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overview:The Triple-offset design: shaft offsets from the centerline of sealing surface to form the 1st offset; the shaft offsets from centerline of pipeline to form the 2nd offset; and the scalene cone form the 3rd offset. This design can make effectively use of cam effect, and completely eliminate the friction between the seat and sealing surface in the 90°travel, preventing the valve from leakage caused by the abrasion of the sealing face, and extend its service life.In petrochemical, LNG, coal chemical, nuclear power, thermal power and other fields need valves, triple-offset metal-seated butterfly valves play an important and indispensable role. It occupies the high-end market of valves due to its inherent characteristic of wide range of sizes, pressure, medium and temperature, low torque, compact design, easy installation and operation, bi-directional tight shut off and long life cycle.

Basic Parameters                                                           

Size range: 3” ~ 128” (80mm ~ 3200mm) (Note:  including all the listed pressure class)

Pressure class: Class 150, Class300, Class600. Class900, Class1500; PN25, PN40, PN63, PN100, PN150, PN260

Connection type: wafer, lug, double flanged, butt-welded

Working temperature: -196˚C ~ +650˚C (-321°F ~ +1202°F)

Drive type: worm gear, pneumatic, electric, hydraulic.

Applicable media: applicable for the pressures ranging from vacuum to high pressure, Cryogenic to ultra-high temperature and other kinds of applications.