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Help CenterMarine Gate Valve in Carbon Steel for Shipboard Steam and Water Service, GB/T Compliant
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Shanghai Zhibang Valve Manufacture Co., Ltd is a professional manufacturer established in 2016, specializing in high-quality marine valves. Our Marine Gate Valve in Carbon Steel for Shipboard Steam and Water Service, GB/T Compliant is designed to meet the rigorous demands of shipboard piping systems, ensuring reliable shut-off and flow control for steam, water, and other media. With an annual export value of US$1–1.5 million, we serve global markets including North America, Europe, Southeast Asia, and Oceania, delivering products that combine durability, safety, and compliance with industry standards.
This gate valve is manufactured from high-quality carbon steel (ASTM A216 WCB or equivalent), providing excellent strength and corrosion resistance in marine environments. It is fully compliant with GB/T standards (such as GB/T 12234), making it suitable for shipboard applications where reliability is critical. The valve features a robust construction, including a rising stem (OS&Y) design for visual indication of valve position, and a wedge-type gate that ensures a tight seal even under high pressure.
Key Features
- Material: Carbon steel body and bonnet, available in WCB, WCC, or LCB grades for low-temperature service.
- Sealing: Metal-to-metal seating surfaces, with optional Stellite overlays for enhanced wear resistance and long service life.
- Operation: Handwheel, gearbox, or pneumatic actuator options available upon request.
- Pressure Ratings: PN10, PN16, PN25, PN40 (or Class150, Class300), suitable for steam and water systems.
- Connections: Flanged ends (RF, FF, RTJ) as standard; threaded or welded ends are customizable.
- Standards: Designed and tested per GB/T 12234, GB/T 13927, and ISO 5208 for pressure testing.
- Certifications: Manufactured under ISO9001 quality management system (certified).
- Application: Ideal for shipboard steam lines, cooling water, ballast water, and fire-fighting systems.
Technical Specifications
| Size Range | DN50 – DN600 (2" – 24") |
| Pressure Rating | PN10 – PN40 / Class150 – Class300 |
| Working Temperature | -29°C to +425°C (depending on material) |
| Body & Bonnet | Carbon Steel (ASTM A216 WCB) |
| Stem | Stainless Steel (AISI 420 or 304) |
| Seat Seal | Metal-to-Metal (optional Stellite) |
| Testing Standard | GB/T 13927, ISO 5208 (hydrostatic & pneumatic) |
| Available Ends | Flanged (RF/FF), Butt Weld, Socket Weld, Threaded |
Why choose our Marine Gate Valve? This valve is engineered for long-term reliability in harsh shipboard environments. The carbon steel construction offers excellent mechanical properties, while the GB/T compliance ensures compatibility with Chinese-classed vessels. Our production facility in Shanghai holds ISO9001 certification, guaranteeing consistent quality control from raw material to final testing. Each valve undergoes 100% pressure testing before shipment. We also offer customized solutions, such as special end connections, coatings, or extended stem lengths for remote operation.
Applications: Our marine gate valves are widely used in cargo ships, tankers, bulk carriers, and offshore platforms for steam heating systems, freshwater and seawater lines, bilge systems, and deck service. They are also suitable for land-based industrial steam and water systems.
Trust & Support
Shanghai Zhibang Valve has been a reliable partner for global buyers since 2016. With an annual export value exceeding US$1 million, we ship our products from Shanghai, Guangzhou, Hong Kong, and Beijing to major markets across five continents. Our team provides prompt technical support, fast quotation, and flexible logistics. We understand the critical nature of marine valves and ensure that every order meets the required specifications and delivery schedules.
Contact us today for more details, or request a quote. Our experienced sales engineers can help you select the right valve model and configuration for your specific shipboard steam and water service. We look forward to a long-term partnership with you.
Frequently Asked Questions (FAQ)
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Q: Is this valve suitable for seawater?
A: Yes, but the standard carbon steel version is recommended for freshwater and steam. For seawater service, we can supply valves with epoxy coating or with bronze trim. Contact us for customization. -
Q: What pressure testing do you perform?
A: Each valve is hydrostatically tested at 1.5 times the rated pressure (shell test) and 1.1 times (seat test) per GB/T 13927 and ISO 5208. Pneumatic tests are available upon request. -
Q: Can I get a rising stem or non-rising stem version?
A: Both rising stem (OS&Y) and non-rising stem designs are available. The rising stem provides visual indication, while non-rising is preferred for limited vertical space. -
Q: Do you provide third-party inspection?
A: Yes, we can arrange inspection by classification societies (e.g., CCS, ABS, DNV, Lloyd's) or other third-party agencies at additional cost. Please specify your requirements. -
Q: What is the typical lead time?
A: For standard sizes (DN50-300), lead time is about 15–25 working days after order confirmation. Larger sizes or special materials may take 30–45 days. -
Q: Do you offer OEM or private labeling?
A: Yes, we can customize valve body markings, nameplates, and packaging according to your brand requirements. Minimum order quantity may apply. -
Q: What payment terms do you accept?
A: We accept T/T, L/C, Western Union, and other negotiated methods. Typical terms are 30% deposit and 70% balance before shipment. -
Q: Are spare parts available?
A: Yes, we can supply spare parts such as gaskets, seat rings, and stem packing. Please provide the valve model and size when inquiring.
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