Taiwan Jie-Liu VALUE VF-930A Hard Seal Double Eccentric Butterfly ValveThis design utilizes an eccentric disc and offset shaft, integrating a flexible lip-type sealing system into a compact and lightweight valve 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 applicable in airport refueling, hydrocarbon processing, HVAC, air handling, chemical processing, purified gases, steam and vacuum services, potable water, powder and pulp handling, among many others.

The wafer-style design facilitates connection 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 reliable 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 accommodates pipeline insulation
Self-energizing seat extends service life and reduces maintenance costs? Pinless connection between disc and shaft allows easy component replacement, ensuring reliability even under corrosive conditions
Seat retainer supports the seat and permits easy replacement
Double offset disc reduces valve 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 bearing supports the stem and extends service life
Thrust ring for anti-blowout and anti-static protection
Connection Standards Wafer FIG910S, Lug FIG910U
Size Range 2"-24"
Pressure Rating Class150, Class300
Flange Standards ASME B16.5 Class150, Class300; EN1092 PN16, PN25, PN40
Face-to-Face Dimensions API 609 Category B Wafer
Seal Test API 598
Temperature Range PTFE Seat -29°C ~ +200°C, Metal Seat -29°C ~ +400°C
Actuation Options Hand lever, gearbox, pneumatic actuator, electric actuator