Pneumatic Cryogenic Ball Valve

Designed for reliable automated isolation of ultra-low-temperature media, our Pneumatic Cryogenic Ball Valves are engineered in accordance with BS 6364 to deliver dependable shut-off performance at temperatures as low as -196°C (-320°F).
With more than 15 years of manufacturing experience, these valves are widely used in LNG terminals, air separation units (ASU), liquid hydrogen systems, chemical plants, and other demanding cryogenic applications. Every valve is manufactured from carefully selected cryogenic materials and undergoes rigorous inspection to ensure reliable sealing, low operating torque, and long service life under repeated thermal cycling.

Cryogenic service presents challenges that conventional ball valves cannot reliably withstand. Extreme thermal contraction, rapid temperature changes, and trapped cavity pressure can lead to stem leakage, excessive actuator torque, seat damage, or premature valve failure.
Our valves are specifically engineered to eliminate these risks by providing:

• Bubble-tight shut-off (ISO 5208 Rate A)
• BS 6364 extended bonnet construction
• Automatic cavity pressure relief
• Low operating torque throughout thermal cycling
• 100% helium leak testing
• API 607 fire-safe design
• ISO 5211 direct actuator mounting
• EN 10204 3.1 material certification
• CE/PED compliance for international projects

1. BS 6364 Extended Bonnet Design
The extended bonnet positions the stem packing away from the cryogenic process fluid, allowing sealing components to remain much closer to ambient temperature.
Benefits

• Reduces stem leakage
• Extends packing service life
• Improves fugitive emission performance
• Minimizes maintenance requirements

2. Spring-Energized Cryogenic Sealing System
Primary sealing utilizes PCTFE (Kel-F) or TFM1600 seats combined with stainless steel spring-energized lip seals and live-loaded chevron packing. The energizing spring continuously compensates for thermal contraction during cryogenic service.
Benefits

• Bubble-tight sealing
• Stable operating torque
• Reduced seat wear
• Zero external leakage
• Longer maintenance intervals

3. Automatic Cavity Pressure Relief
Cryogenic liquids rapidly expand during vaporization. If liquid becomes trapped inside the valve cavity during shutdown, internal pressure can increase significantly.
Our self-relieving ball design automatically vents excess pressure toward the upstream pipeline, helping protect the valve body and improve operational safety.
Benefits

• Prevents cavity overpressure
• Protects internal components
• Improves operational safety
• Enhances valve reliability

4. Deep Cryogenic Treatment
All pressure-containing components undergo deep cryogenic treatment by immersion in liquid nitrogen at -196°C for a minimum of 24 hours prior to finish machining.
This process relieves residual machining stress, improves dimensional stability, enhances wear resistance, and minimizes distortion during long-term cryogenic operation.
Benefits

• Improved dimensional stability
• Reduced internal stress
• Lower operating torque
• Longer service life

5. Precision Ball & Seat Machining
The stainless steel ball is precision polished to Ra < 0.4 μm, while seat tolerances are optimized to compensate for differential thermal contraction between metallic and polymer components.
Benefits

• Lower friction
• Reduced actuator torque
• Less seat wear
• Improved sealing performance
• Extended operating life

To accommodate different project requirements, we offer:

Every valve undergoes comprehensive factory inspection before shipment to ensure dependable field performance.

Beyond supplying reliable cryogenic valves, we help customers reduce project risk and simplify procurement.
Factory-Tested Reliability
Every valve is fully tested before shipment, reducing commissioning time and minimizing unexpected maintenance.
Simplified Automation
ISO 5211 direct mounting eliminates additional brackets, improves actuator alignment, and reduces installation costs.
Complete Documentation
Comprehensive quality documentation supports project approvals, customer inspections, and international compliance requirements.
Flexible Manufacturing
We provide OEM branding, customized automation packages, special materials, and project-specific configurations for EPC contractors, distributors, and system integrators.
Global Supply Experience
With extensive export experience, we support customers worldwide with reliable delivery schedules and responsive technical assistance.

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