POSI-SEAL Type A31A High-Performance
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The Type A31A valve is available as either a flangeless (wafer style) design or as a single-flange (lugged) design.
A keyed drive shaft combines with a variety of handlevers, handwheels, or pneumatic piston diaphragm actuators to make the Type A31A a reliable, high-performance butterfly valve for a variety of on-off applications in the various process industries.
The Type A31A valve can be supplied with one of several dynamic seals that can be used in a variety of demanding applications. With the appropriate seal selection and materials of construction, the pressure-assisted seal provides excellent shutoff against the full ANSI class pressure range for the specific valve type.