12 in. Wafer Butterfly Valve, Stainless Disc, EPDM Seat, Gear Operated | 9650G12SE
12 in. Wafer Butterfly Valve, Stainless Disc, EPDM Seat, Gear Operated | 9650G12SE
✓ In stock at our distribution warehouses — typically ships within 1–2 business days.
Freight item — ships LTL (Lower 48)- Flat-rate freight: $199 per order
- Orders $4,999+: quoted freight — priced for your dock, liftgate, and timeline
Buying several, or need a liftgate or jobsite delivery? Request an exact freight quote — usually answered the same business day.
The 12 in. wafer butterfly valve (part 9650G12SE) is a flangeless, gear-operated valve with a 316-grade stainless steel disc and EPDM seat — the right combination for chemical feed, wastewater, and treated-water service where Buna-N seats degrade. The ductile iron wafer body installs between standard ANSI B16.5 125/150 lb pipe flanges.
Technical Specifications
| Manufacturer Part Number (MPN) | 9650G12SE |
| Nominal Size | 12 in. |
| Valve Style | Wafer (flangeless) |
| Design Code | API 609 Class A |
| Face-to-Face | API 609 |
| End Standard | ANSI B16.5 125 lb / 150 lb |
| Inspection & Test | API 598 |
| Top Flange | ISO 5211 F10 |
| Operator | Gear Handle |
Materials of Construction
| Body | Ductile Iron |
| Disc | Stainless Steel |
| Seat | EPDM |
| Stem | 410 Stainless Steel, pinned to disc |
| Packing | PTFE |
Dimensions
| ISO 5211 Top Flange | F10: bolt circle 4.92", 4 × Ø0.47" |
| Face-to-Face Length | Per API 609 — contact us for the certified dimension sheet |
Key Features
- Wafer body — compact and lightweight, mounts between pipe flanges
- Stainless steel disc with EPDM seat — corrosion-resistant, bubble-tight shutoff per API 598 testing
- Gear operator for controlled quarter-turn actuation under load
- 410 stainless stem, pinned to the disc — no slippage
- Center-disc structure: low operating torque, straight-line flow curve
- ISO 5211 top flange — actuator-ready
Other Sizes in This Series
Wafer Butterfly Valve, Stainless Disc, EPDM Seat, Gear Operated. Jump to another size or add it straight to your cart:
| Size | Part # | Price | Cart |
| 2 in. | 9650G2SE | $127.99 | Add to cart |
| 2-1/2 in. | 9650G2.5SE | $142.99 | Add to cart |
| 3 in. | 9650G3SE | $146.99 | Add to cart |
| 4 in. | 9650G4SE | $206.99 | Add to cart |
| 6 in. | 9650G6SE | $288.99 | Add to cart |
| 8 in. | 9650G8SE | $614.99 | Add to cart |
| 10 in. | 9650G10SE | $552.99 | Add to cart |
| 12 in. (this page) | 9650G12SE | $528.99 | — |
For plain water, HVAC, or light-oil service, the ductile iron disc / Buna-N seat version costs less.
Need lug-style construction for dead-end or downstream isolation? See the lug-body version, 9660G12SE.
Common Applications
Water and wastewater treatment, chemical feed and sodium hypochlorite lines, pool and spa systems, food-adjacent washdown, and treated or deionized water where Buna-N seats break down. Note: EPDM is not suitable for oils or fuels — use the Buna-N version for those.
Cross-References & Interchange
Replacing another brand's 12 in. wafer butterfly valve? API 609 Class A wafer bodies interchange dimensionally across manufacturers — match nominal size, seat and disc materials, and flange class, or send us your part number and we will confirm the fit.
Availability
In stock — ships direct from the manufacturer, typically 1–3 business days.
Technical Resources
Expert Guides for This Product
- Won't Seal or Won't Turn? — field troubleshooting
- Selection Guide — wafer vs. lug vs. flanged
- Seat Materials — EPDM vs. Buna-N vs. Viton
- Operator Sizing — when a lever stops being enough
- Dimensions & Cv Chart — flow data by size