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Help CenterStainless Steel Low Temp Check Valve for Marine, Temp -196℃, Extended Stem, Flanged, PN1.6-4.0MPa, Size 1/2"-4", LR Type Approved
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Shanghai Zhibang Valve Manufacture Co., Ltd. is proud to present our Stainless Steel Low Temp Check Valve for Marine — a high-performance, cryogenic-rated check valve designed to operate reliably at temperatures as low as -196°C. As a dedicated manufacturer since 2016, we have supplied over 50,000 units to global marine and energy sectors, with annual export values exceeding US$1 Million. This valve combines extended stem design, flanged connections, and LR type approval to meet the strictest requirements of marine and low-temperature applications.
Every unit is fabricated from premium stainless steel (CF8/CF8M or F304/F316L) to ensure excellent corrosion resistance and mechanical strength in harsh maritime environments. The extended stem allows the valve operator to be positioned away from the cold zone, preventing icing and facilitating safe manual override. With pressure ratings from PN1.6 to PN4.0 MPa and sizes ranging from 1/2" to 4", this check valve offers versatility for a wide array of piping systems aboard vessels and LNG facilities.
Below we detail the key features, technical specifications, and customer benefits that make this valve the preferred choice for marine engineers and procurement professionals.
Key Features & Benefits
- Cryogenic Capability: Specially designed for service down to -196°C, with materials selected to maintain impact toughness and sealing integrity.
- Extended Stem Design: Lifts the operating handle or actuator away from the cold pipe, reducing heat ingress and preventing ice buildup — ideal for marine cryogenic systems.
- Flanged End Connections: Available in RF (raised face) or FF (flat face) flanges per ASME B16.5, ensuring leak-tight joints and easy installation.
- Multiple Pressure Ratings: Covers PN1.6, PN2.5, PN4.0 MPa (Class 150/300 equivalent), adaptable to various system pressures.
- Full-Port Design: Reduces flow resistance and pressure drop, enhancing overall system efficiency.
- Reverse Flow Prevention: Reliable disc closure prevents backflow, protecting pumps and compressors downstream.
- LR Type Approved: This valve holds Lloyd's Register type approval (specific models), confirming compliance with international marine classification rules.
- Low Maintenance: Simple internal construction with few moving parts, easy to inspect and repair in the field.
Technical Specifications
| Parameter | Value / Range |
| Material - Body & Disc | Stainless Steel (CF8/CF8M / F304/F316L) |
| Connection Type | Flanged (Raised Face / Flat Face) |
| Size Range | 1/2" – 4" (DN15 – DN100) |
| Pressure Rating | PN1.6 / PN2.5 / PN4.0 MPa |
| Temperature Range | -196°C ~ +80°C (customizable for higher temperatures) |
| Disc Type | Swing / Lift (optional; standard swing check with extended stem) |
| Seat Material | PTFE / PCTFE / PEEK (for low temperature sealing) |
| Applicable Standards | API 602, BS 5352, GB/T 12236, LR Type Approval |
The table above shows standard configurations. Customization options are available upon request, including different flange facings, extended stem lengths, and special testing (helium leak test, cryogenic test).
Trusted by Global Marine Operators
Shanghai Zhibang Valve Manufacture Co., Ltd. has been delivering high-quality valves since 2016. Our ISO9001:2015 certified factory ensures consistent production quality and traceability. With an annual export value between US$1 Million and US$1.5 Million, we supply to over 20 countries including major markets in North America, Europe, Southeast Asia, and Oceania. Every valve we ship is subjected to rigorous hydrostatic and pneumatic testing, and we offer comprehensive documentation (material certificates, test reports, LR certificates) to support your procurement requirements.
Why choose our low temp check valve? Because it combines proven marine approval, cryogenic reliability, and competitive pricing — backed by a manufacturer who understands your operational needs. We also provide on-time delivery from our Shanghai warehouse, with flexible shipping via Shanghai, Guangzhou, Hong Kong, or Beijing ports.
Contact us today for a quote, technical datasheet, or to discuss your custom requirements. We're ready to support your marine cryogenic projects with valves you can trust.
Frequently Asked Questions (FAQ)
Q1: What materials are used for the valve body at -196°C?
A1: The body and disc are made of stainless steel grades such as CF8, CF8M, F304, or F316L, which retain excellent toughness and corrosion resistance at cryogenic temperatures. Seals are typically PTFE, PCTFE, or PEEK, selected for low-temperature sealing performance.
Q2: Is the extended stem always required for low temperature applications?
A2: The extended stem is highly recommended for -196°C service to isolate the operator from the cold zone, reduce ice formation, and prevent frostbite. Our standard design includes this feature, but other stem lengths are available upon request.
Q3: What is the maximum pressure rating of this check valve?
A3: The valve is available in ratings PN1.6, PN2.5, and PN4.0 MPa (approximately Class 150, 200, and 300). For higher pressures, please contact us for a custom design.
Q4: Do you provide LR type approval for all sizes?
A4: LR type approval (Lloyd's Register) is applicable to specific models and sizes within the 1/2" to 4" range. Please confirm the required size and rating with our sales team to ensure certification coverage.
Q5: Can this valve be used in LNG (liquefied natural gas) service?
A5: Yes, the valve is suitable for LNG and other cryogenic liquids like liquid nitrogen and oxygen, provided the operating temperature stays within -196°C to +80°C. It meets the requirements of marine and onshore cryogenic systems.
Q6: What flange standards do you follow?
A6: Flanges conform to ASME B16.5 (Class 150/300) or GB/T 9113 for Chinese standard. We can also manufacture to EN 1092-1 upon request. Both raised face (RF) and flat face (FF) options are available.
Q7: What testing do you perform before shipment?
A7: Each valve undergoes hydrostatic shell test (1.5x design pressure) and pneumatic seat test at 1.1x design pressure. For cryogenic service, we can perform additional low-temperature leakage tests as an optional service.
Q8: How long is the delivery time?
A8: Standard sizes (1/2" to 2") are typically available from stock with 7–10 working days delivery. Larger sizes or special materials may require 20–25 working days. We ship via Shanghai, Guangzhou, Hong Kong, or Beijing ports.
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