The XSTOU FIG910S high-performance double eccentric butterfly valve is designed with an eccentric disc and offset shaft, integrating a flexible lip seal system into a compact and lightweight body. As a result, in many applications, the valve can replace globe and gate valves, offering simpler operation, longer service life, and lower cost. Its outstanding performance makes it widely used in airport refueling, hydrocarbon processing, HVAC, air handling, chemical processing, purified gas, steam and vacuum services, potable water, powder and pulp handling, among many others.

The wafer-style design facilitates installation between flanges and saves pipeline length.

Structural Features
Full shaft stem design with ISO 5211 square drive
ISO 5211 integral top flange
Easy adjustment of the gland after actuator installation
Belleville washers on the gland nut provide consistent sealing force between the shaft and seals
Gland evenly compresses packing and prevents stem blowout
Multiple rows of RPTFE or graphite V-ring seals ensure self-sealing of the stem
Extended top flange height allows for pipeline insulation
Self-energized seat extends service life and reduces maintenance costs? Pinless connection between disc and shaft enables easy part replacement, even under corrosive conditions
Seat retainer supports the seat and allows for easy replacement
Double offset disc reduces operating torque
Alloy-hardened disc sealing surface for metal seats increases seal life
Integral disc stop prevents overtravel
Soft seat, fire-safe seat, and metal seat are interchangeable
PTFE-lined SS316 bearings support the stem and extend service life
Thrust ring for anti-blowout and anti-static protection
Connection Standards Wafer FIG910S, Lug FIG910U
Size Range 2"-24"
Working Pressure Class150, Class300
Flange Standards ASME B16.5 Class150, Class300; EN1092 PN16, PN25, PN40