High-Performance Cryogenic Ball Valve

Qisheng High-Performance Cryogenic Ball Valve

When handling liquefied natural gas (LNG) and other super-cooled industrial gases, absolute reliability is essential. The Qisheng Cryogenic Ball Valve is specifically designed to deliver superior sealing and smooth operation in extreme temperatures ranging from -50°C to -196°C. Manufactured from premium forged steel, our valves are available in versatile Side Entry and Top Entry configurations to suit complex pipeline architectures. With an extended bonnet design to protect the stem packing from freezing, this valve ensures a safe, durable, and zero-leakage flow control solution for the world’s most demanding cryogenic applications.

Core Engineering Features

• Extreme Temperature Resilience: Engineered to operate flawlessly in ultra-low temperatures down to -196°C, making it the perfect choice for LNG, liquid nitrogen, and cryogenic ethylene services.
• Forged Steel Construction: The robust forged steel body eliminates the risk of porosity and ensures superior mechanical strength and structural integrity under severe thermal stress.
• Side Entry & Top Entry Options: Available in flexible structural designs. The Top Entry configuration allows for convenient in-line maintenance without removing the valve from the pipeline.
• Advanced Lip-Seal Technology: Features dynamic lip seals (using materials like Elgiloy + RPTFE for -196°C applications) for the seat, body, and stem to ensure strict emission control and bubble-tight isolation.
• High-Performance Soft Seating: Utilizes premium PCTFE seat rings that maintain their mechanical properties and reliable sealing characteristics even at cryogenic extremes.

Typical Applications

The Qisheng Cryogenic Ball Valve is highly suitable for critical infrastructure within the energy and gas sectors, including:

• LNG Industry: Liquefaction trains, receiving terminals, and cryogenic storage tanks.
• Industrial Gases: Processing and transport of liquid oxygen, liquid nitrogen, and liquid argon.
• Petrochemicals: Ethylene plants and other ultra-low temperature chemical processing facilities.

Technical & Operating Specifications

• Design Structure: Side Entry / Top Entry, Soft Seat, Forged Steel
• Operating Temperature Range: -50°C to -196°C
• Pressure Ratings: ASME Class 150, 300, 600, 900, 1500
• Maximum Size: Up to NPS 24″
• Standard Materials: Stainless Steel NACE compliant

Comprehensive Material Configuration

To safely handle extreme thermal gradients, our cryogenic ball valves are manufactured using carefully selected, NACE-compliant materials. Below is the standard material breakdown for -100°C and -196°C service conditions: