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Help CenterHigh Pressure Overboard Boiler Discharge Valve for Shipbuilding Industry - CB/T3841-1999
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CBT3841 High Pressure Marine Boiler Flange Discharge Valve Rated for 150 PSINegotiableMOQ: 20 Units
As a leading ISO9001-certified valve manufacturer since 2016, Shanghai Zhibang delivers precision-engineered High Pressure Overboard Boiler Discharge Valves designed for critical marine applications. Our CB/T3841-1999 compliant valves ensure operational safety in extreme conditions while preventing backflow contamination. With over $1.5M annual exports to global maritime markets, we provide:
- Rugged construction for 20,000+ cycles
- Zero-leak performance at 425°C
- Custom configurations for vessel-specific layouts
Technical Specifications
| Design Standard | CB/T3841-1999 |
| Pressure Classes | PN16, PN25, PN40 |
| Flow Coefficient (Cv) | 15-280 depending on DN size |
| Test Pressure | 1.5x working pressure |
The forged 316L stainless steel body withstands corrosive seawater environments while precision-machined seats maintain bubble-tight shutoff. Key operational advantages include:
- Emergency Fail-Safe Design: Automatic closure during pressure drop incidents
- Low-Torque Operation: 30% reduced actuation force versus standard valves
- Maintenance-Friendly: Top-entry design enables in-line servicing
Our valves undergo rigorous quality verification including:
- Hydrostatic shell tests at 22.5 bar (for PN16)
- High-cycle endurance testing (5,000+ open/close cycles)
- Salt spray corrosion resistance validation (1000hrs ASTM B117)
With shipments from Shanghai, Guangzhou, Hong Kong, and Beijing ports, we serve shipbuilders across 6 continents. Over 78% of our marine valves remain in service beyond 10-year lifecycle expectations. Contact our engineering team today for:
- Class-approved technical documentation packages
- Vessel-specific metallurgical recommendations
- Competitive bulk procurement programs
FAQ
Q: Are custom face-to-face dimensions available?
A: Yes, we accommodate non-standard flange distances per EN 1092-1 specifications.
Q: What documentation accompanies delivery?
A: Each valve ships with material certs (3.1), pressure test records, and compliance statement.
Q: Do you provide actuation accessories?
A: Pneumatic, hydraulic, or manual gear operators available upon request.
Q: What is the lead time for DN150 valves?
A: Standard configurations ship in 18 working days; express 12-day production available.
Q: How does your valve prevent seawater backflow?
A: Our dual-sealing design incorporates a primary metal seat + secondary resilient seal.
Q: Are your products suitable for LNG carrier applications?
A: Special cryogenic versions rated for -196°C service are available.
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