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    AI Overview
    Cryogenic Seals for Cryogenic Valve and LNG Application ...
    LNG cryogenic valve seals are specialized components designed to maintain tight, leak-proof performance at temperatures down to
    −162∘
    𝐶
     (
    −260∘
    𝐹
    ). They typically use spring-energized PTFE or metal seals to counteract material shrinkage and thermal cycling. Common types include stainless steel canted coil springs and PTFE jackets, ensuring durability and low friction. 
    Key Features and Materials 
    • Spring-Energized Seals: These are considered ideal for cryogenic applications, utilizing a polymer jacket (like PTFE) with a stainless steel spring to maintain sealing pressure.
    • Material Compatibility: Materials must remain flexible and resist brittleness at extreme lows, often using virgin or lightly filled PTFE, PCTFE (Kel-F), or stainless steel.
    • Design Optimization: Features include anti-extrusion lips to handle high pressure, and customized lip shapes to manage thermal contraction.
    • Types: Common, says to use metallic, PTFE, or graphite seals for these extreme temperatures. 
    Application in LNG Valves 
    • Triple Offset Valves (TOVs): Frequently used for LNG to provide long-lasting, tight shutoffs, as discussed by.
    • Floating Seats: Used in ball valves to automatically adjust to thermal deformation and prevent damage.
    • Extended Stems: Valve stems are often extended to prevent ice blockage and manage heat transfer. 
    Common Failure Modes 
    • Thermal Contraction: Rapid temperature changes can cause seals to lose contact with the gland, as explained in.
    • Permeation: Small cryogenic gas molecules can pass through materials that are not specifically designed for low permeability. 
    For more in-depth knowledge on the engineering behind these components, you can consult Bal Seal Engineering's page on cryogenic seal challenges. 
    If you are dealing with a specific type of valve, let me know: 
    • Is it a ball, globe, or butterfly valve?
    • What is the operating pressure?
    • Are you looking for primary seal (seat) or stem packing? 
    I can provide more targeted information on the best materials and designs. 
    • Cryogenic Seal Challenges and Types
      Some types of cryogenic seals include: * Metallic seals * Coated metal seals * Graphite seals * Elastomeric seals (O-rings) * Chev...
      Bal Seal Engineering
    • How to Optimize Cryogenic Seal Design: 3 Critical Factors
      Jan 17, 2024 — Anti-extrusion lip geometry is one of the properties that cryogenic seals should have to protect against leakage in LNG valves. Ot...
      Bal Seal Engineering
    • Cryogenic Valve Designs for Liquefied Natural Gas Applications
      Apr 17, 2024 — The LNG industry is increasingly moving away from traditional gate and ball valves to triple offset valves (TOVs). TOVs have sever...
      Emerson Automation Experts
    • Cryogenic Seals for LNG and Industrial Gas Systems
      Dec 8, 2025 — 1.What Makes Cryogenic Seals Different? Most standard seals come from elastomers. At very low temperature, many elastomers turn st...
      www.xhhseals.com
    • Cryogenic Seal Design Recommendations
      Jan 4, 2024 — Cryogenic seals are important in systems that move or store gases like hydrogen, helium, nitrogen, oxygen, and LNG. Low temperatur...
      Bal Seal Engineering
    • Cryogenic Butterfly Valve
      Mar 31, 2022 — this is the first offset axial offset stem center line has a radial eccentricity. size B from body center line. this is the second...
      1m
      YouTube·温州中优网络
    • Cryogenic Valve | Industrial Valves Overview | Value Valves
      Sep 22, 2025 — multiple international quality certification and fire safe certificated valve seat withstands high temperatures zero leakage and l...
      53s
      YouTube·Value Valves
    • Effective Sealing for Cryogenic Liquids
      Oct 8, 2024 — and may include fire explosion frostbite or asphyxiation. traditional compression seals are incapable of cryogenic temperature rub...
      2m
      YouTube·Chesterton Asia Pacific - Chesterton Customseal
    • LNG Cryogenic Valve Seals
      Low temperature cryogenic seals are widely used in LNG Compressors, Cryogenic Valve, LNG Fueling Systems. Sealing cryogenics is a ...
      www.jst-seals.com
    • Extreme Low Temperature Elastomers for Aerospace, Oil & Gas, and Space Applications | Parker O-Ring & Engineered Seals Division
      These connections are notoriously difficult to seal due to rapid temperature changes and high pressures. On top of that, the fluid...
      Parker US
    • Cryogenic Seal Challenges and Types
      Some types of cryogenic seals include: * Metallic seals * Coated metal seals * Graphite seals * Elastomeric seals (O-rings) * Chev...
      Bal Seal Engineering
    • How to Optimize Cryogenic Seal Design: 3 Critical Factors
      Jan 17, 2024 — Anti-extrusion lip geometry is one of the properties that cryogenic seals should have to protect against leakage in LNG valves. Ot...
      Bal Seal Engineering
    • Cryogenic Valve Designs for Liquefied Natural Gas Applications
      Apr 17, 2024 — The LNG industry is increasingly moving away from traditional gate and ball valves to triple offset valves (TOVs). TOVs have sever...
      Emerson Automation Experts
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    LNG Cryogenic Valve Seals


    JST-Seals
    https://www.jst-seals.com › blog › lng-cryogenic-valve-s...
    JST-Seals
    https://www.jst-seals.com › blog › lng-cryogenic-valve-s...
    Low temperature cryogenic seals are widely used in LNG Compressors, Cryogenic Valve, LNG Fueling Systems. Sealing cryogenics is a balancing act of many factors ...Read more

    Cryogenic Seal Challenges and Types


    Bal Seal Engineering
    https://www.balseal.com › cryogenic-seal-challenges
    Bal Seal Engineering
    https://www.balseal.com › cryogenic-seal-challenges
    Cryogenic seals must be able to withstand extrememly low temperatures, high pressures, and thermal cycling to guard against leakage and resist shrinking.

    Seals for Cryogenic Valves


    Advanced EMC Technologies
    https://advanced-emc.com › seals-for-cryogenic-valves
    Advanced EMC Technologies
    https://advanced-emc.com › seals-for-cryogenic-valves
    Jun 8, 2022 — One of the most popular solutions for achieving a solid seal in cryogenic valves is PTFE spring-energized seals.Read more

    Cryogenic Seal Design Recommendations


    Bal Seal Engineering
    https://www.balseal.com › cryogenic-seal-podcast
    Bal Seal Engineering
    https://www.balseal.com › cryogenic-seal-podcast
    In valves used to manage cryogenic LNG, typical seals can shrink and extrude. This can lead to costly, and often catastrophic leakage.Read more

    Cryogenic Seals for LNG and Industrial Gas Systems


    xhhseals.com
    https://www.xhhseals.com › blog › post › cryogenic-seal...
    xhhseals.com
    https://www.xhhseals.com › blog › post › cryogenic-seal...
    Dec 8, 2025 — Engineer's guide to cryogenic seals for LNG valves, nozzles and pumps. Learn key designs, materials and how to specify seals from a ...

    Cryogenic Design


    Trelleborg Group
    https://www.trelleborg.com › media › brochures
    Trelleborg Group
    https://www.trelleborg.com › media › brochures
    PDF
    Seals can withstand temperatures ranging from -253°C/-423°F to 250°C / 482°F and pressure up to 100 MPa / 15,000 psi. Cryogenic capability for safer ...Read more

    Dixon 3 in. PTFE Seal for Cryogenic LNG Couplings


    John M. Ellsworth
    https://www.jmesales.com › dixon-3-in-ptfe-seal-for-cr...
    John M. Ellsworth
    https://www.jmesales.com › dixon-3-in-ptfe-seal-for-cr...
    PTFE seal for Dixon's Cryogenic LNG Couplings. The gasket reduces force needed to make a tight connection and ensures safe and reliable transfer.Read more
    $27.13 · In stock · $35.37 delivery · 30-day returns

    Cryogenic Valves for LNG Applications: Selection, Design ...


    NSW Valve
    https://www.nswvalve.com › news › cryogenic-valves-fo...
    NSW Valve
    https://www.nswvalve.com › news › cryogenic-valves-fo...
    Master cryogenic valve selection for LNG applications. Explore design challenges, sealing solutions, and efficiency tips for extreme temperatures (-270°C).

    Cryogenic Valves: Technical Challenges and Sealing Keys


    kosenvalve.com
    https://www.kosenvalve.com › ... › Industry News
    kosenvalve.com
    https://www.kosenvalve.com › ... › Industry News
    Aug 28, 2025 — The sealing performance of cryogenic valves is one of their core indicators. Factors affecting valve sealing mainly include sealing pair ...Read more
  • Basic Principles of Cryogenic...
  • Key Factors of Cryogenic...
  • Surface Hydrophilicity

    • Types and Characteristics of LNG Cryogenic Valves


    INOX-TEK
    https://www.inox-tek.com.tw › ... › Valve Type / Material
    INOX-TEK
    https://www.inox-tek.com.tw › ... › Valve Type / Material
    Jul 26, 2024 — Cryogenic Butterfly Valves: Utilizing a circular disc at the center, these valves are shorter in length compared to other cryogenic valve types.Read more
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    Guangzhou JST Seals Technology Co., Ltd

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