Double Offset Lug Butterfly Valve – Class 150 / 300 / 600 (8" and above)
API 609 double-offset (double-eccentric) butterfly valve in wafer, lug, and flanged-end configurations. Stellite 6 body seat and EPDM/PTFE disc seat for bubble-tight shutoff in industrial service.
- Pressure
- Class 150 – Class 600
- Size Range
- 2" to 24"
- Testing
- API 598
⚠ Pending engineering review: Pending engineering sign-off: pressure figure is a hydro-test (shell) value, not a confirmed Class rating.
- 01
Pressure Rating
Class 150 (32 Kg/cm²) / Class 300 (78 Kg/cm²) / Class 600 (159 Kg/cm²)
- 02
Size Range
- 03
Material
- 04
Standards
01
Pressure Rating
Class 150 (32 Kg/cm²) / Class 300 (78 Kg/cm²) / Class 600 (159 Kg/cm²)
Reference standard & materials
Same data as the printed catalogue
Reference standard
- MFG. STD
- API 609
- Face to Face
- API 609, CAT.-B
- Wafer End
- Suitable to mount ASME B16.5
- Lug End
- ASME B16.5
- Flange End
- ASME B16.5
- Insp. & Test.
- API 598
- Press & Temp.
- ASME B16.34
Material of construction
| No. | Description | Carbon Steel | Stainless Steel | Duplex | Low Carbon Steel |
|---|---|---|---|---|---|
| 01 | Body | ASTM A216 GR.WCB | ASTM A351 GR.CF8M | ASTM A995 GR.5A | ASTM A352 GR.LCC |
| 02 | Disc | ASTM A216 GR.WCB | ASTM A351 GR.CF8M | ASTM A995 GR.5A | ASTM A351 GR.CF8 |
| 03 | Stem | ASTM A182 GR.F6a | SS 316 | ASTM A182 GR.F53 | SS 304 / SS 316 |
| 04 | Disc Seat | PTFE / Metal Seat | PTFE / Metal Seat | PTFE / Metal Seat | PTFE / Metal Seat |
| 05 | Bottom Cover | ASTM A216 GR.WCB | ASTM A351 GR.CF8M | ASTM A995 GR.5A | ASTM A352 GR.LCC |
| 06 | 'O' Ring | Viton / PTFE | Viton / PTFE | Viton / PTFE | Viton / PTFE |
| 07 | L.N. Cap Screw | Stainless Steel | Stainless Steel | Stainless Steel | Stainless Steel |
| 08 | Body Seat Ring | Stainless Steel | Stainless Steel | Stainless Steel | Stainless Steel |
| 09 | L.N. Cap Screw | Stainless Steel | Stainless Steel | Stainless Steel | Stainless Steel |
| 10 | Body Seat | Stellite 6 | Integral with body or Stellite 6 | Integral with body or Stellite 6 | Stellite 6 |
| 11 | Gear Box | Standard | Standard | Standard | Standard |
| 12 | Seal O-Ring | Viton / PTFE | Viton / PTFE | Viton / PTFE | Viton / PTFE |
Dimensions
mm · ASME B16.5 flange details · weights on request
| Face to Face (A) | Flange Details, ASME B16.5 | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Size | A (WF) | A (LUG) | A (FE) | OD | PCD | RFD | T | ØH | N | Operating System |
| 2" | 45 | 45 | 108 | 152 | 120.6 | 92.1 | 14.3 | 19 | 04 | Lever |
| 2.5" | 48 | 48 | 112 | 178 | 139.7 | 104.8 | 15.7 | 19 | 04 | Lever |
| 3" | 48 | 48 | 114 | 190 | 152.4 | 127.0 | 17.5 | 19 | 04 | Lever |
| 4" | 54 | 54 | 127 | 229 | 190.5 | 157.2 | 22.4 | 19 | 08 | Lever |
| 5" | — | — | 140 | 254 | 215.9 | 185.7 | 22.4 | 22 | 08 | Lever |
| 6" | 57 | 57 | 140 | 279 | 241.3 | 215.9 | 23.9 | 22 | 08 | Lever |
| 8" | 64 | 64 | 152 | 343 | 298.4 | 269.9 | 26.9 | 22 | 08 | Lever |
| 10" | 71 | 71 | 165 | 406 | 362.0 | 323.8 | 28.4 | 25 | 12 | Gear Box |
| 12" | 81 | 81 | 178 | 483 | 431.8 | 381.0 | 30.2 | 25 | 12 | Gear Box |
| 14" | 92 | 92 | 190 | 533 | 476.2 | 412.8 | 33.3 | 29 | 12 | Gear Box |
| 16" | 102 | 102 | 216 | 597 | 539.8 | 469.9 | 35.1 | 32 | 16 | Gear Box |
| 18" | 114 | 114 | 222 | 635 | 577.8 | 533.4 | 38.1 | 32 | 16 | Gear Box |
| 20" | 127 | 127 | 229 | 698 | 635.0 | 584.2 | 41.1 | 32 | 20 | Gear Box |
| 24" | 154 | 154 | 267 | 813 | 749.3 | 692.2 | 46.0 | 35 | 20 | Gear Box |
Technical specifications
- Material
- Body: ASTM A216 GR.WCB (CS) / ASTM A351 GR.CF8M (SS) / ASTM A995 GR.5A (Duplex)
- Pressure Rating
- Class 150 (32 Kg/cm²) / Class 300 (78 Kg/cm²) / Class 600 (159 Kg/cm²)
- Temperature Range
- -10°C to +200°C (EPDM/PTFE disc seat limited; CS body to +427°C)
- Eng Note
- Pending engineering sign-off: pressure figure is a hydro-test (shell) value, not a confirmed Class rating.
- Size Range
- 2" to 24" (DN 50–600)
- Disc
- ASTM A216 GR.WCB / ASTM A351 GR.CF8M / ASTM A995 GR.5A
- Stem
- ASTM A182 GR.F6a (CS) / SS 304 / SS 316
- Disc Seat
- EPDM / PTFE
- Body Seat
- Stellite 6 (CS/LCS) / Integral with body or Stellite 6 (SS)
- End Types
- Wafer (suitable to mount ASME B16.5), Lug End (ASME B16.5), Flange End (ASME B16.5)
- Face T To Face
- API 609, Category B
- Operating System
- Lever (2"–6" Class 150/300), Gear Box (8" and above)
- Model Numbers
- VX-BFV-DO-1711 (Cl.150) / VX-BFV-DO-1712 (Cl.300) / VX-BFV-DO-1713 (Cl.600)
Standards & testing
- MFG. STD: API 609
- Face to Face: API 609, CAT.-B
- Wafer End: Suitable to mount ASME B16.5
- Flange & Lug End: ASME B16.5
- Insp. & Test: API 598
- Press. & Temp: ASME B16.34
Custom engineering
Special trims, exotic materials and non-standard dimensions are available against your datasheet — send it with your quote request and our engineering team will respond with a compliant proposal.