grease seal parts, ease leak . 2, reliable stem sealing and low operating torque: In addition to setting the standard sealing ring, the packing gland has also set up "O" ring seals, double seals to ensure the reliability of the valve stem seals; addition of graphite filler and seal fat into the fire so that the valve stem leakage to a minimum. Stem sliding bearings and thrust bearings so that the valve is easy to operate. 3, full bore or reduced diameter: according to the need to use all-pass or reduced diameter structure. Full Bore Valve flow aperture consistent with the pipeline diameter, easy of cleaning. 4, the stem can be extended: the need for the installation or operation, the valve stem can be lengthened. Plus pole ball valve, particularly in urban gas pipelines and other necessary occasion for laying underground. Lengthened stem size according to customer needs to determine. 5, flexible operation: use of a small friction coefficient and good self-lubrication of the valve seat and stem bearing, greatly reducing the valve operating torque. Therefore, even if not provided in the case of sealed grease, but also the long-term flexibility of the valve to operate freely