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API609 High-Performance Double Offset Butterfly Valve for Oil & Gas Pipeline Industrial Applications
- Size: DN150 - DN1800
- Pressure Ratings: PN10, PN16, PN25
- Connections: Double Flange
- Temperature: ≤ 80°C
- Body Materials: Ductile iron
- Disc Materials: Ductile iron, EN-GJS-500-7,CF8,CF8M
- Seat Materials: Disc side sealing ring, EPDM,NBR
- Medium: Water, Oil, Gas
- Design Standard: EN 593, EN1074-1/2
- Face to Face: EN558 series 13 and series 14
- Flange Standard: EN1092
- Applications: HAVC, Fire protection,water treatment,irrigation, CDU
The Athena series double eccentric butterfly valve is engineered for high-performance flow control in water and industrial pipeline systems.
Designed in accordance with EN 593 and EN 1074 standards, it delivers reliable sealing, reduced torque, and extended service life, making it an ideal solution for:
- Municipal water supply
- Wastewater treatment plants
- Irrigation systems
- Industrial water pipelines
- Large-diameter transmission lines
Why Choose Double Eccentric Design
Compared with concentric butterfly valves, the Athena double eccentric design offers:
- Reduced seat wear due to offset geometry
- Lower operating torque (suitable for electric/pneumatic actuators)
- Improved sealing performance under pressure
- Longer service life in frequent operation conditions
| Feature | Concentric | Double Eccentric |
| Seat Wear | High | Low |
| Torque | Higher | Lower |
| Service Life | Shorter | Longer |
| Application | General | Industrial/Large pipeline |
| NO | DESCRIPTION | MATERIAL -STANDARD | OPTIONAL |
| 1 | Body | EN-GJS-500-7,epoxy coated 250µm | 300µm |
| 2 | Seat area | Integral,epoxy coated | Welded stainless steel AlSI 309L |
| 3 | Disc | EN-GJS-500-7,epoxy coated 250µm | 300µm |
| 4 | Sealing ring | EPDM | NBR |
| 5 | Retaining ring | CF8 | CF8M, AISI 316Ti |
| 6 | Drive shaft | AISI 420 | AISI 431, Duplex |
| 7 | Trunnion | AISI 420 | AISI 431, Duplex |
| 8 | Drive side cover | AISI 304 | |
| 9 | End cover | EN-GJS-500-7,epoxy coated 250µm | |
| 10 | Dual bearing | Commercial | |
| 11 | Bush | Self-lubricating steel PTFE coated | Bronze + PTFE coated |
| 12 | Top sealing kits | POM+NBR | |
| 13 | O-ring | NBR | |
| 14 | Washer | PTFE | |
| 15 | Screws | A2 | |
| 16 | Locking Screws | A2 | |
| 17 | Set screws | A2 | |
| 18 | Screws | A2 | |
| 19 | Key | C45 | |
| 20 | Dual Bearing | Commercial |
Key Features
Hygienic Pin-less Disc Connection
Eliminates risk of corrosion and contamination, ensuring safe operation in potable water systems.
Low Torque Operation
Double bearing design reduces torque, lowering actuator requirements and improving operational efficiency.
Energy Efficient Flow Design
Minimized head loss reduces pump energy consumption and operational costs.
Flexible Installation
Supports vertical downward installation, suitable for complex pipeline systems.
Applications
Athena butterfly valves are widely used in:
- Water treatment plants
- Desalination systems
- Pump stations
- Irrigation networks
- Industrial cooling systems
- HAVC, Fire protection, CDU etc.
Dimensions and Weights-(with Handwheel)
| DN | PN | Weight (kg) | D (mm) | d (mm) | e1 (mm) | e2 (mm) | e3 (mm) | L (mm) | e5 (mm) | e6 (mm) | e7 (mm) | H (mm) | b (mm) |
| Face-to-Face dimension acc.to EN558 series 13 | |||||||||||||
| 200 | 10 | 46 | 295 | 300 | 180 | 190 | 222 | 152 | 52 | 195 | 552 | 340 | 145 |
| 16 | 47 | 295 | 300 | 180 | 190 | 222 | 152 | 52 | 195 | 552 | 340 | 145 | |
| 250 | 10 | 58 | 350 | 300 | 210 | 234 | 256 | 165 | 52 | 235 | 616 | 400 | 145 |
| 16 | 59 | 355 | 300 | 210 | 234 | 256 | 165 | 52 | 235 | 616 | 400 | 145 | |
| 300 | 10 | 55 | 400 | 300 | 235 | 270 | 298 | 178 | 55 | 280 | 683 | 445 | 150 |
| 16 | 60 | 410 | 300 | 243 | 288 | 322 | 178 | 55 | 280 | 715 | 460 | 150 | |
| 350 | 10 | 70 | 460 | 300 | 265 | 310 | 344 | 190 | 55 | 330 | 759 | 505 | 150 |
| 16 | 78 | 470 | 300 | 272 | 315 | 349 | 190 | 55 | 330 | 771 | 520 | 180 | |
| 400 | 10 | 91 | 515 | 300 | 295 | 340 | 374 | 216 | 55 | 375 | 819 | 565 | 200 |
| 16 | 108 | 525 | 300 | 307 | 359 | 397 | 216 | 69 | 375 | 854 | 580 | 200 | |
| 450 | 10 | 134 | 565 | 300 | 347 | 385 | 423 | 222 | 69 | 430 | 920 | 640 | 275 |
| 16 | 134 | 585 | 300 | 347 | 385 | 423 | 222 | 69 | 430 | 920 | 640 | 275 | |
| 500 | 10 | 142 | 620 | 400 | 350 | 410 | 452 | 229 | 69 | 480 | 1002 | 670 | 368 |
| 16 | 178 | 650 | 400 | 373 | 410 | 452 | 229 | 81 | 480 | 1025 | 715 | 368 | |
| 600 | 10 | 211 | 725 | 400 | 400 | 455 | 497 | 267 | 81 | 580 | 1097 | 780 | 400 |
| 16 | 293 | 770 | 400 | 428 | 504 | 555 | 267 | 104.5 | 580 | 1183 | 840 | 400 | |
| 700 | 10 | 318 | 840 | 400 | 480 | 550 | 601 | 292 | 104.5 | 675 | 1281 | 895 | 430 |
| 16 | 374 | 840 | 400 | 497 | 555 | 616 | 292 | 53 | 675 | 1313 | 910 | 430 | |
| 800 | 10 | 448 | 950 | 500 | 540 | 600 | 661 | 318 | 53 | 780 | 1451 | 1022 | 450 |
| 16 | 523 | 950 | 500 | 555 | 600 | 661 | 318 | 53 | 780 | 1466 | 1030 | 450 | |
| 900 | 10 | 580 | 1050 | 500 | 592 | 647 | 708 | 330 | 53 | 880 | 1550 | 1115 | 510 |
| 16 | 590 | 1050 | 600 | 626 | 665 | 730 | 330 | 130 | 880 | 1656 | 1125 | 536 | |
| ...... | |||||||||||||
| 1800 | 10 | 4347 | 2020 | 600 | 1195 | 1286 | 1398 | 670 | 256 | 1776 | 2893 | 2115 | 1013 |
| 16 | 4970 | 2020 | 800 | 1198 | 1335 | 1434 | 670 | 246 | 1776 | 3032 | 2130 | 1013 | |
For complete technical documentation, including datasheets, drawings, and project-based solutions, please contact us.
The RKSfluid team will provide fast and professional engineering support based on your application requirements.
Tag:
double eccentric butterfly valve
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,EPDM seat butterfly valve
,large diameter butterfly valves
,electric actuated butterfly valve
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,Water, Oil, Gas
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