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Help CenterCryogenic Marine Check Valve for Offshore FPSO, -196°C Service, SS316L, NACE MR0175
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Shanghai Zhibang Valve Manufacture Co., Ltd., established in 2016, is a professional valve manufacturer specializing in high-performance cryogenic solutions. Our Cryogenic Marine Check Valve for Offshore FPSO is designed to operate reliably at extreme temperatures down to -196°C, making it ideal for liquefied natural gas (LNG) processing, storage, and transportation aboard floating production storage and offloading units. Crafted from premium SS316L stainless steel and fully compliant with NACE MR0175 for sour service, this check valve ensures zero backflow, long service life, and maximum safety in the most demanding offshore environments.
With an annual export value exceeding USD 1 million, we have shipped thousands of valves to major markets including North America, Europe, Southeast Asia, and the Middle East. Our valves are manufactured under a strict ISO9001 quality management system, ensuring every unit meets international standards. Below, we detail the key features, technical specifications, and benefits that set our cryogenic check valve apart.
Product Features & Technical Specifications
- Extreme Low Temperature Service: Designed for continuous operation at -196°C, with optional cryogenic testing performed after assembly to ensure leak-tightness under thermal shock conditions.
- Superior Material Selection: Body, bonnet, disc, and spring are all made from SS316L (UNS S31603), offering excellent toughness, corrosion resistance, and low-temperature mechanical properties.
- NACE MR0175 Compliance: Suitable for sour gas environments containing H₂S, preventing sulfide stress cracking (SSC) and stress corrosion cracking (SCC).
- Non-Slam Design: The check valve features a guided disc with a soft closing mechanism or spring-assisted closure to minimize water hammer and pressure surges in high-velocity cryogenic lines.
- Versatile Connection Options: Available with raised face (RF), ring-type joint (RTJ) flanges per ASME B16.5, or butt-weld ends per ASME B16.25 to suit various piping systems.
- Full Bore & Reduced Bore Options: Choose full bore for minimal pressure drop or reduced bore for space and weight savings, both designed with low cracking pressure for sensitive applications.
- Extended Bonnet for Thermal Protection: An optional extended bonnet (cold box extension) protects the packing area from freezing and allows the stem/disc assembly to remain at a higher temperature, preventing ice formation.
- Rigorous Testing: Each valve undergoes hydrostatic shell test (1.5× design pressure), pneumatic seat test (1.1× design pressure), and cryogenic seat leakage test at -196°C as per API 598 or BS 6364.
Performance Parameters (Typical Data)
| Parameter | Value |
|---|---|
| Pressure Rating | Class 150 / 300 / 600 / 900 / 1500 / 2500 (PN 20 – PN 420) |
| Temperature Range | -196°C to +80°C (extended bonnet required for continuous -196°C) |
| Size Range | DN15 – DN600 (1/2" – 24") |
| Cracking Pressure | ≤ 0.05 bar (standard) or customized |
| Leakage Rate (Seat) | Zero leakage (Class VI per ISO 5208 / FCI 70-2) |
| Applicable Standards | API 602, BS 6364, ASME B16.34, ISO 17292 |
| Optional Features | Locking device, position indicator, thermal jacket, NACE MR0175 certification package |
Customer Benefits
- Reduced Maintenance Costs: The robust SS316L construction and corrosion-resistant internals extend valve life even in the presence of moisture, chlorides, and sour gas, lowering total cost of ownership.
- Enhanced Safety in Offshore Systems: The non-slam characteristic prevents dangerous pressure surges that could damage piping and equipment, while the NACE MR0175 compliance guarantees integrity in H₂S-containing process streams.
- Easy Integration: Standard flange dimensions and multiple connection types allow direct replacement of existing check valves without piping modifications. Available with cryogenic extension bonnet as required.
- Reliable Performance at Extreme Temperatures: Our valves have been successfully deployed in LNG carrier cargo tanks, FPSO topping plants, and cryogenic storage terminals worldwide.
- Full Traceability: Each valve is marked with serial number, material heat codes, and test records. We provide a comprehensive document package including MTR, NACE certificate, and test reports.
Trust & Why Choose Shanghai Zhibang
As an ISO9001-certified manufacturer since 2016, Shanghai Zhibang Valve Co., Ltd. has built a strong reputation for supplying high-quality industrial valves to over 15 countries across both hemispheres. Our annual export value of US$1 million – US$1.5 million reflects consistent demand from major oil & gas contractors, EPC firms, and marine operators. Our main markets include North America, South America, Europe, Southeast Asia, Africa, Oceania, and the Middle East — highlighting the global acceptance of our products.
We offer customizable solutions for size, pressure rating, facing, and supplementary testing (e.g., low-temperature impact testing, PMI). All valves can be shipped from Shanghai, Guangzhou, Hong Kong, or Beijing ports, ensuring fast delivery to international customers. Whether you need a single unit for a retrofit or a batch order for a new FPSO project, our team is ready to provide technical support, competitive pricing, and on-time delivery.
Contact us today for a quote or technical datasheet. We are confident that our cryogenic marine check valve will meet your most stringent requirements for safety, durability, and cryogenic performance.
Frequently Asked Questions (FAQ)
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Q1: Can this check valve be used for LNG at -162°C?
Yes, absolutely. The valve is rated for -196°C, which exceeds LNG’s boiling temperature of -162°C. Standard design includes a cold box extension to protect the gland area from frost. -
Q2: Does the SS316L material meet NACE MR0175 for Sour Service?
Yes, our SS316L material is supplied with heat treatment and hardness control as per NACE MR0175/ISO 15156-3. A material certificate confirming H₂S resistance is provided with each order. -
Q3: What is the standard delivery time for a batch of 20 units?
For standard sizes (DN50–DN200), lead time is typically 4–6 weeks after order confirmation. Larger sizes or special testing may require 8–10 weeks. We can also arrange urgent partial shipments. -
Q4: Do you offer the extended bonnet option?
Yes, extended bonnets (also called cold box extensions) are available in different lengths from 150 mm to 500 mm to ensure the packing area remains above freezing. Please specify your required extension length when ordering. -
Q5: Is the valve bidirectional?
No, a check valve is a unidirectional device. It prevents backflow in the intended flow direction. Ensure correct installation with the arrow on the body pointing downstream. -
Q6: Can you supply with butt-weld ends instead of flanges?
Yes, we offer butt-weld ends per ASME B16.25 for both socket weld and butt weld. Please specify the pipe schedule (e.g., SCH 10S, SCH 40S, or SCH 80S) for proper wall thickness match. -
Q7: Does the valve have a spring for assisted closing?
The standard design includes a spring to ensure positive closure at low flow velocities. For very low cracking pressure applications, a spring-free version can be provided (consult with our engineering team). -
Q8: What certifications come with the valve?
Each valve ships with ISO9001 certificate, material test report (MTR) with chemical and mechanical properties, NACE MR0175 compliance statement, hydrostatic and pneumatic test certificates, and cryogenic leak test report (if ordered). Additional third-party inspection (e.g., Lloyd’s, DNV) can be arranged at extra cost.
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