China Marine Butterfly Valve V Type JIS 5K/10K - Lightweight and Corrosion-Resistant, Suppliers & Factory Solutions
Technical Specifications & Pressure Test
| Pressure test | 5K | 10K | |
|---|---|---|---|
| Shell | 7.5bar | 15bar | |
| Seal | Water | 5.5bar | 11bar |
| Air | 6bar | 6bar | |
| Working Temperature | -20~120℃ | ||
Material List
| No. | Part Name | Materials | |
|---|---|---|---|
| 1 | Body | DI | |
| 2 | Bottom shaft | SS410 | |
| 3 | Disc | CF8 | |
| 4 | Upper shaft | SS410 | |
| 5 | Seat | EPDM | |
| 6 | Bushing | Polymer | |
| 7 | O ring | EPDM | |
| 8 | Wormgear | DI | |
Dimensions Data (mm)
| DN | L | A | B | ∅E | ∅F | n-∅d1 | 5K | 10K | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ØD | ØD1 | n-Ød | ∅D | ∅D1 | N-∅d | |||||||
| 50 | 40 | 130 | 83 | 65 | 50 | 4-∅8 | 130 | 105 | 4-15 | 155 | 120 | 4-19 |
| 65 | 40 | 140 | 93 | 65 | 50 | 4-∅8 | 155 | 130 | 4-15 | 175 | 140 | 4-19 |
| 80 | 60 | 149 | 100 | 65 | 50 | 4-∅8 | 180 | 145 | 4-19 | 185 | 150 | 8-19 |
| 100 | 60 | 156 | 110 | 90 | 70 | 4-∅10 | 200 | 165 | 8-19 | 210 | 175 | 8-19 |
| 125 | 60 | 177 | 125 | 90 | 70 | 4-∅10 | 235 | 200 | 8-19 | 250 | 210 | 8-23 |
| 150 | 70 | 200 | 143 | 90 | 70 | 4-∅10 | 265 | 230 | 8-19 | 280 | 240 | 8-23 |
| 200 | 80 | 225 | 170 | 125 | 102 | 4-∅12 | 320 | 280 | 8-23 | 330 | 290 | 12-23 |
| 250 | 90 | 280 | 203 | 125 | 102 | 4-∅12 | 385 | 345 | 12-23 | 400 | 355 | 12-25 |
| 300 | 90 | 309 | 230 | 125 | 102 | 4-∅12 | 430 | 390 | 12-23 | 445 | 400 | 16-25 |
| 350 | 100 | 325 | 260 | 125 | 102 | 4-∅12 | 480 | 435 | 12-25 | 490 | 445 | 16-25 |
| 400 | 110 | 371 | 290 | 175 | 140 | 4-∅18 | 540 | 495 | 16-25 | 560 | 510 | 16-27 |
| 450 | 130 | 392 | 330 | 175 | 140 | 4-∅18 | 605 | 555 | 16-25 | 620 | 565 | 20-27 |
| 500 | 140 | 431 | 358 | 175 | 140 | 4-∅18 | 655 | 605 | 20-25 | 675 | 620 | 20-27 |
Typical Marine Application Scenarios
1. Ballast Water System
As one of the most widely applied scenarios, the ballast water system transports sediment-laden seawater under normal temperature and low pressure. Concentric wafer-type soft seal butterfly valves with EPDM seals and 316L stainless steel or ductile iron valve bodies are primarily adopted to balance cost, corrosion resistance and sealing performance.
2. Seawater & Fresh Water Cooling
Affected by strong seawater corrosion and medium pressure, this system mainly uses double eccentric soft seal butterfly valves with aluminum bronze or 316L stainless steel valve bodies to ensure long-term stable heat exchange and cooling efficiency.
3. Bilge and Sewage System
Facing media containing oil stains and impurities, the system adopts concentric soft seal butterfly valves with oil-resistant NBR/EPDM seals, featuring good anti-fouling performance and convenient daily maintenance.
4. Marine Fire-fighting System
Requiring rapid emergency switching and reliable tightness, flange-type soft seal butterfly valves with epoxy-coated ductile iron are applied to resist pipeline vibration and ensure safe and efficient water supply in emergency situations.
5. Fuel & Lubricating Oil System
For flammable and explosive oil media, double eccentric metal hard seal or FKM soft seal butterfly valves are selected to meet fireproof, high-temperature resistant and safe cut-off requirements.
6. Ventilation and HVAC System
Lightweight concentric wafer-type butterfly valves are widely used for air volume regulation and pipeline isolation, thanks to their low flow resistance and space-saving installation advantages.
7. Special Extreme Conditions
Triple eccentric metal hard seal butterfly valves are applied to high-temperature flue gas and desulfurization systems, while food-grade sanitary butterfly valves are used for ship domestic fresh water systems.
Frequently Asked Questions (FAQ)
What is the working temperature range for these marine valves?
The working temperature for our marine butterfly valves ranges from -20℃ to 120℃, making them suitable for various marine applications.
What materials are typically used for the valve body?
Depending on the specific application, the valve body is constructed from durable materials such as Ductile Iron (DI), 316L stainless steel, or aluminum bronze to ensure excellent corrosion resistance.
Which valve type is recommended for ballast water systems?
Concentric wafer-type soft seal butterfly valves with EPDM seals are primarily adopted for ballast water systems to perfectly balance cost, corrosion resistance, and sealing performance.
How are the valves tested for pressure and sealing?
The valves undergo rigorous pressure testing. For a 10K requirement, the shell is tested up to 15bar, while the seal is tested with water at 11bar and air at 6bar.
What is the best valve solution for marine fire-fighting systems?
Flange-type soft seal butterfly valves with epoxy-coated ductile iron are highly recommended. They effectively resist pipeline vibration and ensure a reliable, safe water supply during emergencies.
Are there specific valves designed for fuel and lubricating oil systems?
Yes, for flammable oil media, we select double eccentric metal hard seal or FKM soft seal butterfly valves to meet strict fireproof and high-temperature resistant requirements.