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Help Center1. Trictly Passed Factory Hydrostatic Strength & Air Tightness Test; Support CCS, ABS, DNV, BV, LR Marine Classification Certificates.
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Shanghai Zhibang Valve Manufacture Co., Ltd (established in 2016) is a professional manufacturer specializing in high-quality valves for marine and industrial applications. Our product line includes valves that have strictly passed factory hydrostatic strength and air tightness tests, ensuring reliable performance under extreme conditions. We support major marine classification certificates such as CCS, ABS, DNV, BV, and LR, making our valves a trusted choice for shipbuilders and offshore operators worldwide. With an annual export value of US$1 million to US$1.5 million, we serve markets across North America, Europe, Asia, Africa, and Oceania, delivering products that meet rigorous international standards.
Our valves are designed to provide superior sealing, durability, and safety in demanding marine environments. Every unit undergoes a comprehensive factory test procedure that includes both hydrostatic strength testing (to verify pressure containment) and air tightness testing (to guarantee zero leakage). This dual-test approach ensures compliance with the most stringent classification society requirements. Whether you need a gate valve, globe valve, check valve, or ball valve, we can customize the material, pressure rating, size, and connection type to match your specific project needs.
Key Features & Technical Specifications
- Hydrostatic Strength Test: Each valve is tested at 1.5 times the rated pressure to verify structural integrity – no distortion or leakage allowed.
- Air Tightness Test: Low-pressure pneumatic test (0.6 MPa) detects any microscopic leaks, ensuring bubble-tight shut-off.
- Multiple Certification Options: We can provide valves certified by CCS, ABS, DNV, BV, or LR upon request – certificates are issued by the respective society.
- Wide Material Selection: Carbon steel (WCB, WCC), stainless steel (CF8, CF8M, 316L), duplex stainless steel, and bronze – choose as per your medium and environment.
- Pressure & Temperature Range: Available from PN10 to PN160 (or Class 150 to Class 900), with temperature ratings from -20°C to +400°C (customizable).
- End Connections: Flanged (ANSI, DIN, JIS), butt weld, socket weld, or threaded – flexible to fit your piping system.
- Actuation Options: Handwheel, gearbox, pneumatic actuator, or electric actuator – we can supply complete valve packages.
Typical Parameters (Example for a 6-inch Gate Valve)
| Parameter | Value |
|---|---|
| Size | 6 inches (DN150) |
| Pressure Rating | Class 150 (PN16) |
| Body Material | WCB (Carbon Steel) |
| Trim Material | 13Cr / SS304 / SS316 |
| Test Pressure (Hydrostatic) | 3.0 MPa (shell) |
| Test Pressure (Air Tightness) | 0.6 MPa |
| Certification | CCS, ABS, DNV, BV, LR (as requested) |
These parameters are for reference only – we can tailor the valve to your exact requirements. All our valves are manufactured under an ISO9001:2015 quality management system, ensuring consistent quality from raw material to final inspection.
Benefits to Your Business
- Reduced Risk of Leakage: The rigorous hydrostatic and air tightness tests guarantee a leak-free performance, minimizing downtime and maintenance costs.
- Compliance with Marine Regulations: With support for CCS, ABS, DNV, BV, and LR certificates, you can confidently use our valves in new builds and retrofits without additional testing.
- Longer Service Life: High-quality materials and precise machining extend the valve's operational life, even in seawater or corrosive media.
- Fast Delivery: Our factory in Shanghai ensures efficient production and shipping via major ports (Shanghai, Guangzhou, Hong Kong, Beijing).
- Cost-Effective Customization: We offer flexible design options without high engineering fees – just tell us your requirements.
Trust & Reliability
Since 2016, Shanghai Zhibang Valve Manufacture Co., Ltd has been serving a global customer base, exporting valves worth US$1 million to US$1.5 million annually. Our main markets cover North America, South America, Europe, Africa, Oceania, the Middle East, and Asia, including the domestic market. We have successfully delivered valves for numerous marine projects, including oil tankers, container ships, and offshore platforms. Our commitment to quality is backed by the ISO9001 certification and our factory's in-house testing capabilities. We invite you to experience the reliability of our factory-tested valves – contact us today for a quote or technical consultation. Let us be your trusted partner in marine valve solutions.
Frequently Asked Questions
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Q: What types of valves do you offer with hydrostatic and air tightness tests?
A: We offer gate valves, globe valves, check valves, ball valves, and butterfly valves – all can be factory tested and certified per your requirements. -
Q: Can you provide valves with both CCS and ABS certificates in one order?
A: Yes, we can support multiple classification societies simultaneously. Please specify which certificates you need when placing an order. -
Q: What is the typical lead time for custom valves?
A: For standard sizes and materials, lead time is 15-25 days. For special materials or large sizes, it may be 30-45 days. We will confirm after reviewing your specifications. -
Q: Do you provide material certificates (MTC) and test reports?
A: Absolutely. We provide mill test certificates for raw materials, as well as hydrostatic and air tightness test reports for each valve, along with the classification certificate. -
Q: What is the warranty period for your valves?
A: We offer a standard 12-month warranty from the date of shipment, covering manufacturing defects. Extended warranty is available upon request. -
Q: Can you manufacture valves with NACE or other special requirements?
A: Yes, we can customize valves to meet NACE MR0175, API 6D, or other standards upon request. Please share your specific requirements. -
Q: How do you ensure the tightness of the valve during the air test?
A: The air tightness test is performed at 0.6 MPa with the valve partially or fully closed. We use soap solution to check for any bubbles – zero leakage is required for acceptance. -
Q: What is the minimum order quantity (MOQ)?
A: For standard valves, MOQ is 1 piece. For custom designs, MOQ may be 2-5 pieces depending on complexity. We welcome small trial orders.
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