GUAGEMART delivers reliable Fisher D3 FloPro valves with competitive pricing, fast shipping, and expert support—engineered for performance and backed by quality service.
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The Fisher A31D is a high-performance, double-flange butterfly valve designed for throttling and on/off service in demanding industrial applications. It features a splined or keyed drive shaft for reliable operation and is available in sizes NPS 3 through 12 with pressure ratings of Class 150 (CL150) and Class 300 (CL300). This robust valve is ideal for industries such as oil & gas, chemical processing, power generation, and water treatment, offering precise flow control and long-term durability.
| Specifications | Details |
|---|---|
| Certifications | PED, CRN, Fugitive Emission, NACE, ATEX, CUTR, Fire Safe |
| Critical Service | General Service |
| Flow Characteristics | Linear |
| Material | Carbon Steel, Stainless, Alloy |
| Operating Temperature | Standard Temperature, High Temperature |
| Pressure Class | ASME |
| Process Connection Type | Double Flanged |
| Shutoff Class | Class VI (FCI 70-2), MSS SP-61 |
| Valve Size | NPS 3, NPS 4, NPS 6, NPS 8, NPS 10, NPS 12 |
| Valve Size Standard | NPS |
| Other Configurations | Contact your local Emerson business partner or sales office to learn about additional specifications or options for this product. |
The A31D valve features a pressure-assisted seal design, ensuring tight shutoff while allowing for smaller actuators—ideal for applications requiring full ASME B16.34 shutoff performance.
Its balanced design ensures consistent opening and closing torque, no matter which direction the differential pressure comes from, making operation smooth and predictable.
Built-in shaft-blowout protection enhances safety, preventing accidental disengagement under high-pressure conditions.
For improved sealing performance, the optional ENVIRO-SEAL packing system offers better sealing, guiding, and force distribution, reducing leaks and wear.
The valve supports both splined and keyed shaft connections, giving you flexibility to match your actuator requirements.
It offers specialized trim and bolting materials for harsh environments, including sour service (NACE-compliant) applications involving corrosive liquids and gases.
The seal retainer screws are strategically placed to avoid interference with flat sheet or spiral-wound gaskets, ensuring a reliable seal without compromising flange performance.
The self-centering body design aligns automatically with pipeline flanges during installation, making setup faster and more precise while maintaining proper sealing alignment.
The Fisher A31D Double-Flange Butterfly Valve from GUAGEMART delivers high-performance flow control with industry-leading reliability, featuring pressure-assisted sealing and balanced torque for consistent operation. We offer competitive pricing without compromising on quality, backed by fast global shipping to minimize downtime. Our dedicated support team ensures prompt technical assistance and after-sales service, while NACE-compliant materials and certifications (PED, ATEX, Fire Safe) make this valve ideal for demanding oil & gas, chemical, and power applications. Trust GUAGEMART to provide durable solutions with the right balance of cost-efficiency and long-term performance.
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