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Help CenterLNG Marine Low Temperature Check Valve -196℃, Used for Cryogenic Fluid Lines, Stainless Steel Body, Flanged, DN15-DN100, PN1.6-4.0MPa
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Shanghai Zhibang Valve Manufacture Co., Ltd., established in 2016 and headquartered in Shanghai, China, is a specialized manufacturer of high-performance industrial valves. With over US$1 million in annual export value and a global footprint spanning North America, Europe, Southeast Asia, and the Middle East, we bring years of expertise to every product. Our LNG Marine Low Temperature Check Valve is designed to withstand extreme cryogenic conditions down to -196°C, making it the ideal choice for safe, reliable one-direction flow control in liquefied natural gas and other cryogenic fluid lines. Engineered with a full stainless steel body and flanged connections, this valve delivers exceptional durability and leak-tight performance in demanding marine and industrial environments.
This check valve is specifically constructed to prevent backflow in cryogenic piping systems where temperatures plunge to -196°C. The valve’s stainless steel construction (CF8, CF8M, or 316L) ensures resistance to thermal shock, corrosion, and embrittlement. Its compact flanged design (RF or FF facing) allows easy installation in existing pipelines. Available from DN15 to DN100 with pressure ratings from PN1.6 to 4.0 MPa, our check valve meets the rigorous demands of LNG carriers, liquefaction plants, and storage terminals. Every unit is tested for cryogenic service verification, guaranteeing consistent performance even under severe thermal cycles.
Key Features & Technical Specifications
- Cryogenic-rated design: Suitable for media such as LNG, liquid nitrogen, liquid oxygen, and liquid argon at -196°C.
- Full stainless steel body: Eliminates cold cracking and maintains toughness at ultra-low temperatures.
- Flanged ends: Easy bolt-on installation; available with RF or FF gasket surfaces.
- Wide size & pressure range: DN15–DN100 (1/2″–4″), PN1.6–4.0 MPa (Class 150–300).
- Low pressure drop: Optimized flow path reduces energy loss during normal operation.
- Quick closing action: Prevents water hammer and protects downstream equipment.
- Leak-tight shut-off: Metal-to-metal or optional soft seal for zero backflow.
- ISO9001 quality system: Manufactured under strict quality control from raw material to final test.
| Parameter | Value |
| Body Material | Stainless Steel (CF8, CF8M, 316L) |
| Design Temperature | -196°C to +80°C |
| Connection | Flanged (RF or FF) |
| Size Range | DN15 – DN100 (1/2″ – 4″) |
| Pressure Rating | PN1.6 – 4.0 MPa (Class 150 – 300) |
| Type | Swing check / Lift check (customizable) |
| Seat Seal | Metal-to-metal or PTFE/PCTFE soft seal |
| Applicable Standards | GB/T 24925, BS 6364, or equivalent cryogenic valve standards |
Customer Benefits
- Enhanced safety: Reliable backflow prevention prevents reverse flow of cryogenic liquids, reducing risk of line damage or personnel injury.
- Long service life: Stainless steel body and cryogenic-grade internals resist thermal fatigue and corrosion, minimizing maintenance downtime.
- Energy efficiency: Low-pressure-drop design helps maintain system pressure, saving pump energy and operating costs.
- Easy integration: Flanged connections match standard piping flanges, simplifying retrofit or new installation.
- Global compliance: Designed in accordance with international cryogenic valve standards, acceptable for marine and industrial approvals (e.g., ABS, DNV, CCS – verification available upon request).
At Shanghai Zhibang Valve, we take quality seriously. Our ISO9001-certified manufacturing facility in Shanghai ensures every valve undergoes rigorous inspection, including cryogenic soaking tests, shell hydrostatic tests, and seat leak tests. With over 1 million US dollars in annual exports and a customer base across more than 10 countries and regions, we have proven our reliability in the most challenging cryogenic applications. Whether you are building an LNG carrier, expanding a liquefaction plant, or maintaining a marine fuel system, our check valve delivers the performance and peace of mind you need.
Contact us today for a quotation, technical data sheet, or sample order. Our team is ready to support your project with custom options (extended bonnet, spring-loaded disc, etc.) to meet your exact requirements. Choose Zhibang – your partner in cryogenic flow control.
Frequently Asked Questions (FAQ)
1. Can this valve be used for temperatures below -196°C?
Our standard design is rated for -196°C. For lower temperatures (e.g., -269°C for liquid helium), special materials and design modifications are available – please consult our engineering team for custom solutions.
2. What is the maximum working pressure for the DN100 size?
For DN100, the standard pressure rating is PN4.0 MPa (Class 300). Higher pressure ratings can be provided upon request, depending on material and design constraints.
3. Do you offer soft-seated (zero leakage) versions?
Yes, we offer an optional soft seal with PCTFE or PEEK seat insert for bubble-tight shutoff at cryogenic temperatures. Metal-to-metal seats are also available for applications where minor leakage is acceptable.
4. What certifications do you have for marine applications?
Our factory is ISO9001 certified. Type approvals from classification societies (ABS, DNV, Lloyd’s, CCS) can be supplied as optional third-party certifications – please specify your requirement in your inquiry.
5. What is the typical lead time for standard sizes?
For common sizes (DN50, DN80) and standard materials, lead time is approximately 15–25 working days after order confirmation. Custom or large orders may require longer – we will provide a confirmed schedule with your quote.
6. Can this check valve be installed vertically?
Our swing check design is generally recommended for horizontal pipelines or vertical upward flow. For vertical downward flow, a spring-loaded or lift check design is preferable. We can supply the appropriate type based on your installation orientation.
7. How do you ensure no leakage at cryogenic temperatures?
Every valve undergoes a 100% cryogenic test: after being cooled to -196°C with liquid nitrogen, we perform a seat leakage test per standard requirements. Only valves meeting the allowable leakage rate (or zero leakage for soft seat) are shipped.
8. What is the warranty period?
We offer a standard 12-month warranty from the date of shipment against manufacturing defects. Extended warranty options are available upon request.
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