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Home > Industrial Equipment & Components > Valve > Gate Valve > Marine Low Temperature Gate Valve With Mill Test Report, -196℃ Operation

Marine Low Temperature Gate Valve With Mill Test Report, -196℃ Operation

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Marine Low Temperature Gate Valve With Mill Test Report, -196℃ Operation photo-5

Product Spotlights

Engineered for extreme cryogenic service down to -196℃, this marine gate valve ensures safe, reliable isolation of LNG and other liquefied gases. Key features include an extended bonnet to prevent packing freeze-up, robust stainless steel or low-temp carbon steel construction, and flexible/solid wedge design for leak-tight sealing. Each valve comes with a full Mill Test Report for material traceability, supporting compliance with international marine and process standards. Ideal for LNG carriers, storage, and processing facilities demanding durability and safety in ultra-low temperature environments.

Negotiable MOQ: 1 Unit (Price negotiable depending on order volume and customization)

Key Specifications

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Material:

Other, Stainless Steel (304/316/L) or Carbon Steel

Application:

Other, LNG Carriers

Operation Temperature:

-196℃ to +80℃

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Shanghai Zhibang Valve Manufacture Co.,ltd

1Yr

Payment & Shipping

Payment Methods:

Port of Shipment:

China

Delivery Detail:

Delivery time depends on order quantity.

Product Details
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Material Other, Stainless Steel (304/316/L) or Carbon Steel

Application Other, LNG Carriers

Operation Temperature -196℃ to +80℃

Connection Type Flanged, Threaded, or Welded Ends

Size Range DN15 to DN600 (1/2“ to 24“)

Pressure Rating Class 150 to Class 1500 (PN16 to PN250)

Seat Design Flexible Wedge or Solid Wedge

Actuation Type Manual Handwheel, Gear Operator, or Pneumatic

Testing Standard API 598, API 6D, ISO 5208

Documentation Mill Test Report (MTR) Provided

As a specialized manufacturer with years of experience in the valve industry, Shanghai Zhibang Valve Manufacture Co., Ltd. is proud to present our high-performance Marine Low Temperature Gate Valve. Engineered to operate reliably in extreme cryogenic environments down to -196℃, this valve is a critical component for the safe and efficient handling of liquefied gases such as LNG, liquid nitrogen, and liquid oxygen on marine vessels and offshore installations. We combine stringent manufacturing controls under our ISO9001 certification with a deep understanding of the challenges faced in maritime applications, delivering a product that meets the exacting standards of global shipyards and energy companies.

Our commitment is to provide valves that ensure operational integrity, minimize maintenance downtime, and enhance safety protocols in some of the world's most demanding industrial settings.

Core Product Features & Technical Advantages:

Superior Cryogenic Material Engineering: The valve body, bonnet, stem, and wedge are manufactured from specially selected austenitic stainless steels (304, 304L, 316, 316L) or low-temperature carbon steels. These materials retain toughness and ductility at ultra-low temperatures, preventing brittle fracture and ensuring long-term sealing performance.
Extended Bonnet Design: A key feature for cryogenic service is the extended, insulated bonnet. This design creates a "cold box" effect, keeping the stem packing and actuation components at a higher, ambient temperature level. This prevents packing freeze-up, allows for smooth operation, and protects personnel from direct contact with cryogenic fluids.
Leak-Tight Sealing for Safety: The valve utilizes a flexible wedge or a specially designed solid wedge with a seal-welded seat. This ensures bubble-tight shut-off even after thermal cycling between extreme cold and ambient conditions, which is critical for preventing hazardous gas leaks on ships and in processing plants.
Comprehensive Quality Documentation: Each valve is supplied with a complete Mill Test Report (MTR). This traceable documentation includes chemical analysis, mechanical property tests, and non-destructive examination reports for the materials used, providing full transparency and compliance with project specifications.

Detailed Technical Specifications:

Design & Standards	API 600, BS 6364, MSS SP-134, ISO 28921-1 (Cryogenic Valves)
Temperature Range	-196℃ (-320℉) to +80℃ (+176℉)
Pressure Class	Commonly available in Class 150, 300, 600, 900, 1500 (ANSI) or PN16, PN25, PN40, PN63, PN100, PN160, PN250 (DIN)
End Connection	RF (Raised Face) Flanges per ASME B16.5, RTJ (Ring Type Joint), BW (Butt Weld) ends, or NPT Threaded.
Stem Design	Rising Stem, Outside Screw & Yoke (OS&Y) for clear visual indication of open/closed position.
Packing & Gasketing	Graphite-based spiral-wound gaskets and flexible graphite packing, suitable for wide temperature ranges.

Benefits for Your Operations:

Enhanced Maritime Safety: Reliable isolation of cryogenic fluids reduces the risk of leaks, spills, and potential ignition hazards, protecting both crew and valuable cargo.
Reduced Lifecycle Cost: Robust construction and appropriate material selection lead to exceptional durability, lowering the total cost of ownership through reduced replacement frequency and maintenance needs.
Global Compliance & Traceability: The provided MTR and adherence to international design standards (API, BS, ISO) facilitate easier approval processes for ship classification societies (ABS, DNV, LR, etc.) and end-user audits.
Operational Flexibility: Available in a wide range of sizes and pressure ratings, these valves can be configured for various duties on LNG carriers, including tank filling/discharge lines, vapor return lines, and interconnecting pipelines.

Shanghai Zhibang Valve Manufacture Co., Ltd. has established a strong track record since 2016, exporting high-quality industrial valves to markets across North America, Europe, Southeast Asia, and beyond, with an annual export value reaching up to US$1.5 million. Our ISO9001-certified quality management system governs every step of production, from raw material sourcing to final testing. This commitment to quality, combined with our strategic shipment ports in Shanghai, Guangzhou, Hong Kong, and Beijing, ensures reliable and timely delivery to your project site anywhere in the world. For a critical component that demands absolute reliability at -196℃, choose a partner dedicated to precision manufacturing and documented quality. Contact us today for a detailed quotation, technical datasheets, and to discuss how our Marine Low Temperature Gate Valves can be integrated into your specific application.

Frequently Asked Questions (FAQ):

Q: What is the primary purpose of the extended bonnet on this valve?
A: The extended bonnet serves as a thermal barrier. It distances the stem packing and operating mechanism from the ultra-cold process fluid, preventing the packing from freezing solid and ensuring the valve remains operable even after prolonged exposure to cryogenic temperatures.
Q: Can this valve be used for both liquid and gas service at -196℃?
A: Yes, it is designed for handling both liquefied gases (like LNG) and cold gas vapors in downstream piping. The sealing design and material selection are validated for this full range of service within the specified temperature and pressure limits.
Q: What specific information is included in the Mill Test Report (MTR)?
A: The MTR is a material certificate traceable to the heat/lot number. It typically includes chemical composition analysis, results of mechanical tests (tensile strength, yield strength, impact toughness at low temperature), heat treatment records, and any applicable non-destructive testing reports.
Q: Are these valves suitable for submerged or seawater exposure applications?
A: The standard valves are designed for the contained cryogenic process. For direct seawater exposure or submerged service, additional specifications regarding external corrosion protection (e.g., specific coatings, cathodic protection requirements) must be discussed during the ordering process.
Q: What types of actuation are available besides manual handwheel operation?
A> We offer flexibility. The valves can be equipped with bevel gear operators for high-torque applications, or prepared for the later mounting of pneumatic, hydraulic, or electric actuators. Actuator selection depends on required operating speed, available power source, and automation level.
Q: How do you ensure the valve seats remain leak-tight after thermal cycling?
A> We employ design features like a flexible wedge that can compensate for thermal contraction/expansion, or use hard-faced seat rings (e.g., Stellite) that resist wear and deformation. The combination of precise machining and appropriate material pairing ensures sealing integrity through repeated cycles.
Q: What is the typical lead time for production and delivery?
A> Lead time varies based on size, pressure class, material, and order quantity. Standard configurations generally have shorter lead times. We provide accurate delivery estimates upon receipt of your detailed inquiry and can discuss expedited options if needed.
Q: Do you offer any post-sales support or warranty?
A> Yes, we provide a standard warranty against defects in material and workmanship. Additionally, we offer technical support for installation, operation, and maintenance guidance to ensure optimal performance throughout the valve's service life.