Handling deep-freeze fluids like Liquefied Natural Gas (LNG), liquid nitrogen, or liquid oxygen requires specialized engineering to prevent seal failure and operator injury. Our Cryogenic ball valve with extended stem (DQ41F-16P) is designed specifically for these -196°C environments. The key feature is the specialized extended stem, which moves the operating handle and packing box far away from the ultra-cold pipe, preventing "ice-up" and ensuring the seals stay at a safe, functional temperature. This Cryogenic ball valve with extended stem is a critical component for LNG fueling stations and industrial gas facilities.
Material stability is the foundation of our design. We subject every Cryogenic ball valve with extended stem to a deep-freeze treatment process to eliminate phase-change stress in the stainless steel before machining. The seats are crafted from PCTFE or specialized PTFE that remains elastic even at absolute zero temperatures. Drawing on our 30-year legacy, we perform 100% low-temperature nitrogen testing to ensure that our valves provide bubble-tight shutoff where it matters most-in the most extreme cold conditions on earth.
Specifications
Model: DQ41F-16P / 16R
Temp Range: -196°C to +80°C
Body Material: CF8 (304), CF8M (316)
Extension Length: Based on operating temperature (typically 200mm+)
Seat Material: PCTFE (Kel-F), Modified PTFE
Application Areas
- LNG Infrastructure: Fueling stations and transport pipelines.
- Industrial Gas: Liquid nitrogen, oxygen, and argon systems.
- Aerospace: Cryogenic fluid control for testing and ground support.
Factory Customization & Strength
Suhao's manufacturing base is equipped with specialized cryogenic testing pits and liquid nitrogen tanks. We can customize the Cryogenic ball valve with extended stem length to your specific insulation thickness and offer full integration with pneumatic actuators for remote emergency shutdown. As a certified manufacturer, we provide the specialized cryogenic test reports and material certifications required for high-stakes energy projects.
Quality Control & After-Sales
Every unit undergoes 100% shell testing and specialized ultra-low temperature seal testing (-196°C). We provide a 12-month warranty and 24/7 technical support. Our engineers are available to provide installation guidance for vacuum-jacketed or insulated piping systems to ensure your project's thermal efficiency.
FAQ
Q: Why is the stem so long?
A: It keeps the packing and operator above freezing, preventing ice from locking the valve or damaging the seals.
Q: Do you provide MTCs?
A: Yes, full material and low-temperature test certificates are provided with every Cryogenic ball valve with extended stem.
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