进口上装式球阀—英国ARI阿里斯顿适合用于天然气管道，进口上装式球阀的一体化阀体减少了阀门的泄露点，在线维修方便，制造工艺先进，承受压力高，应用范围广。DN100以下上装式球阀规格为双斜面结构设计，在弹簧的作用下，该阀能自补偿密封，保证其在中、低压时均有良好的密封性能，使用寿命长。

结构特点及用途
1、 电动偏心半球阀压力损失小：全开时水损为零，流道完全畅通，且介质不会沉积在阀体中腔内。
2、 耐颗粒磨损：V型开口的球冠与金属阀座之间具有剪切作用，在关闭过程中，只在最后一刻球冠才靠向阀座，不形成磨擦，且阀座耐磨的镍合金制成，不易被冲刷磨损，因而适用于含纤维、微小固体颗粒、浆等。
3、 适合高流速介质：直通流道，坚固的偏心一曲轴使之适合高流速且无振动。
4、 寿命长：无易损部件，由于偏心作用，阀门启闭时密封面间无磨擦，则使用寿命长。
5、 维修方便：阀门维修时不需从管路上拆下，只要打开阀盖即可进行维修
6、 气动偏心半球阀广泛适用于水、污水、含微小固体颗粒、水、蒸汽、煤气、天然气、油品等。
Structural characteristics and uses
1、 little pressure loss: water loss is zero at full open, completely smooth flow, which will not be deposited on dielectric Valve cavity.
2、 Bears the particles attrition: V shape opens the mouth between the ball crown and the metal valve seat the action is shear, in the closure process, only then depends on in last the moment ball crown to the valve seat, does not form the friction, also the valve seat makes with the wear-resisting nickel alloy, is not easily washed out the attrition, thus is suitable to contains the textile fiber, the small solid particle, the thick liquid and so on.
3、 Suitable for high-velocity media: Direct flow, solid eccentric crank ,make it suitable for high speed without vibration.
4、 Long life: no vulnerable parts, there is no friction between the sealing surface when the valve opens and close due to the function of the eccentric, therefore there is long life.
5、 Easy maintenance: Valve repair without remove from the pipeline, as long as the valve cover is opened for maintenance.
6、 Widely used in water, sewage, containing tiny solid particles, water, steam, gas, oil, etc.