◆Integral valve body, avoids the leakage of the body, unaffected by pipeline, bolt stress or sudden
change of pressure, with good vibration resistance.
◆Streamlined eccentric cavity butterfly valve body provides a economical high-capacity flow path and
spherical cap is hidden owing to the rotation of a full angle, which maximizes the capacity, lowers flow
resistance and increases flow capacity. Thus makes it possible to use a smaller size and more
◆The double eccentric design that stem axis deviates from both spherical cap and the center of valve
body with a structure of spherical surface linear seal, which makes the sealing pair moving in a cam in
the course of open-close operation of the valve, and the effect is realized that the sealing pair is
separated when the spherical cap opens, and the pair is sealed when the cap closes. Greatly reducing
the opening resistance moment, decreasing extrusion abrasion and prolonging the useful life of seat.
◆As a result of the structure design of using fixed ball, most of stresses are eliminated promptly on the
valve body and line pipe and other stresses acted on the stem is dispelled on the upper and lower axle
sleeves of the stem when a super pressure of upstream medium acts on spherical cap, and therefore
the useful life of the valve is extended.
◆The special patented seat referenced the principle of flow characteristic of cage throttle orifice provides
choices of orifices on the seat with different characteristics which avoids many disadvantages that
orificing will be carried out in terms of flow characteristic of the valve plug opening, thus not only
guaranteeing the control performance of valve, but also prolonging the useful life of valve.
◆The seat adopts a special design, when the valve acts, it can scrape off particles clung on spherical
cap for preventing the scratch on sealing face from foreign matter, and the sharp edge can cut off
coking or agglomerate. It can do both self-cleaning and avoiding valve plug jammed.
◆The rotation of eccentric spherical cap adopts the structure of double axle sleeves, with high
mechanical stability and minimized starting torque, which ensures the valve with excellent sensitivity
and induction speed.
◆Type of Valve Body: straight-through casting/forged eccentric ball valve
◆Nominal Pressure: PN16，PN25，PN40，PN50，PN64, etc.
◆Pressure Rating: ANSI Class150，300
◆Nominal Dia.：DN25～400; Port: 1″～16″
◆Valve Body Material: WCB，CF8（304），CF8M（316），CF3M（316L), etc.
◆Stem Material:304，316，17-4PH，316L, etc.
◆Plug Material: CF8，CF8M，CF3M（316L), reinforced ceramics, etc.
◆Material, Seat and Fixed Loop: PTFE，304，316，316L，reinforced ceramic, etc.
◆Hardening Treatment: overlay STL, surface hardening tungsten carbide, carborundum, etc.
◆Working Temperature :soft seal for -20～+250℃; hard seal for -45～+450℃
◆Leakage Class: soft seal for ANSI Class VI; hard seal for ANSI Class V and Class VI
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