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A cryogenic butterfly valve is an engineered quarter-turn valve specifically designed to regulate or isolate the flow of media in piping systems operating at extremely low temperatures, typically from -50°C (-58°F) down to -196°C (-321°F). These valves are characterized by their compact design, lightweight construction, and rapid operation, making them an efficient and cost-effective solution for a wide range of cryogenic applications.

  •    Description   

    A cryogenic butterfly valve is an engineered quarter-turn valve specifically designed to regulate or isolate the flow of media in piping systems operating at extremely low temperatures, typically from -50°C (-58°F) down to -196°C (-321°F). These valves are characterized by their compact design, lightweight construction, and rapid operation, making them an efficient and cost-effective solution for a wide range of cryogenic applications. Industries such as Liquefied Natural Gas (LNG), industrial gas production and distribution, chemical processing, and aerospace rely on these valves for reliable performance in severe service conditions.

    The fundamental design addresses the unique challenges posed by cryogenic temperatures, including material embrittlement, thermal contraction, and the necessity to keep sealing elements at functional temperatures.

     

       Key Design Features   

    • Extended Stem / Neck (Extended Spindle): Similar to other cryogenic valve types, butterfly valves feature a extended neck section between the body and the actuator. This critical design element serves to:
    • Protect the Seals: It positions the primary stem seals (typically located in the upper bushing) away from the extreme cold, maintaining their elasticity and sealing integrity.
    • Prevent Heat Ingress: It creates a thermal barrier, minimizing heat transfer from the environment to the cryogenic fluid, which is vital for system efficiency and preventing product boil-off.
    • Eliminate External Icing: It ensures that the operating mechanism (stem, actuator) remains free of ice, guaranteeing reliable operation and personnel safety.
    • Cryogenic-Optimized Seat Design: The seat is the heart of the valve's sealing performance. Cryogenic butterfly valves utilize advanced seat materials and designs:
      • Materials: Seats are made from advanced polymers such as modified PTFE (Teflon) or PEEK, which retain excellent flexibility and low-friction properties at cryogenic temperatures.
      • Sealing Principle: Many designs employ a eccentric or triple-offset design. This geometry reduces friction during operation by allowing the disc to lift off the seat before rotating, minimizing wear and ensuring a tight, bubble-tight seal when closed.
      • Cryogenic-Tough Materials: All wetted parts are selected for their ability to resist impact and embrittlement at low temperatures.
      • Body & Disc: Austenitic stainless steels (SS304, SS316L) are standard. For more corrosive services, duplex stainless steels or nickel alloys may be used.
      • Stem: Typically 300 series stainless steel or 17-4PH.
      • Low-Emission Stem Sealing: To meet stringent environmental standards (e.g., ISO 15848), cryogenic butterfly valves are equipped with advanced stem sealing systems, often incorporating multiple lip seals or live-loading packing to prevent fugitive emissions of hazardous gases.

     

       Technical Specifications   

    • Size Range: 2" to over 60" (DN50 to DN1500+)
    • Pressure Class:  ANSI 150 to 300 (PN16 to PN40); higher classes available with specific designs
    • Temperature Range:  -196°C to +80°C (-321°F to +176°F) 
    • End Connections:  Wafer, Lugged, Double Flanged, or Weld Ends
    • Standards:  API 609, BS 6364, ISO 28921, ASME B16.34

     

       Advantages and Applications   

    Advantages over Alternative Valves (e.g., Gate Valves):

    • Compact and Lightweight: Requires less space and support structure.
    • Quick Operation: Quarter-turn operation allows for fast open/close cycles.
    • Cost-Effective: Generally lower initial cost and total cost of ownership.
    • Excellent Flow Regulation: Suitable for both on/off and throttling services.
    • Primary Applications:
    • LNG Industry: Storage tanks, send-out lines, vaporizers, and truck loading stations.
    • Industrial Gases: Storage tanks for liquid oxygen (LOX), nitrogen (LIN), argon (LAR), hydrogen (LH2), and helium (LHe), as well as processing plants.
    • Chemical Industry: Handling of ethylene, propylene, and other liquefied gases.
    • CO2 Applications: In food and beverage industries or chemical processes.

     

       Conclusion   

    The cryogenic butterfly valve represents an optimal blend of performance, reliability, and economy for flow control in ultra-low-temperature environments. Its robust design, focused on overcoming the challenges of thermal contraction and seal integrity, makes it an indispensable component in modern cryogenic infrastructure. When selecting a valve, the specific application requirements—including temperature, pressure, cycle frequency, and media—must be carefully evaluated to choose between a resilient-seated or metal-seated (triple-offset) design for optimal service life and performance.

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Big Size Metal Seal Butterflly Valve
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1. The three-eccentric design provides instant contact or disconnection of the disc from the saddle, which guarantees zero wear and zero leakage.
2. The sealing ring is fully integrated into the drive, which allows to carry out replacement without dismantling the whole valve, the...
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ANSI Butterfly Valve
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1. The three-eccentric design provides instant contact or disconnection of the disc from the saddle, which guarantees zero wear and zero leakage.
2. The sealing ring is fully integrated into the drive, which allows to carry out replacement without dismantling the whole valve, the...
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High Pressure Butterfly Valve
1.  The three-eccentric design provides instant contact or disconnection of the disc from the saddle, which guarantees zero wear and zero leakage.
2.  The sealing ring is fully integrated into the drive, allowing replacement without dismantling the entire valve, significantly reducing maintenance costs.
3.  The sealing ring consists of laminated stainless steel metal plates and flexible graphite plates (graphito-rubber, asbestos-rubber, etc.), combining the advantages of metal rigid sealing an
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Big Size Rubber LIned Butterfly Valve
1.  The central line design provides instant contact or stable seal for both sides, which guarantees zero wear and zero leakage.
2.  The sealing ring consists of rubber, providing excellent sealing properties at both low and high flow rating.
3.  The selection of suitable materials makes the valve resistant to low/high flow rating and corrosion.
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Slow-Closing Damper Check Valve
Our Series HQ Slow-Closing Damper Check Valve is an engineered solution designed to prevent destructive water hammer in pump discharge and high-head fluid systems. Unlike standard check valves that close abruptly upon flow reversal, this valve features an external weighted lever and damping system that ensures a controlled, two-stage closing sequence. This critical functionality protects pipelines, pumps, and connected equipment from dangerous pressure surges (slam), significantly enhancing syst
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Forged Steel Small-Bore Valves Series
Our Series FSV-SB Forged Steel Valves are engineered for superior performance in high-pressure, high-temperature, and critical service applications where reliability is non-negotiable. Designed for small-bore piping systems (NPS ½" to 2"), these valves leverage the inherent strength of forged construction to provide exceptional integrity, leak-proof operation, and extended service life in the most demanding environments, including oil and gas, petrochemical, power generation, and refining.
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Check Valve
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1. Using solidwork and Finite Element Analysis design tools, optimize working parts moving action.
2. COSMOSXpress software help engineer to optimize valve's structure.
3. Flow simulation simulate medium's flowing action, heat transfer process, and help engineer to decrease cavation, make less flowing resistance.
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Fire Arrester
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Designed to protect against deflagration and detonation, capable of stopping the propagation of subsonic flame speeds.
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High-Temperature Nickel Alloy Globe Valves
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Due to structural characteristics, globe valves exhibit high flow resistance and significant pressure drop.
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To meet high requirements for sealing, reliability, and safety, the valve body is manufactured using integral forging or forging with welding from nickel alloy.
The sealing surfaces are hard-faced with cobalt-based alloy (e.g., Stellite) to ensure wear resistance and high-temperature stability.
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PTFE Lined Ball Valve
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1. Suitable for industrial pipelines requiring minimal flow resistance and frequent operation, such as water treatment, HVAC, and general chemical processes.
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Parallel Gate Valve
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1. Floating Double-Block Seats: Utilizes floating double-block-and-bleed seats to ensure reliable sealing. The seats incorporate resilient sealing pads internally, enhancing low-pressure sealing performance and providing fire-safe functionality.
2. Emergency Sealant Injection: The valve is equipped with an emergency sealant injection system, allowing temporary sealing in case of accidental damage to the sealing surfaces, ensuring continued operation and safety.
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High Pressure Control Valve
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The product details of the valve indicate that it features a multi-stage throttling system.
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Basket Type Strainer
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2. PN16/25/40, Class 150/300.
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5. Easy to clean and flushing.
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1. The product design complies with the standards NB/T 47044 and ASME B16.34.
2. The valve stem undergoes quenching and tempering as well as nitriding treatment, providing high-temperature resistance, wear resistance, and excellent corrosion resistance.
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2. Patented fire-resistant design (e.g., secondary metal seals) ensures zero leakage during fire events, complying with API 607/API 6FA standards.
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Welding End Ball Valve
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Wear-resistant ball valve
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ANSI Check Valve
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1. Using solidwork and Finite Element Analysis design tools, optimize working parts moving action.
2. COSMOSXpress software help engineer to optimize valve's structure.
3. Flow simulation simulate medium's flowing action, heat transfer process, and help engineer to decrease cavation, make less flowing resistance.
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ANSI Gate Valve
Products breif:
1. Using solidwork and Finite Element Analysis design tools, optimize working parts moving action.
2. COSMOSXpress software help engineer to optimize valve's structure.
3. Flow simulation simulate medium's flowing action, heat transfer process, and help engineer to decrease cavation, make less flowing resistance.
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ANSI Globe Valve
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1. Using solidwork and Finite Element Analysis design tools, optimize working parts moving action.
2. COSMOSXpress software help engineer to optimize valve's structure.
3. Flow simulation simulate medium's flowing action, heat transfer process, and help engineer to decrease cavation, make less flowing resistance.
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Anti-Flushing Globe Valve
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1. The product design complies with the NB/T 47044 and ASME B16.34 standards.
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Temperature and Pressure Reduction Units
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High Pressure Gate Valve With Pass Valve
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2. The main shaft has undergone quenching and nitriding treatment, featuring high heat resistance, wear resistance and excellent corrosion resistance.
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High Pressure Forged Check Valve
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2. The main shaft has undergone quenching and nitriding treatment, featuring high heat resistance, wear resistance and excellent corrosion resistance.
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High Temp&Pressure Inlet Valve
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Power Station Drainage Ball Valve - Integral Type
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Anti-Erosion Ball Structure: Ensures a larger flow area at the initial opening stage under the same stroke, rapidly reducing pressure differentials and minimizing high-pressure erosion time, effectively extending service life.
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High Pressure Drain Water Ball Valve
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2. Erosion-Resistant Ball Design: Provides a larger flow area for a given stroke in the initial opening phase, allowing for a faster reduction in...
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PowerStation Globe Valve
Product Breif:
1. The product design complies with standards NB/T 47044 and ASME B16.34.
2. The stem undergoes quenching and nitriding treatment, providing heat resistance, wear resistance, and high corrosion resistance.
3. The valve body’s mid-cavity features a self-sealing structure—the higher the internal pressure, the tighter the sealing.
4. The seat and disc sealing surfaces are overlay-welded with cobalt-based hard alloys (e.g., Stellite), ensuring zero leakage under extreme conditions.
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Cryogenic Service Ball Valve
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Steam Extraction Check Valve
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PFA lined Diaphragm Valve
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PTFE lined Butterfly Valve
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Minimum Flow Control Globe Valve
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1. This valve provides continuous control over a wide range of pressure variations.
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Triple Offset Butterfly Valve
Products breif:
1. The three-eccentric design provides instant contact or disconnection of the disc from the saddle, which guarantees zero wear and zero leakage.
2. The sealing ring is fully integrated into the drive, which allows to carry out replacement without dismantling the whole valve, the...
¥ 0.00
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