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Help CenterDual Plate Check Valve for LNG Ship, ASTM A352 LCB, PN1.6-4.0MPa, DN15-DN100, Full Port
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Shanghai Zhibang Valve Manufacture Co., Ltd. has been a trusted manufacturer of high-quality industrial valves since 2016. Our Dual Plate Check Valve for LNG Ship, manufactured in ASTM A352 LCB material, is specifically designed for demanding low-temperature and cryogenic applications in the marine and energy sectors. With pressure ratings from PN1.6 to PN4.0MPa and sizes ranging from DN15 to DN100, this full-port valve ensures minimal pressure drop and reliable backflow prevention. Built with precision and durability, it meets the rigorous requirements of liquefied natural gas (LNG) transport vessels, offering a robust sealing performance even under extreme conditions.
Key Product Features & Technical Specifications
- Full Port Design: The full-bore configuration ensures unrestricted flow, reducing turbulence and pressure loss – ideal for high-flow LNG systems.
- Dual Plate Spring-Assisted Closure: Two lightweight plates close quickly upon flow reversal, minimizing water hammer and protecting downstream equipment.
- Low-Temperature Compatibility: ASTM A352 LCB body and disc maintain excellent impact toughness and ductility down to -45°C (-50°F), fully compliant with LNG ship piping standards.
- Compact & Lightweight: The wafer-style body reduces installation space and weight, making it suitable for confined marine engine rooms and skid-mounted systems.
- Corrosion Resistance: Body and internal parts are treated for corrosion resistance in marine environments; optional PTFE or metal seal available for different media.
- Bi-Directional Sealing: Standard seal design ensures effective shut-off in both directions (depending on version).
Technical Parameter Table
| Parameter | Value / Range |
|---|---|
| Size Range | DN15 – DN100 (1/2" – 4") |
| Pressure Rating | PN1.6 – PN4.0 MPa (Class 150 – 300) |
| Body Material | ASTM A352 LCB |
| Disc Material | ASTM A352 LCB (hardened) |
| Seat Material | PTFE / Reinforced PTFE / Metal (customizable) |
| Application Temperature | -45°C to +120°C (-50°F to +250°F) depending on seal |
| Design Standard | API 594 / BS 5153 / GB/T 12236 (compliant) |
| Face-to-Face Dimension | API 594 / manufacturer standard |
| End Connection | Wafer, Flanged (to ANSI / DIN / JIS – optional) |
Benefits for LNG Ship Applications
- ✅ Reduced Installation Costs: Lightweight wafer design between flanges eliminates heavy flanges and extra support.
- ✅ Low Pressure Drop: Full port and streamlined flow path save energy in pumping systems.
- ✅ Low Maintenance: Spring-assisted closure mechanism has few moving parts; seat replacement is simple.
- ✅ Safety in Cryogenic Service: ASTM A352 LCB guarantees no brittle fracture at low temperatures, critical for LNG cargo handling.
- ✅ Global Compatibility: Available with various flange standards (ANSI, DIN, JIS, GB) to suit international shipbuilding requirements.
Shanghai Zhibang Valve Manufacture Co., Ltd. is an ISO9001 certified manufacturer with annual export value between US$1 Million and US$1.5 Million. Our valves are shipped from Shanghai, Guangzhou, Hong Kong, and Beijing ports to over 15 major markets including North America, South America, Europe, Southeast Asia, and Oceania. With a dedicated quality control system and experienced engineering team, each Dual Plate Check Valve undergoes rigorous hydrostatic and pneumatic testing before dispatch. We understand the critical nature of LNG marine applications and offer customization options such as special coatings, extended bonnets, and cryogenic extensions upon request. Choose Shanghai Zhibang for reliable, long-lasting valve solutions that meet your LNG ship specifications. Contact us today for a quote or technical consultation.
Frequently Asked Questions (FAQ)
Q1: What is the minimum operating temperature for this dual plate check valve?
A: Based on the ASTM A352 LCB material, the valve can safely operate down to -45°C (-50°F). For lower temperatures, please inquire about LCC or stainless steel options.
Q2: Can this valve be used for horizontal and vertical pipelines?
A: Yes, the dual plate spring mechanism allows installation in both horizontal and vertical (upward flow) positions. For vertical downward flow, a spring assist version is recommended.
Q3: What flange standards are available for this valve?
A: We offer flanges according to ANSI B16.5, DIN EN 1092-1, JIS B2220, and GB/T 9113. Please specify your requirement when ordering.
Q4: Is the valve suitable for LNG cargo tanks or only for ship pipelines?
A: It is designed primarily for ship piping systems (cargo handling, inert gas, etc.). For tank primary isolation, a different valve type may be required. Our engineers can advise based on your specific service.
Q5: How does the full port design affect the pressure drop?
A: The full port (full bore) design provides an unobstructed flow path, resulting in a very low pressure drop — typically less than 0.1 bar at nominal flow velocity. This is a significant advantage for LNG pumping efficiency.
Q6: What certifications do you have for marine valves?
A: Our quality management system is ISO9001 certified. For marine applications, we can provide material certificates (EN 10204 3.1), and the valves are manufactured in compliance with API 594 and relevant classification society requirements (DNV-GL, Lloyd's, etc.) upon request at additional cost.
Q7: Can the seat material be changed for abrasive media?
A: Yes, we offer optional metal seats (Stellite or 316 steel) for high-temperature or abrasive services. For LNG with clean media, PTFE is sufficient.
Q8: What is the typical lead time for DN50 size valves?
A: For standard sizes (DN15-DN100) with common materials, lead time is usually 2–4 weeks. Custom sizes or special materials may require 4–6 weeks. We can expedite urgent orders upon request.
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