Description

Fisher A31D Double-Flange Butterfly Valve
Product Description
🦋 The Fisher A31D Double-Flange Butterfly Valve is a high-performance butterfly valve designed for project-driven installations where reliable shutoff, clear compliance documentation, and stable delivery matter. With its double-flanged body style, the A31D supports easier alignment on the line and consistent control performance for general service applications—while offering certifications such as Fugitive Emission, NACE, Fire Safe, and ATEX (configuration dependent).
Key Features
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✅ Double-Flanged design for stable installation and easy alignment
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🔒 Class VI shutoff to reduce leakage risk and rework
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🧾 Broad certification coverage: PED / CRN / ATEX / NACE / Fire Safe / Fugitive Emission
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🌡️ Built for Standard and High-Temperature service
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📈 Linear flow characteristic for predictable control behavior
Specifications
| 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. |
Selection Guide
🧩 Send these details for a fast, correct selection: media, NPS size, ASME class, temperature, and required certifications (NACE/ATEX/Fire Safe/Fugitive Emission).
Applications
🏭 EPC & projects needing smooth approval and acceptance with complete documents
🛠️ Maintenance replacements requiring tight shutoff and stable operation
📦 Procurement teams aiming to reduce mismatch and delivery risk
Project Support
🤝 We help you minimize project risk with: configuration checklist, document pack, and clear lead-time updates.
FAQ
Q: Is A31D a regulator?
A: No. It is a high-performance butterfly control valve (double-flanged).
Q: What sizes are common?
A: NPS 3–12 (configuration dependent).
Contact CTA
📩 Share your size, class, temperature, media, and certification needs—we’ll confirm configuration and quote quickly.

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