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Cryogenic Service Marine Butterfly Valve for LNG-Related FPSO Applications
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Engineered for extreme LNG FPSO environments down to -196°C, featuring an extended bonnet to prevent seal freeze-up and ensure reliable operation. Constructed with certified cryogenic-grade stainless steel and specialized PTFE seats for bubble-tight shut-off. Offers versatile actuation (manual, pneumatic, electric) and complies with key marine standards (API 609). Designed to enhance safety, reduce lifecycle costs, and ensure operational efficiency in critical cryogenic fluid handling.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
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Application:
Other, LNG Loading/Unloading
Service Temperature:
Down to -196°C (-320°F)
Body Material:
Stainless Steel (e.g., 316, 316L) or Duplex
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
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Application
Other, LNG Loading/Unloading
Service Temperature
Down to -196°C (-320°F)
Body Material
Stainless Steel (e.g., 316, 316L) or Duplex
Seat Material
PTFE or Specialized Cryogenic Polymer
Disc Material
Stainless Steel with Extended Stem Design
Pressure Rating
Class 150 to Class 600 (ANSI/API)
End Connection
Wafer, Lug, or Flanged (RF/RTJ)
Operation
Manual Lever/Gear, Pneumatic, or Electric Actuator
Size Range
2“ to 48“ (DN50 to DN1200)
Design Standard
API 609, BS EN 593, ISO 17292
As a specialized manufacturer of industrial valves since 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. leverages deep engineering expertise to produce mission-critical components for demanding offshore applications. Our Cryogenic Service Marine Butterfly Valve is engineered specifically for the harsh, ultra-low temperature environments found on LNG-related Floating Production Storage and Offloading (FPSO) vessels. This valve is not merely a component; it is a reliability solution designed to ensure safe, efficient, and uninterrupted operations in handling liquefied natural gas, boil-off gas (BOG), and other cryogenic fluids. We understand that valve failure in such critical service is not an option, which is why our design prioritizes exceptional sealing integrity, thermal stability, and operational durability under extreme conditions.
Core Features & Technical Advantages:
- Extended Bonnet/Stem Design: A critical feature for cryogenic service. The extended neck positions the stem seals and packing in a zone with a milder temperature gradient, preventing seal freeze-up and ensuring smooth, reliable operation even at temperatures as low as -196°C.
- Low-Temperature Optimized Sealing: The seat utilizes advanced PTFE compounds or specialized polymers engineered to retain elasticity and sealing force at cryogenic temperatures. The disc-to-seat interface is precision-machined to achieve bubble-tight shut-off, essential for safety and preventing product loss.
- Robust Construction Materials: Valve body, disc, and stem are manufactured from austenitic stainless steels (304, 316, 316L) or duplex stainless steels, selected for their excellent toughness and resistance to brittle fracture at low temperatures. All materials are certified and traceable.
- Fire-Safe Design (Optional): Available with fire-safe features per API 607/API 6FA standards, where the seat design allows for secondary metal-to-metal sealing in the event of a fire, containing the fluid and preventing catastrophic failure.
- Versatile Actuation Options: To suit various FPSO control system requirements, the valve can be supplied with manual levers, precision gear operators, pneumatic actuators (double-acting or spring-return), or electric actuators. All actuation packages are designed for cryogenic duty.
Key Technical Specifications:
| Parameter | Specification |
| Temperature Range | -196°C to +80°C (-320°F to +176°F) |
| Pressure Classes | ANSI Class 150, 300, 600; PN16, PN25, PN40 |
| Face-to-Face | Complies with API 609, ISO 5752 Series 20 |
| Leakage Class | Bubble-tight (Class VI per API 598) or Low Leakage (Class IV) |
| Stem Seal | Multiple-ring graphite or PTFE packing with lantern ring |
| Test & Inspection | Shell Test, Seat Test, Cryogenic Performance Test |
Benefits for Your FPSO Operations:
- Enhanced Safety & Reliability: The design mitigates risks associated with cryogenic valve failure, protecting personnel, the asset, and the environment.
- Reduced Lifecycle Cost: Durable materials and robust construction minimize maintenance frequency and extend service intervals, lowering total cost of ownership.
- Operational Efficiency: Reliable performance ensures smooth LNG transfer, BOG management, and fuel gas supply processes, avoiding costly downtime.
- Global Compliance: Valves are manufactured to meet international marine and offshore standards, facilitating class approval from major certification societies.
- Flexible Supply Chain: With annual exports valued between US$1-1.5 million and shipments from major ports like Shanghai, Guangzhou, Hong Kong, and Beijing, we ensure timely delivery to projects worldwide, including your key markets in North America, Europe, Southeast Asia, and the Middle East.
Backed by our ISO9001-certified quality management system, every cryogenic butterfly valve undergoes rigorous testing, including cryogenic chamber testing to validate performance under simulated service conditions. Our experience supplying to diverse global markets—from Northern Europe to Oceania—means we understand the specific technical and logistical requirements of international offshore projects. Choosing our valve means partnering with a dedicated manufacturer committed to delivering a product that stands up to the extreme demands of LNG FPSO applications. We invite you to contact us with your specific size, pressure class, and actuation requirements for a detailed quotation and technical support to secure the reliability your critical operations demand.
Frequently Asked Questions (FAQ)
-
Q: What makes a butterfly valve suitable for cryogenic service compared to a standard one?
A: Key differences include an extended bonnet to protect stem seals from extreme cold, materials certified for low-temperature impact resistance (like 316L SS), and specialized seat materials (PTFE blends) that remain flexible at very low temperatures to maintain a seal. -
Q: Can this valve be used for both LNG liquid and boil-off gas (BOG) service?
A: Yes, it is designed for a wide range of cryogenic services. The specific material selection and trim may be optimized based on the exact fluid (liquid vs. gas) and operating pressure/temperature profile. Please provide service details for precise recommendations. -
Q: What actuation method is recommended for FPSO applications?
A: This depends on the control philosophy. Pneumatic actuators are common for remote/automated operation. Manual gear operators are used for infrequent or backup service. Electric actuators are also an option. We can supply and integrate all types. -
Q: Are these valves suitable for submerged or seawater exposure on an FPSO?
A: The standard valve is designed for process fluid service. For external exposure to marine atmospheres or splash zones, specific exterior coatings or material upgrades (e.g., super duplex) are available upon request to enhance corrosion resistance. -
Q: Do you provide documentation for class approval (e.g., DNV, ABS, LR)?
A> Yes, we can provide the necessary material certificates, test reports (including cryogenic tests), and manufacturing data packs required to support approval from major marine classification societies. This is a standard part of our service for offshore projects. -
Q: What is the typical lead time for an order of these specialized valves?
A: Lead time varies based on size, material, actuation, and quantity. Standard configurations typically have a shorter lead time. We maintain efficient production planning to meet project schedules and can discuss expedited options if needed. -
Q: How do you ensure performance at -196°C?
A> We perform cryogenic performance testing, where the valve is cooled with liquid nitrogen and operated under pressure to verify sealing functionality and structural integrity at the designated low temperature. -
Q: Can the valve be repaired or maintained on the FPSO?
A> Yes, the design allows for in-line maintenance in many cases. Seat replacement kits and spare parts are available. We also provide maintenance manuals and can offer on-site service support if required.
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1Yr
Business Type
Manufacturer
Year Established
2016
Annual Export Value
US$1 Million - US$1.5 Million
Product Certifications
ISO9001
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